Improve documentation about the Zone.js async/await issue #5104
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MustafaHaddara
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Nov 8, 2024
## Which problem is this PR solving? Adds documentation on supplying your own context manager References: - https://opentelemetry.io/docs/languages/js/context/#context-manager - https://github.com/open-telemetry/opentelemetry-js/tree/main/packages/opentelemetry-context-zone-peer-dep#installation - open-telemetry/opentelemetry-js#1502 - open-telemetry/opentelemetry-js#5104 - open-telemetry/opentelemetry-js#3030 ## How to verify that this has the expected result read the docs
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Zone.js which is used for context management in the browser fails to maintain context across async/await syntax. The docs currently state that you have to transpile to ES2015 to get it to work. But in actuality you only need to transpile down async/await and async generators syntax AFAIK. For example using esbuild's
supported.{async-await,async-genetator}options, or using a Babel plugin. Which is what the Angular CLI does.In general Zone.js is not perfect and can cause a performance hit in some cases, so hopefully sometime in our lifetime, native async context will be available in the browser.
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