Bump esbuild to 0.15.7

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
esbuild	0.14.48 -> 0.15.7

---

Release Notes

evanw/esbuild

v0.15.7

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• Add --watch=forever to allow esbuild to never terminate (#​1511, #​1885)

  Currently using esbuild's watch mode via --watch from the CLI will stop watching if stdin is closed. The rationale is that stdin is automatically closed by the OS when the parent process exits, so stopping watch mode when stdin is closed ensures that esbuild's watch mode doesn't keep running forever after the parent process has been closed. For example, it would be bad if you wrote a shell script that did esbuild --watch & to run esbuild's watch mode in the background, and every time you run the script it creates a new esbuild process that runs forever.

  However, there are cases when it makes sense for esbuild's watch mode to never exit. One such case is within a short-lived VM where the lifetime of all processes inside the VM is expected to be the lifetime of the VM. Previously you could easily do this by piping the output of a long-lived command into esbuild's stdin such as sleep 999999999 | esbuild --watch &. However, this possibility often doesn't occur to people, and it also doesn't work on Windows. People also sometimes attempt to keep esbuild open by piping an infinite stream of data to esbuild such as with esbuild --watch </dev/zero & which causes esbuild to spin at 100% CPU. So with this release, esbuild now has a --watch=forever flag that will not stop watch mode when stdin is closed.

• Work around PATH without node in install script (#​2519)

  Some people install esbuild's npm package in an environment without the node command in their PATH. This fails on Windows because esbuild's install script runs the esbuild command before exiting as a sanity check, and on Windows the esbuild command has to be a JavaScript file because of some internal details about how npm handles the bin folder (specifically the esbuild command lacks the .exe extension, which is required on Windows). This release attempts to work around this problem by using process.execPath instead of "node" as the command for running node. In theory this means the installer can now still function on Windows if something is wrong with PATH.

v0.15.6

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• Lower for await loops (#​1930)

  This release lowers for await loops to the equivalent for loop containing await when esbuild is configured such that for await loops are unsupported. This transform still requires at least generator functions to be supported since esbuild's lowering of await currently relies on generators. This new transformation is mostly modeled after what the TypeScript compiler does. Here's an example:

  async function f() {
    for await (let x of y)
      x()
  }

  The code above will now become the following code with --target=es2017 (omitting the code for the __forAwait helper function):

  async function f() {
    try {
      for (var iter = __forAwait(y), more, temp, error; more = !(temp = await iter.next()).done; more = false) {
        let x = temp.value;
        x();
      }
    } catch (temp) {
      error = [temp];
    } finally {
      try {
        more && (temp = iter.return) && await temp.call(iter);
      } finally {
        if (error)
          throw error[0];
      }
    }
  }

• Automatically fix invalid supported configurations (#​2497)

  The --target= setting lets you tell esbuild to target a specific version of one or more JavaScript runtimes such as chrome80,node14 and esbuild will restrict its output to only those features supported by all targeted JavaScript runtimes. More recently, esbuild introduced the --supported: setting that lets you override which features are supported on a per-feature basis. However, this now lets you configure nonsensical things such as --supported:async-await=false --supported:async-generator=true. Previously doing this could result in esbuild building successfully but producing invalid output.

  Starting with this release, esbuild will now attempt to automatically fix nonsensical feature override configurations by introducing more overrides until the configuration makes sense. So now the configuration from previous example will be changed such that async-await=false implies async-generator=false. The full list of implications that were introduced is below:

  • async-await=false implies:

    • async-generator=false
    • for-await=false
    • top-level-await=false

  • generator=false implies:

    • async-generator=false

  • object-accessors=false implies:

    • class-private-accessor=false
    • class-private-static-accessor=false

  • class-field=false implies:

    • class-private-field=false

  • class-static-field=false implies:

    • class-private-static-field=false

  • class=false implies:

    • class-field=false
    • class-private-accessor=false
    • class-private-brand-check=false
    • class-private-field=false
    • class-private-method=false
    • class-private-static-accessor=false
    • class-private-static-field=false
    • class-private-static-method=false
    • class-static-blocks=false
    • class-static-field=false

• Implement a small minification improvement (#​2496)

  Some people write code that contains a label with an immediate break such as x: break x. Previously this code was not removed during minification but it will now be removed during minification starting with this release.

• Fix installing esbuild via Yarn with enableScripts: false configured (#​2457)

  If esbuild is installed with Yarn with the enableScripts: false setting configured, then Yarn will not "unplug" the esbuild package (i.e. it will keep the entire package inside a .zip file). This messes with esbuild's library code that extracts the platform-specific binary executable because that code copies the binary executable into the esbuild package directory, and Yarn's .zip file system shim doesn't let you write to a directory inside of a .zip file. This release fixes this problem by writing to the node_modules/.cache/esbuild directory instead in this case. So you should now be able to use esbuild with Yarn when enableScripts: false is configured.

  This fix was contributed by @​jonaskuske.

v0.15.5

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• Fix issues with Yarn PnP and Yarn's workspaces feature (#​2476)

  This release makes sure esbuild works with a Yarn feature called workspaces. Previously esbuild wasn't tested in this scenario, but this scenario now has test coverage. Getting this to work involved further tweaks to esbuild's custom code for what happens after Yarn PnP's path resolution algorithm runs, which is not currently covered by Yarn's PnP specification. These tweaks also fix exports map resolution with Yarn PnP for non-empty subpaths, which wasn't previously working.

v0.15.4

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• Consider TypeScript import assignments to be side-effect free (#​2468)

  TypeScript has a legacy import syntax for working with TypeScript namespaces that looks like this:

  import { someNamespace } from './some-file'
  import bar = someNamespace.foo;
  
  // some-file.ts
  export namespace someNamespace {
    export let foo = 123
  }

  Since esbuild converts TypeScript into JavaScript one file at a time, it doesn't know if bar is supposed to be a value or a type (or both, which TypeScript actually allows in this case). This is problematic because values are supposed to be kept during the conversion but types are supposed to be removed during the conversion. Currently esbuild keeps bar in the output, which is done because someNamespace.foo is a property access and property accesses run code that could potentially have a side effect (although there is no side effect in this case).

  With this release, esbuild will now consider someNamespace.foo to have no side effects. This means bar will now be removed when bundling and when tree shaking is enabled. Note that it will still not be removed when tree shaking is disabled. This is because in this mode, esbuild supports adding additional code to the end of the generated output that's in the same scope as the module. That code could potentially make use of bar, so it would be incorrect to remove it. If you want bar to be removed, you'll have to enable tree shaking (which tells esbuild that nothing else depends on the unexported top-level symbols in the generated output).

• Change the order of the banner and the "use strict" directive (#​2467)

  Previously the top of the file contained the following things in order:

  1. The hashbang comment (see below) from the source code, if present
  2. The "use strict" directive from the source code, if present
  3. The content of esbuild's banner API option, if specified

  This was problematic for people that used the banner API option to insert the hashbang comment instead of using esbuild's hashbang comment preservation feature. So with this release, the order has now been changed to:

  1. The hashbang comment (see below) from the source code, if present
  2. The content of esbuild's banner API option, if specified
  3. The "use strict" directive from the source code, if present

  I'm considering this change to be a bug fix instead of a breaking change because esbuild's documentation states that the banner API option can be used to "insert an arbitrary string at the beginning of generated JavaScript files". While this isn't technically true because esbuild may still insert the original hashbang comment before the banner, it's at least more correct now because the banner will now come before the "use strict" directive.

  For context: JavaScript files recently allowed using a hashbang comment, which starts with #! and which must start at the very first character of the file. It allows Unix systems to execute the file directly as a script without needing to prefix it by the node command. This comment typically has the value #!/usr/bin/env node. Hashbang comments will be a part of ES2023 when it's released next year.

• Fix exports maps with Yarn PnP path resolution (#​2473)

  The Yarn PnP specification says that to resolve a package path, you first resolve it to the absolute path of a directory, and then you run node's module resolution algorithm on it. Previously esbuild followed this part of the specification. However, doing this means that exports in package.json is not respected because node's module resolution algorithm doesn't interpret exports for absolute paths. So with this release, esbuild will now use a modified algorithm that deviates from both specifications but that should hopefully behave more similar to what Yarn actually does: node's module resolution algorithm is run with the original import path but starting from the directory returned by Yarn PnP.

v0.15.3

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• Change the Yarn PnP manifest to a singleton (#​2463)

  Previously esbuild searched for the Yarn PnP manifest in the parent directories of each file. But with Yarn's enableGlobalCache setting it's possible to configure Yarn PnP's implementation to reach outside of the directory subtree containing the Yarn PnP manifest. This was causing esbuild to fail to bundle projects with the enableGlobalCache setting enabled.

