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Jun 19, 2025
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5 changes: 5 additions & 0 deletions .changeset/fast-hairs-work.md
Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
swc_common: major
---

refactor(es/react): Split jsx into automatic/classic
1 change: 1 addition & 0 deletions Cargo.lock

Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.

13 changes: 13 additions & 0 deletions crates/jsdoc/tests/fixture.rs
Original file line number Diff line number Diff line change
Expand Up @@ -154,4 +154,17 @@ impl Comments for SwcComments {
leading.push(pure_comment);
}
}

fn for_each(&self, f: &mut dyn FnMut(&Comment)) {
for entry in self.leading.iter() {
for cmt in entry.value() {
f(cmt);
}
}
for entry in self.trailing.iter() {
for cmt in entry.value() {
f(cmt);
}
}
}
}
7 changes: 5 additions & 2 deletions crates/swc/benches/oxc.rs
Original file line number Diff line number Diff line change
Expand Up @@ -62,8 +62,11 @@ fn full_group(c: &mut Criterion) {
})),
transform: Some(TransformConfig {
react: swc_ecma_transforms::react::Options {
runtime: Some(Runtime::Automatic),
development: Some(react_dev),
runtime: Runtime::Automatic(Default::default()),
common: swc_ecma_transforms::react::CommonConfig {
development: react_dev.into(),
..Default::default()
},
..Default::default()
},
..Default::default()
Expand Down
49 changes: 24 additions & 25 deletions crates/swc/src/config/mod.rs
Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,7 @@ use swc_ecma_transforms::{
decorators, explicit_resource_management::explicit_resource_management,
export_default_from, import_attributes,
},
react::{self, default_pragma, default_pragma_frag},
react::{self},
resolver,
typescript::{self, TsImportExportAssignConfig},
Assumptions,
Expand Down Expand Up @@ -785,30 +785,29 @@ impl Options {
typescript::typescript(ts_config, unresolved_mark, top_level_mark),
syntax.typescript() && !syntax.jsx(),
),
// [TODO]: Remove tsx
Optional::new(
typescript::tsx::<Option<&dyn Comments>>(
cm.clone(),
ts_config,
typescript::TsxConfig {
pragma: Some(
transform
.react
.pragma
.clone()
.unwrap_or_else(default_pragma),
{
let (pragma, pragma_frag) = match transform.react.runtime {
react::Runtime::Classic(ref config) => (
Some(config.pragma.clone()),
Some(config.pragma_frag.clone()),
),
pragma_frag: Some(
transform
.react
.pragma_frag
.clone()
.unwrap_or_else(default_pragma_frag),
),
},
comments.map(|v| v as _),
unresolved_mark,
top_level_mark,
),
_ => (None, None),
};

typescript::tsx::<Option<&dyn Comments>>(
cm.clone(),
ts_config,
typescript::TsxConfig {
pragma,
pragma_frag,
},
comments.map(|v| v as _),
unresolved_mark,
top_level_mark,
)
},
syntax.typescript() && syntax.jsx(),
),
)
Expand All @@ -819,9 +818,9 @@ impl Options {
custom_before_pass(&program),
// handle jsx
Optional::new(
react::react::<&dyn Comments>(
react::react(
cm.clone(),
comments.map(|v| v as _),
comments.cloned(),
transform.react,
top_level_mark,
unresolved_mark,
Expand Down
Original file line number Diff line number Diff line change
@@ -1,3 +1,2 @@
var _require = require("foo/jsx-runtime"), _jsx = _require.jsx;
;
_jsx("a", {});
React.createElement("a", null);
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
{
"mappings": ";AAAA,SAASA,IAAI,EAAEC,GAAG,EAAEC,UAAU,QAAQ,MAAM;AAE5C,OAAO,MAAMC,YAAYD;IAkBrBE,SAAS;QACL,OAAOJ,IAAI,CAAC,UAAU,EAAE,IAAI,CAACK,IAAI,CAAC,KAAK,CAAC;IAC5C;IAPA,aAAc;QACV,KAAK,IAbTA,uBAAAA,QAAAA,KAAAA;QAcI,IAAI,CAACA,IAAI,GAAG;IAChB;AAKJ;AAlBI,iBAHSF,KAGFG,UAASL,GAAG,CAAC;;;;IAIpB,CAAC;AAED,iBATSE,KASFI,cAAa;IAChBF,MAAM;QAAEG,MAAMC;IAAO;AACzB;AAWJC,eAAeC,MAAM,CAAC,OAAOR",
"mappings": ";AAAA,SAASA,IAAI,EAAEC,GAAG,EAAEC,UAAU,QAAQ,MAAM;AAE5C,OAAO,MAAMC,YAAYD;IAkBrBE,SAAS;QACL,OAAOJ,IAAI,CAAC,UAAU,EAAE,IAAI,CAACK,IAAI,CAAC,KAAK,CAAC;IAC5C;IAPA,aAAc;QACV,KAAK,IAbTA,uBAAAA,QAAAA;QAcI,IAAI,CAACA,IAAI,GAAG;IAChB;AAKJ;AAlBI,iBAHSF,KAGFG,UAASL,GAAG,CAAC;;;;IAIpB,CAAC;AAED,iBATSE,KASFI,cAAa;IAChBF,MAAM;QAAEG,MAAMC;IAAO;AACzB;AAWJC,eAAeC,MAAM,CAAC,OAAOR",
"names": [
"html",
"css",
Expand Down
Original file line number Diff line number Diff line change
@@ -1,11 +1,12 @@
//// [intraExpressionInferencesJsx.tsx]
/// <reference path="/.lib/react16.d.ts" />
// repro from #52798
import { jsx as _jsx, Fragment as _Fragment } from "react/jsx-runtime";
var Component = function(param) {
var animations = param.animations, style = param.style;
return /*#__PURE__*/ React.createElement(React.Fragment, null);
return /*#__PURE__*/ _jsx(_Fragment, {});
};
/*#__PURE__*/ React.createElement(Component, {
/*#__PURE__*/ _jsx(Component, {
animations: {
test: {
kind: "a",
Expand All @@ -17,7 +18,7 @@ var Component = function(param) {
return "";
}
});
/*#__PURE__*/ React.createElement(Component, {
/*#__PURE__*/ _jsx(Component, {
animations: {
test: {
kind: "a",
Expand All @@ -34,7 +35,7 @@ var Component = function(param) {
return "";
}
});
/*#__PURE__*/ React.createElement(Component, {
/*#__PURE__*/ _jsx(Component, {
animations: {
test: {
kind: "a",
Expand All @@ -52,25 +53,25 @@ var Component = function(param) {
}
});
function Foo(props) {
return /*#__PURE__*/ React.createElement("div", null);
return /*#__PURE__*/ _jsx("div", {});
}
/*#__PURE__*/ React.createElement(Foo, {
/*#__PURE__*/ _jsx(Foo, {
a: function() {
return 10;
},
b: function(arg) {
arg.toString();
}
});
/*#__PURE__*/ React.createElement(Foo, {
/*#__PURE__*/ _jsx(Foo, {
a: function(x) {
return 10;
},
b: function(arg) {
arg.toString();
}
});
/*#__PURE__*/ React.createElement(Foo, {
/*#__PURE__*/ _jsx(Foo, {
a: function(x) {
return 10;
},
Expand Down
Original file line number Diff line number Diff line change
@@ -1 +1,2 @@
//// [intraExpressionInferencesJsx.tsx]
import "react/jsx-runtime";
