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This PR contains the following updates:
0.19.11
->0.20.0
5.7.3
->5.7.4
Release Notes
evanw/esbuild (esbuild)
v0.20.0
Compare Source
This release deliberately contains backwards-incompatible changes. To avoid automatically picking up releases like this, you should either be pinning the exact version of
esbuild
in yourpackage.json
file (recommended) or be using a version range syntax that only accepts patch upgrades such as^0.19.0
or~0.19.0
. See npm's documentation about semver for more information.This time there is only one breaking change, and it only matters for people using Deno. Deno tests that use esbuild will now fail unless you make the change described below.
Work around API deprecations in Deno 1.40.x (#3609, #3611)
Deno 1.40.0 was just released and introduced run-time warnings about certain APIs that esbuild uses. With this release, esbuild will work around these run-time warnings by using newer APIs if they are present and falling back to the original APIs otherwise. This should avoid the warnings without breaking compatibility with older versions of Deno.
Unfortunately, doing this introduces a breaking change. The newer child process APIs lack a way to synchronously terminate esbuild's child process, so calling
esbuild.stop()
from within a Deno test is no longer sufficient to prevent Deno from failing a test that uses esbuild's API (Deno fails tests that create a child process without killing it before the test ends). To work around this, esbuild'sstop()
function has been changed to return a promise, and you now have to changeesbuild.stop()
toawait esbuild.stop()
in all of your Deno tests.Reorder implicit file extensions within
node_modules
(#3341, #3608)In version 0.18.0, esbuild changed the behavior of implicit file extensions within
node_modules
directories (i.e. in published packages) to prefer.js
over.ts
even when the--resolve-extensions=
order prefers.ts
over.js
(which it does by default). However, doing that also accidentally made esbuild prefer.css
over.ts
, which caused problems for people that published packages containing both TypeScript and CSS in files with the same name.With this release, esbuild will reorder TypeScript file extensions immediately after the last JavaScript file extensions in the implicit file extension order instead of putting them at the end of the order. Specifically the default implicit file extension order is
.tsx,.ts,.jsx,.js,.css,.json
which used to become.jsx,.js,.css,.json,.tsx,.ts
innode_modules
directories. With this release it will now become.jsx,.js,.tsx,.ts,.css,.json
instead.Why even rewrite the implicit file extension order at all? One reason is because the
.js
file is more likely to behave correctly than the.ts
file. The behavior of the.ts
file may depend ontsconfig.json
and thetsconfig.json
file may not even be published, or may useextends
to refer to a basetsconfig.json
file that wasn't published. People can get into this situation when they forget to add all.ts
files to their.npmignore
file before publishing to npm. Picking.js
over.ts
helps make it more likely that resulting bundle will behave correctly.v0.19.12
Compare Source
The "preserve" JSX mode now preserves JSX text verbatim (#3605)
The JSX specification deliberately doesn't specify how JSX text is supposed to be interpreted and there is no canonical way to interpret JSX text. Two most popular interpretations are Babel and TypeScript. Yes they are different (esbuild deliberately follows TypeScript by the way).
Previously esbuild normalized text to the TypeScript interpretation when the "preserve" JSX mode is active. However, "preserve" should arguably reproduce the original JSX text verbatim so that whatever JSX transform runs after esbuild is free to interpret it however it wants. So with this release, esbuild will now pass JSX text through unmodified:
Allow JSX elements as JSX attribute values
JSX has an obscure feature where you can use JSX elements in attribute position without surrounding them with
{...}
. It looks like this:I think I originally didn't implement it even though it's part of the JSX specification because it previously didn't work in TypeScript (and potentially also in Babel?). However, support for it was silently added in TypeScript 4.8 without me noticing and Babel has also since fixed their bugs regarding this feature. So I'm adding it to esbuild too now that I know it's widely supported.
Keep in mind that there is some ongoing discussion about removing this feature from JSX. I agree that the syntax seems out of place (it does away with the elegance of "JSX is basically just XML with
{...}
escapes" for something arguably harder to read, which doesn't seem like a good trade-off), but it's in the specification and TypeScript and Babel both implement it so I'm going to have esbuild implement it too. However, I reserve the right to remove it from esbuild if it's ever removed from the specification in the future. So use it with caution.Fix a bug with TypeScript type parsing (#3574)
This release fixes a bug with esbuild's TypeScript parser where a conditional type containing a union type that ends with an infer type that ends with a constraint could fail to parse. This was caused by the "don't parse a conditional type" flag not getting passed through the union type parser. Here's an example of valid TypeScript code that previously failed to parse correctly:
ljharb/tape (tape)
v5.7.4
Compare Source
Fixed
at:
#601
Commits
has-dynamic-import
1e50cb3
Configuration
📅 Schedule: Branch creation - "on the first day of the month" (UTC), Automerge - At any time (no schedule defined).
🚦 Automerge: Enabled.
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