  To handle this case, esbuild will now only search for the Yarn PnP manifest in the current working directory of the esbuild process. If you're using esbuild's CLI, this means you will now have to cd into the appropriate directory first. If you're using esbuild's API, you can override esbuild's value for the current working directory with the absWorkingDir API option.

• Fix Yarn PnP resolution failures due to backslashes in paths on Windows (#​2462)

  Previously dependencies of a Yarn PnP virtual dependency failed to resolve on Windows. This was because Windows uses \ instead of / as a path separator, and the path manipulation algorithms used for Yarn PnP expected /. This release converts \ into / in Windows paths, which fixes this issue.

• Fix sideEffects patterns containing slashes on Windows (#​2465)

  The sideEffects field in package.json lets you specify an array of patterns to mark which files have side effects (which causes all other files to be considered to not have side effects by exclusion). That looks like this:

  "sideEffects": [
    "**/index.js",
    "**/index.prod.js"
  ]

  However, the presence of the / character in the pattern meant that the pattern failed to match Windows-style paths, which broke sideEffects on Windows in this case. This release fixes this problem by adding additional code to handle Windows-style paths.

v0.15.2

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• Fix Yarn PnP issue with packages containing index.js (#​2455, #​2461)

  Yarn PnP's tests require the resolved paths to end in /. That's not how the rest of esbuild's internals work, however, and doing this messed up esbuild's node module path resolution regarding automatically-detected index.js files. Previously packages that relied on implicit index.js resolution rules didn't work with esbuild under Yarn PnP. Removing this slash has fixed esbuild's path resolution behavior regarding index.js, which should now the same both with and without Yarn PnP.

• Fix Yarn PnP support for extends in tsconfig.json (#​2456)

  Previously using extends in tsconfig.json with a path in a Yarn PnP package didn't work. This is because the process of setting up package path resolution rules requires parsing tsconfig.json files (due to the baseUrl and paths features) and resolving extends to a package path requires package path resolution rules to already be set up, which is a circular dependency. This cycle is broken by using special rules for extends in tsconfig.json that bypasses esbuild's normal package path resolution process. This is why using extends with a Yarn PnP package didn't automatically work. With this release, these special rules have been modified to check for a Yarn PnP manifest so this case should work now.

• Fix Yarn PnP support in esbuild-wasm (#​2458)

  When running esbuild via WebAssembly, Yarn PnP support previously failed because Go's file system internals return EINVAL when trying to read a .zip file as a directory when run with WebAssembly. This was unexpected because Go's file system internals return ENOTDIR for this case on native. This release updates esbuild to treat EINVAL like ENOTDIR in this case, which fixes using esbuild-wasm to bundle a Yarn PnP project.

  Note that to be able to use esbuild-wasm for Yarn PnP successfully, you currently have to run it using node instead of yarn node. This is because the file system shim that Yarn overwrites node's native file system API with currently generates invalid file descriptors with negative values when inside a .zip file. This prevents esbuild from working correctly because Go's file system internals don't expect syscalls that succeed without an error to return an invalid file descriptor. Yarn is working on fixing their use of invalid file descriptors.

v0.15.1

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• Update esbuild's Yarn Plug'n'Play implementation to match the latest specification changes (#​2452, #​2453)

  This release updates esbuild's implementation of Yarn Plug'n'Play to match some changes to Yarn's specification that just landed. The changes are as follows:

  • Check for platform-specific absolute paths instead of always for the / prefix

    The specification previously said that Yarn Plug'n'Play path resolution rules should not apply for paths that start with /. The intent was to avoid accidentally processing absolute paths. However, absolute paths on Windows such as C:\project start with drive letters instead of with /. So the specification was changed to instead explicitly avoid processing absolute paths.

  • Make $$virtual an alias for __virtual__

    Supporting Yarn-style path resolution requires implementing a custom Yarn-specific path traversal scheme where certain path segments are considered no-ops. Specifically any path containing segments of the form __virtual__/<whatever>/<n> where <n> is an integer must be treated as if they were n times the .. operator instead (the <whatever> path segment is ignored). So /path/to/project/__virtual__/xyz/2/foo.js maps to the underlying file /path/to/project/../../foo.js. This scheme makes it possible for Yarn to get node (and esbuild) to load the same file multiple times (which is sometimes required for correctness) without actually duplicating the file on the file system.

