Support TypeScript experimental decorators on abstract class fields (#3684)
With this release, you can now use TypeScript experimental decorators on abstract class fields. This was silently compiled incorrectly in esbuild 0.19.7 and below, and was an error from esbuild 0.19.8 to esbuild 0.20.1. Code such as the following should now work correctly:
// Original code
const log = (x: any, y: string) => console.log(y)
abstract class Foo { @log abstract foo: string }
new class extends Foo { foo = '' }
// Old output (with --loader=ts --tsconfig-raw={"compilerOptions":{"experimentalDecorators":true}})
const log = (x, y) => console.log(y);
class Foo {
}
new class extends Foo {
foo = "";
}();
// New output (with --loader=ts --tsconfig-raw={"compilerOptions":{"experimentalDecorators":true}})
const log = (x, y) => console.log(y);
class Foo {
}
__decorateClass([
log
], Foo.prototype, "foo", 2);
new class extends Foo {
foo = "";
}();
JSON loader now preserves __proto__ properties (#3700)
Copying JSON source code into a JavaScript file will change its meaning if a JSON object contains the __proto__ key. A literal __proto__ property in a JavaScript object literal sets the prototype of the object instead of adding a property named __proto__, while a literal __proto__ property in a JSON object literal just adds a property named __proto__. With this release, esbuild will now work around this problem by converting JSON to JavaScript with a computed property key in this case:
// Original code
import data from 'data:application/json,{"__proto__":{"fail":true}}'
if (Object.getPrototypeOf(data)?.fail) throw 'fail'
// Old output (with --bundle)
(() => {
// <data:application/json,{"proto":{"fail":true}}>
var json_proto_fail_true_default = { proto: { fail: true } };
// entry.js
if (Object.getPrototypeOf(json_proto_fail_true_default)?.fail)
throw "fail";
})();
Support TypeScript experimental decorators on abstract class fields (#3684)
With this release, you can now use TypeScript experimental decorators on abstract class fields. This was silently compiled incorrectly in esbuild 0.19.7 and below, and was an error from esbuild 0.19.8 to esbuild 0.20.1. Code such as the following should now work correctly:
// Original code
const log = (x: any, y: string) => console.log(y)
abstract class Foo { @log abstract foo: string }
new class extends Foo { foo = '' }
// Old output (with --loader=ts --tsconfig-raw={"compilerOptions":{"experimentalDecorators":true}})
const log = (x, y) => console.log(y);
class Foo {
}
new class extends Foo {
foo = "";
}();
// New output (with --loader=ts --tsconfig-raw={"compilerOptions":{"experimentalDecorators":true}})
const log = (x, y) => console.log(y);
class Foo {
}
__decorateClass([
log
], Foo.prototype, "foo", 2);
new class extends Foo {
foo = "";
}();
JSON loader now preserves __proto__ properties (#3700)
Copying JSON source code into a JavaScript file will change its meaning if a JSON object contains the __proto__ key. A literal __proto__ property in a JavaScript object literal sets the prototype of the object instead of adding a property named __proto__, while a literal __proto__ property in a JSON object literal just adds a property named __proto__. With this release, esbuild will now work around this problem by converting JSON to JavaScript with a computed property key in this case:
// Original code
import data from 'data:application/json,{"__proto__":{"fail":true}}'
if (Object.getPrototypeOf(data)?.fail) throw 'fail'
// Old output (with --bundle)
(() => {
// <data:application/json,{"proto":{"fail":true}}>
var json_proto_fail_true_default = { proto: { fail: true } };
// entry.js
if (Object.getPrototypeOf(json_proto_fail_true_default)?.fail)
throw "fail";
})();
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Bumps esbuild from 0.20.0 to 0.20.2.
Release notes
Sourced from esbuild's releases.
... (truncated)
Changelog
Sourced from esbuild's changelog.
... (truncated)
Commits
617edda
publish 0.20.2 to npm4780075
fix #3700: json loader preserves__proto__
keys30bed2d
better errors for invalid js decorator syntax300eeb7
ts: allow non-null assertions in js decorators4d997d9
fix #3698: yarn pnp edge case withtsconfig.json
cf42954
resolver: improve some debug loggingb0765ae
fix some lintsdfa6206
fix some comments (closes #3683)ae5cc17
fix #3684:abstract
experimental decoratorsc809af0
fix #2388: allow consuming types without dom types (#3679)Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase
.Dependabot commands and options
You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot show