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import { parse as parseCjs, init as initCjsParser } from 'cjs-module-lexer'; | ||
import { parse as parseEs } from 'es-module-lexer'; | ||
import MagicString from 'magic-string'; | ||
import type { LoaderContext } from 'webpack'; | ||
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export default async function loader( | ||
this: LoaderContext<any>, | ||
source: string, | ||
map: any, | ||
meta: any | ||
) { | ||
const callback = this.async(); | ||
|
||
try { | ||
let isEsModule = true, esImports, moduleExports, namedExportsOrder; | ||
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try { | ||
// Do NOT remove await here. The types are wrong! It has to be awaited, | ||
// otherwise it will return a Promise<Promise<...>> when wasm isn't loaded. | ||
const parseResult = await parseEs(source); | ||
esImports = parseResult[0] || []; | ||
moduleExports = parseResult[1] || []; | ||
} catch { | ||
esImports = []; | ||
moduleExports = []; | ||
} | ||
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if (!moduleExports.length && !esImports.length) { | ||
isEsModule = false; | ||
try { | ||
await initCjsParser(); | ||
moduleExports = (parseCjs(source)).exports || []; | ||
} catch { | ||
moduleExports = []; | ||
} | ||
namedExportsOrder = moduleExports.filter( | ||
(e) => e !== 'default' && e !== '__esModule' | ||
); | ||
} else { | ||
namedExportsOrder = moduleExports.map( | ||
(e) => source.substring(e.s, e.e) | ||
).filter((e) => e !== 'default'); | ||
} | ||
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if (namedExportsOrder.indexOf('__namedExportsOrder') >= 0) { | ||
return callback(null, source, map, meta); | ||
} | ||
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const magicString = new MagicString(source); | ||
const namedExportsOrderString = JSON.stringify(namedExportsOrder); | ||
if (isEsModule) { | ||
magicString.append( | ||
`;export const __namedExportsOrder = ${namedExportsOrderString};` | ||
); | ||
} else { | ||
magicString.append( | ||
`;module.exports.__namedExportsOrder = ${namedExportsOrderString};` | ||
); | ||
} | ||
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const generatedMap = magicString.generateMap({ hires: true }); | ||
return callback(null, magicString.toString(), generatedMap, meta); | ||
} catch (err) { | ||
return callback(null, source, map, meta); | ||
} | ||
} |
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# Loader output source | ||
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## With `@babel/plugin-transform-modules-commonjs`: | ||
``` | ||
"use strict"; | ||
function _define_property(obj, key, value) { | ||
if (key in obj) { | ||
Object.defineProperty(obj, key, { | ||
value: value, | ||
enumerable: true, | ||
configurable: true, | ||
writable: true | ||
}); | ||
} else { | ||
obj[key] = value; | ||
} | ||
return obj; | ||
} | ||
function _object_spread(target) { | ||
for(var i = 1; i < arguments.length; i++){ | ||
var source = arguments[i] != null ? arguments[i] : {}; | ||
var ownKeys = Object.keys(source); | ||
if (typeof Object.getOwnPropertySymbols === "function") { | ||
ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function(sym) { | ||
return Object.getOwnPropertyDescriptor(source, sym).enumerable; | ||
})); | ||
} | ||
ownKeys.forEach(function(key) { | ||
_define_property(target, key, source[key]); | ||
}); | ||
} | ||
return target; | ||
} | ||
Object.defineProperty(exports, "__esModule", { | ||
value: true | ||
}); | ||
exports.default = exports.Default = void 0; | ||
var _react = _interopRequireDefault(require("react")); | ||
var _compo = require("./compo1"); | ||
var _jsxRuntime = require("react/jsx-runtime"); | ||
function _interopRequireDefault(obj) { | ||
return obj && obj.__esModule ? obj : { | ||
default: obj | ||
}; | ||
} | ||
var _default = exports.default = { | ||
title: "Components/Compo1", | ||
component: _compo.Compo1, | ||
parameters: { | ||
layout: "container" | ||
} | ||
}; | ||
var Template = function(args) { | ||
return /*#__PURE__*/ (0, _jsxRuntime.jsx)(_compo.Compo1, _object_spread({}, args)); | ||
}; | ||
var Default = exports.Default = Template.bind({}); | ||
;module.exports.__namedExportsOrder = ["Default"]; | ||
``` | ||
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## Without `@babel/plugin-transform-modules-commonjs`: | ||
``` | ||
function _define_property(obj, key, value) { | ||
if (key in obj) { | ||
Object.defineProperty(obj, key, { | ||
value: value, | ||
enumerable: true, | ||
configurable: true, | ||
writable: true | ||
}); | ||
} else { | ||
obj[key] = value; | ||
} | ||
return obj; | ||
} | ||
function _object_spread(target) { | ||
for (var i = 1; i < arguments.length; i++) { | ||
var source = arguments[i] != null ? arguments[i] : {}; | ||
var ownKeys = Object.keys(source); | ||
if (typeof Object.getOwnPropertySymbols === "function") { | ||
ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { | ||
return Object.getOwnPropertyDescriptor(source, sym).enumerable; | ||
})); | ||
} | ||
ownKeys.forEach(function (key) { | ||
_define_property(target, key, source[key]); | ||
}); | ||
} | ||
return target; | ||
} | ||
import React from "react"; | ||
import { Compo1 } from "./compo1"; | ||
import { jsx as _jsx } from "react/jsx-runtime"; | ||
export default { | ||
title: "Components/Compo1", | ||
component: Compo1, | ||
parameters: { | ||
layout: "container" | ||
} | ||
}; | ||
var Template = function (args) { | ||
return /*#__PURE__*/_jsx(Compo1, _object_spread({}, args)); | ||
}; | ||
export var Default = Template.bind({}); | ||
Default.parameters = { | ||
...Default.parameters, | ||
docs: { | ||
...Default.parameters?.docs, | ||
source: { | ||
originalSource: "args => <Compo1 {...args} />", | ||
...Default.parameters?.docs?.source | ||
} | ||
} | ||
};;export const __namedExportsOrder = ["Default"]; | ||
``` |
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