    However, old versions of Yarn used to use $$virtual instead of __virtual__. This was changed because $$virtual was error-prone due to the use of the $ character, which can cause bugs when it's not correctly escaped within regular expressions. Now that esbuild makes $$virtual an alias for __virtual__, esbuild should now work with manifests from these old Yarn versions.

  • Ignore PnP manifests in virtual directories

    The specification describes the algorithm for how to find the Plug'n'Play manifest when starting from a certain point in the file system: search through all parent directories in reverse order until the manifest is found. However, this interacts poorly with virtual paths since it can end up finding a virtual copy of the manifest instead of the original. To avoid this, esbuild now ignores manifests in virtual directories so that the search for the manifest will continue and find the original manifest in another parent directory later on.

  These fixes mean that esbuild's implementation of Plug'n'Play now matches Yarn's implementation more closely, and esbuild can now correctly build more projects that use Plug'n'Play.

v0.15.0

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This release contains backwards-incompatible changes. Since esbuild is before version 1.0.0, these changes have been released as a new minor version to reflect this (as recommended by npm). You should either be pinning the exact version of esbuild in your package.json file or be using a version range syntax that only accepts patch upgrades such as ~0.14.0. See the documentation about semver for more information.

• Implement the Yarn Plug'n'Play module resolution algorithm (#​154, #​237, #​1263, #​2451)

  Node comes with a package manager called npm, which installs packages into a node_modules folder. Node and esbuild both come with built-in rules for resolving import paths to packages within node_modules, so packages installed via npm work automatically without any configuration. However, many people use an alternative package manager called Yarn. While Yarn can install packages using node_modules, it also offers a different package installation strategy called Plug'n'Play, which is often shortened to "PnP" (not to be confused with pnpm, which is an entirely different unrelated package manager).

  Plug'n'Play installs packages as .zip files on your file system. The packages are never actually unzipped. Since Node doesn't know anything about Yarn's package installation strategy, this means you can no longer run your code with Node as it won't be able to find your packages. Instead, you need to run your code with Yarn, which applies patches to Node's file system APIs before running your code. These patches attempt to make zip files seem like normal directories. When running under Yarn, using Node's file system API to read ./some.zip/lib/file.js actually automatically extracts lib/file.js from ./some.zip at run-time as if it was a normal file. Other file system APIs behave similarly. However, these patches don't work with esbuild because esbuild is not written in JavaScript; it's a native binary executable that interacts with the file system directly through the operating system.

  Previously the workaround for using esbuild with Plug'n'Play was to use the @yarnpkg/esbuild-plugin-pnp plugin with esbuild's JavaScript API. However, this wasn't great because the plugin needed to potentially intercept every single import path and file load to check whether it was a Plug'n'Play package, which has an unusually high performance cost. It also meant that certain subtleties of path resolution rules within a .zip file could differ slightly from the way esbuild normally works since path resolution inside .zip files was implemented by Yarn, not by esbuild (which is due to a limitation of esbuild's plugin API).

  With this release, esbuild now contains an independent implementation of Yarn's Plug'n'Play algorithm (which is used when esbuild finds a .pnp.js, .pnp.cjs, or .pnp.data.json file in the directory tree). Creating additional implementations of this algorithm recently became possible because Yarn's package manifest format was recently documented: https://yarnpkg.com/advanced/pnp-spec/. This should mean that you can now use esbuild to bundle Plug'n'Play projects without any additional configuration (so you shouldn't need @yarnpkg/esbuild-plugin-pnp anymore). Bundling these projects should now happen much faster as Yarn no longer even needs to be run at all. Bundling the Yarn codebase itself with esbuild before and after this change seems to demonstrate over a 10x speedup (3.4s to 0.24s). And path resolution rules within Yarn packages should now be consistent with how esbuild handles regular Node packages. For example, fields such as module and browser in package.json files within .zip files should now be respected.

  Keep in mind that this is brand new code and there may be some initial issues to work through before esbuild's implementation is solid. Yarn's Plug'n'Play specification is also brand new and may need some follow-up edits to guide new implementations to match Yarn's exact behavior. If you try this out, make sure to test it before committing to using it, and let me know if anything isn't working as expected. Should you need to debug esbuild's path resolution, you may find --log-level=verbose helpful.

v0.14.54

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• Fix optimizations for calls containing spread arguments (#​2445)

  This release fixes the handling of spread arguments in the optimization of /* @​__PURE__ */ comments, empty functions, and identity functions:

  // Original code
  function empty() {}
  function identity(x) { return x }
  /* @​__PURE__ */ a(...x)
  /* @​__PURE__ */ new b(...x)
  empty(...x)
  identity(...x)
  
  // Old output (with --minify --tree-shaking=true)
  ...x;...x;...x;...x;
  
  // New output (with --minify --tree-shaking=true)
  function identity(n){return n}[...x];[...x];[...x];identity(...x);

  Previously esbuild assumed arguments with side effects could be directly inlined. This is almost always true except for spread arguments, which are not syntactically valid on their own and which have the side effect of causing iteration, which might have further side effects. Now esbuild will wrap these elements in an unused array so that they are syntactically valid and so that the iteration side effects are preserved.

v0.14.53

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This release fixes a minor issue with the previous release: I had to rename the package esbuild-linux-loong64 to @esbuild/linux-loong64 in the contributed PR because someone registered the package name before I could claim it, and I missed a spot. Hopefully everything is working after this release. I plan to change all platform-specific package names to use the @esbuild/ scope at some point to avoid this problem in the future.

v0.14.52

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• Allow binary data as input to the JS transform and build APIs (#​2424)

  Previously esbuild's transform and build APIs could only take a string. However, some people want to use esbuild to convert binary data to base64 text. This is problematic because JavaScript strings represent UTF-16 text and esbuild internally operates on arrays of bytes, so all strings coming from JavaScript undergo UTF-16 to UTF-8 conversion before use. This meant that using esbuild in this way was doing base64 encoding of the UTF-8 encoding of the text, which was undesired.

  With this release, esbuild now accepts Uint8Array in addition to string as an input format for the transform and build APIs. Now you can use esbuild to convert binary data to base64 text:

  // Original code
  import esbuild from 'esbuild'
  console.log([
    (await esbuild.transform('\xFF', { loader: 'base64' })).code,
    (await esbuild.build({ stdin: { contents: '\xFF', loader: 'base64' }, write: false })).outputFiles[0].text,
  ])
  console.log([
    (await esbuild.transform(new Uint8Array([0xFF]), { loader: 'base64' })).code,
    (await esbuild.build({ stdin: { contents: new Uint8Array([0xFF]), loader: 'base64' }, write: false })).outputFiles[0].text,
  ])
  
  // Old output
  [ 'module.exports = "w78=";\n', 'module.exports = "w78=";\n' ]
  /* ERROR: The input to "transform" must be a string */
  
  // New output
  [ 'module.exports = "w78=";\n', 'module.exports = "w78=";\n' ]
  [ 'module.exports = "/w==";\n', 'module.exports = "/w==";\n' ]

• Update the getter for text in build results (#​2423)

  Output files in build results returned from esbuild's JavaScript API have both a contents and a text property to return the contents of the output file. The contents property is a binary UTF-8 Uint8Array and the text property is a JavaScript UTF-16 string. The text property is a getter that does the UTF-8 to UTF-16 conversion only if it's needed for better performance.

  Previously if you mutate the build results object, you had to overwrite both contents and text since the value returned from the text getter is the original text returned by esbuild. Some people find this confusing so with this release, the getter for text has been updated to do the UTF-8 to UTF-16 conversion on the current value of the contents property instead of the original value.

• Publish builds for Linux LoongArch 64-bit (#​1804, #​2373)

  This release upgrades to Go 1.19, which now includes support for LoongArch 64-bit processors. LoongArch 64-bit builds of esbuild will now be published to npm, which means that in theory they can now be installed with npm install esbuild. This was contributed by @​beyond-1234.

v0.14.51

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• Add support for React 17's automatic JSX transform (#​334, #​718, #​1172, #​2318, #​2349)

  This adds support for the new "automatic" JSX runtime from React 17+ to esbuild for both the build and transform APIs.

  New CLI flags and API options:

  • --jsx, jsx — Set this to "automatic" to opt in to this new transform
  • --jsx-dev, jsxDev — Toggles development mode for the automatic runtime
  • --jsx-import-source, jsxImportSource — Overrides the root import for runtime functions (default "react")

  New JSX pragma comments:

  • @jsxRuntime — Sets the runtime (automatic or classic)
  • @jsxImportSource — Sets the import source (only valid with automatic runtime)

  The existing @jsxFragment and @jsxFactory pragma comments are only valid with "classic" runtime.

  TSConfig resolving:
  Along with accepting the new options directly via CLI or API, option inference from tsconfig.json compiler options was also implemented:

  • "jsx": "preserve" or "jsx": "react-native" → Same as --jsx=preserve in esbuild
  • "jsx": "react" → Same as --jsx=transform in esbuild (which is the default behavior)
  • "jsx": "react-jsx" → Same as --jsx=automatic in esbuild
  • "jsx": "react-jsxdev" → Same as --jsx=automatic --jsx-dev in esbuild

  It also reads the value of "jsxImportSource" from tsconfig.json if specified.

  For react-jsx it's important to note that it doesn't implicitly disable --jsx-dev. This is to support the case where a user sets "react-jsx" in their tsconfig.json but then toggles development mode directly in esbuild.

  esbuild vs Babel vs TS vs...

  There are a few differences between the various technologies that implement automatic JSX runtimes. The JSX transform in esbuild follows a mix of Babel's and TypeScript's behavior:

  • When an element has __source or __self props:

    • Babel: Print an error about a deprecated transform plugin
    • TypeScript: Allow the props
    • swc: Hard crash
    • esbuild: Print an error — Following Babel was chosen for this one because this might help people catch configuration issues where JSX files are being parsed by multiple tools

  • Element has an "implicit true" key prop, e.g. <a key />:

    • Babel: Print an error indicating that "key" props require an explicit value
    • TypeScript: Silently omit the "key" prop
    • swc: Hard crash
    • esbuild: Print an error like Babel — This might help catch legitimate programming mistakes

  • Element has spread children, e.g. <a>{...children}</a>

    • Babel: Print an error stating that React doesn't support spread children
    • TypeScript: Use static jsx function and pass children as-is, including spread operator
    • swc: same as Babel
    • esbuild: Same as TypeScript

  Also note that TypeScript has some bugs regarding JSX development mode and the generation of lineNumber and columnNumber values. Babel's values are accurate though, so esbuild's line and column numbers match Babel. Both numbers are 1-based and columns are counted in terms of UTF-16 code units.

  This feature was contributed by @​jgoz.

v0.14.50

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• Emit names in source maps (#​1296)

  The source map specification includes an optional names field that can associate an identifier with a mapping entry. This can be used to record the original name for an identifier, which is useful if the identifier was renamed to something else in the generated code. When esbuild was originally written, this field wasn't widely used, but now there are some debuggers that make use of it to provide better debugging of minified code. With this release, esbuild now includes a names field in the source maps that it generates. To save space, the original name is only recorded when it's different from the final name.

• Update parser for arrow functions with initial default type parameters in .tsx files (#​2410)

  TypeScript 4.6 introduced a change to the parsing of JSX syntax in .tsx files. Now a < token followed by an identifier and then a = token is parsed as an arrow function with a default type parameter instead of as a JSX element. This release updates esbuild's parser to match TypeScript's parser.

• Fix an accidental infinite loop with --define substitution (#​2407)

  This is a fix for a regression that was introduced in esbuild version 0.14.44 where certain --define substitutions could result in esbuild crashing with a stack overflow. The problem was an incorrect fix for #​2292. The fix merged the code paths for --define and --jsx-factory rewriting since the value substitution is now the same for both. However, doing this accidentally made --define substitution recursive since the JSX factory needs to be able to match against --define substitutions to integrate with the --inject feature. The fix is to only do one additional level of matching against define substitutions, and to only do this for JSX factories. Now these cases are able to build successfully without a stack overflow.

• Include the "public path" value in hashes (#​2403)

  The --public-path= configuration value affects the paths that esbuild uses to reference files from other files and is used in various situations such as cross-chunk imports in JS and references to asset files from CSS files. However, it wasn't included in the hash calculations used for file names due to an oversight. This meant that changing the public path setting incorrectly didn't result in the hashes in file names changing even though the contents of the files changed. This release fixes the issue by including a hash of the public path in all non-asset output files.

• Fix a cross-platform consistency bug (#​2383)

  Previously esbuild would minify 0xFFFF_FFFF_FFFF_FFFF as 0xffffffffffffffff (18 bytes) on arm64 chips and as 18446744073709552e3 (19 bytes) on x86_64 chips. The reason was that the number was converted to a 64-bit unsigned integer internally for printing as hexadecimal, the 64-bit floating-point number 0xFFFF_FFFF_FFFF_FFFF is actually 0x1_0000_0000_0000_0180 (i.e. it's rounded up, not down), and converting float64 to uint64 is implementation-dependent in Go when the input is out of bounds. This was fixed by changing the upper limit for which esbuild uses hexadecimal numbers during minification to 0xFFFF_FFFF_FFFF_F800, which is the next representable 64-bit floating-point number below 0x1_0000_0000_0000_0180, and which fits in a uint64. As a result, esbuild will now consistently never minify 0xFFFF_FFFF_FFFF_FFFF as 0xffffffffffffffff anymore, which means the output should now be consistent across platforms.

• Fix a hang with the synchronous API when the package is corrupted (#​2396)

  An error message is already thrown when the esbuild package is corrupted and esbuild can't be run. However, if you are using a synchronous call in the JavaScript API in worker mode, esbuild will use a child worker to initialize esbuild once so that the overhead of initializing esbuild can be amortized across multiple synchronous API calls. However, errors thrown during initialization weren't being propagated correctly which resulted in a hang while the main thread waited forever for the child worker to finish initializing. With this release, initialization errors are now propagated correctly so calling a synchronous API call when the package is corrupted should now result in an error instead of a hang.

• Fix tsconfig.json files that collide with directory names (#​2411)

  TypeScript lets you write tsconfig.json files with extends clauses that refer to another config file using an implicit .json file extension. However, if the config file without the .json extension existed as a directory name, esbuild and TypeScript had different behavior. TypeScript ignores the directory and continues looking for the config file by adding the .json extension while esbuild previously terminated the search and then failed to load the config file (because it's a directory). With this release, esbuild will now ignore exact matches when resolving extends fields in tsconfig.json files if the exact match results in a directory.

• Add platform to the transform API (#​2362)

  The platform option is mainly relevant for bundling because it mostly affects path resolution (e.g. activating the "browser" field in package.json files), so it was previously only available for the build API. With this release, it has additionally be made available for the transform API for a single reason: you can now set --platform=node when transforming a string so that esbuild will add export annotations for node, which is only relevant when --format=cjs is also present.

  This has to do with an implementation detail of node that parses the AST of CommonJS files to discover named exports when importing CommonJS from ESM. However, this new addition to esbuild's API is of questionable usefulness. Node's loader API (the main use case for using esbuild's transform API like this) actually bypasses the content returned from the loader and parses the AST that's present on the file system, so you won't actually be able to use esbuild's API for this. See the linked issue for more information.

v0.14.49

Compare Source

• Keep inlined constants when direct eval is present (#​2361)

  Version 0.14.19 of esbuild added inlining of certain const variables during minification, which replaces all references to the variable with the initializer and then removes the variable declaration. However, this could generate incorrect code when direct eval is present because the direct eval could reference the constant by name. This release fixes the problem by preserving the const variable declaration in this case:

  // Original code
  console.log((() => { const x = 123; return x + eval('x') }))
  
  // Old output (with --minify)
  console.log(()=>123+eval("x"));
  
  // New output (with --minify)
  console.log(()=>{const x=123;return 123+eval("x")});

• Fix an incorrect error in TypeScript when targeting ES5 (#​2375)

  Previously when compiling TypeScript code to ES5, esbuild could incorrectly consider the following syntax forms as a transformation error:

  0 ? ([]) : 1 ? ({}) : 2;

  The error messages looked like this:

  ✘ [ERROR] Transforming destructuring to the configured target environment ("es5") is not supported yet
  
      example.ts:1:5:
        1 │ 0 ? ([]) : 1 ? ({}) : 2;
          ╵      ^
  
  ✘ [ERROR] Transforming destructuring to the configured target environment ("es5") is not supported yet
  
      example.ts:1:16:
        1 │ 0 ? ([]) : 1 ? ({}) : 2;
          ╵                 ^
  

  These parenthesized literals followed by a colon look like the start of an arrow function expression followed by a TypeScript return type (e.g. ([]) : 1 could be the start of the TypeScript arrow function ([]): 1 => 1). Unlike in JavaScript, parsing arrow functions in TypeScript requires backtracking. In this case esbuild correctly determined that this expression wasn't an arrow function after all but the check for destructuring was incorrectly not covered under the backtracking process. With this release, the error message is now only reported if the parser successfully parses an arrow function without backtracking.

• Fix generated TypeScript enum comments containing */ (#​2369, #​2371)

  TypeScript enum values that are equal to a number or string literal are inlined (references to the enum are replaced with the literal value) and have a /* ... */ comment after them with the original enum name to improve readability. However, this comment is omitted if the enum name contains the character sequence */ because that would end the comment early and cause a syntax error:

  // Original TypeScript
  enum Foo { '/*' = 1, '*/' = 2 }
  console.log(Foo['/*'], Foo['*/'])
  
  // Generated JavaScript
  console.log(1 /* /* */, 2);

  This was originally handled correctly when TypeScript enum inlining was initially implemented since it was only supported within a single file. However, when esbuild was later extended to support TypeScript enum inlining across files, this special case where the enum name contains */ was not handled in that new code. Starting with this release, esbuild will now handle enums with names containing */ correctly when they are inlined across files:

  // foo.ts
  export enum Foo { '/*' = 1, '*/' = 2 }
  
  // bar.ts
  import { Foo } from './foo'
  console.log(Foo['/*'], Foo['*/'])
  
  // Old output (with --bundle --format=esm)
  console.log(1 /* /* */, 2 /* */ */);
  
  // New output (with --bundle --format=esm)
  console.log(1 /* /* */, 2);

  This fix was contributed by @​magic-akari.

• Allow declare class fields to be initialized (#​2380)

  This release fixes an oversight in the TypeScript parser that disallowed initializers for declare class fields. TypeScript actually allows the following limited initializer expressions for readonly fields:

  declare const enum a { b = 0 }
  
  class Foo {
    // These are allowed by TypeScript
    declare readonly a = 0
    declare readonly b = -0
    declare readonly c = 0n
    declare readonly d = -0n
    declare readonly e = 'x'
    declare readonly f = `x`
    declare readonly g = a.b
    declare readonly h = a['b']
  
    // These are not allowed by TypeScript
    declare readonly x = (0)
    declare readonly y = null
    declare readonly z = -a.b
  }

  So with this release, esbuild now allows initializers for declare class fields too. To future-proof this in case TypeScript allows more expressions as initializers in the future (such as null), esbuild will allow any expression as an initializer and will leave the specifics of TypeScript's special-casing here to the TypeScript type checker.

• Fix a bug in esbuild's feature compatibility table generator (#​2365)

  Passing specific JavaScript engines to esbuild's --target flag restricts esbuild to only using JavaScript features that are supported on those engines in the output files that esbuild generates. The data for this feature is automatically derived from this compatibility table with a script: https://kangax.github.io/compat-table/.

  However, the script had a bug that could incorrectly consider a JavaScript syntax feature to be supported in a given engine even when it doesn't actually work in that engine. Specifically this bug happened when a certain aspect of JavaScript syntax has always worked incorrectly in that engine and the bug in that engine has never been fixed. This situation hasn't really come up before because previously esbuild pretty much only targeted JavaScript engines that always fix their bugs, but the two new JavaScript engines that were added in the previous release (Hermes and Rhino) have many aspects of the JavaScript specification that have never been implemented, and may never be implemented. For example, the let and const keywords are not implemented correctly in those engines.

  With this release, esbuild's compatibility table generator script has been fixed and as a result, esbuild will now correctly consider a JavaScript syntax feature to be unsupported in a given engine if there is some aspect of that syntax that is broken in all known versions of that engine. This means that the following JavaScript syntax features are no longer considered to be supported by these engines (represented using esbuild's internal names for these syntax features):

  Hermes:

  • arrow
  • const-and-let
  • default-argument
  • generator
  • optional-catch-binding
  • optional-chain
  • rest-argument
  • template-literal

  Rhino:

  • arrow
  • const-and-let
  • destructuring
  • for-of
  • generator
  • object-extensions
  • template-literal

  IE:

  • const-and-let

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[render]

Your Render PR Server URL is https://toolpad-pr-930.onrender.com.

Follow its progress at https://dashboard.render.com/web/srv-ccclsi02i3mmql8ji30g.

[Janpot]

There seems to be a problem with running esbuild@>=0.14.53 within jest on this piece of code:
https://github.com/mui/mui-toolpad/blob/4e303873e140e8fd97d955ecf27790e906795d0e/packages/toolpad-app/src/toolpadDataSources/function/execFunction.ts#L123-L125

Opened ticket evanw/esbuild#2532 jestjs/jest#13227