Original file line number Diff line number Diff line change
Expand Up @@ -4,4 +4,11 @@
Object.defineProperty(exports, "__esModule", {
value: true
});
var a = /*#__PURE__*/ React.createElement("div", null, "text");
var _jsxdevruntime = require("react/jsx-dev-runtime");
var a = /*#__PURE__*/ (0, _jsxdevruntime.jsxDEV)("div", {
children: "text"
}, void 0, false, {
fileName: "jsxJsxsCjsTransformChildren.tsx",
lineNumber: 2,
columnNumber: 11
}, void 0);
Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
//// [jsxJsxsCjsTransformChildren.tsx]
Object.defineProperty(exports, "__esModule", {
value: !0
});
}), require("react/jsx-dev-runtime");
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,21 @@
Object.defineProperty(exports, "__esModule", {
value: true
});
var a = /*#__PURE__*/ React.createElement(React.Fragment, null, /*#__PURE__*/ React.createElement("p", null), "text", /*#__PURE__*/ React.createElement("div", {
className: "foo"
}));
var _jsxdevruntime = require("react/jsx-dev-runtime");
var a = /*#__PURE__*/ (0, _jsxdevruntime.jsxDEV)(_jsxdevruntime.Fragment, {
children: [
/*#__PURE__*/ (0, _jsxdevruntime.jsxDEV)("p", {}, void 0, false, {
fileName: "jsxJsxsCjsTransformCustomImport.tsx",
lineNumber: 3,
columnNumber: 3
}, void 0),
"text",
/*#__PURE__*/ (0, _jsxdevruntime.jsxDEV)("div", {
className: "foo"
}, void 0, false, {
fileName: "jsxJsxsCjsTransformCustomImport.tsx",
lineNumber: 5,
columnNumber: 3
}, void 0)
]
}, void 0, true);
Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
//// [jsxJsxsCjsTransformCustomImport.tsx]
Object.defineProperty(exports, "__esModule", {
value: !0
}), React.Fragment;
}), require("react/jsx-dev-runtime").Fragment;
Original file line number Diff line number Diff line change
Expand Up @@ -4,30 +4,46 @@
Object.defineProperty(exports, "__esModule", {
value: true
});
var _jsxruntime = require("preact/jsx-runtime");
var a = /*#__PURE__*/ (0, _jsxruntime.jsxs)(_jsxruntime.Fragment, {
var _jsxdevruntime = require("react/jsx-dev-runtime");
var a = /*#__PURE__*/ (0, _jsxdevruntime.jsxDEV)(_jsxdevruntime.Fragment, {
children: [
/*#__PURE__*/ (0, _jsxruntime.jsx)("p", {}),
/*#__PURE__*/ (0, _jsxdevruntime.jsxDEV)("p", {}, void 0, false, {
fileName: "preact.tsx",
lineNumber: 4,
columnNumber: 3
}, void 0),
"text",
/*#__PURE__*/ (0, _jsxruntime.jsx)("div", {
/*#__PURE__*/ (0, _jsxdevruntime.jsxDEV)("div", {
className: "foo"
})
}, void 0, false, {
fileName: "preact.tsx",
lineNumber: 6,
columnNumber: 3
}, void 0)
]
});
}, void 0, true);
//// [react.tsx]
/// <reference path="/.lib/react16.d.ts" />
/* @jsxImportSource react */ "use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
var _jsxruntime = require("react/jsx-runtime");
var _jsxdevruntime = require("react/jsx-dev-runtime");
require("./preact");
var a = /*#__PURE__*/ (0, _jsxruntime.jsxs)(_jsxruntime.Fragment, {
var a = /*#__PURE__*/ (0, _jsxdevruntime.jsxDEV)(_jsxdevruntime.Fragment, {
children: [
/*#__PURE__*/ (0, _jsxruntime.jsx)("p", {}),
/*#__PURE__*/ (0, _jsxdevruntime.jsxDEV)("p", {}, void 0, false, {
fileName: "react.tsx",
lineNumber: 5,
columnNumber: 3
}, void 0),
"text",
/*#__PURE__*/ (0, _jsxruntime.jsx)("div", {
/*#__PURE__*/ (0, _jsxdevruntime.jsxDEV)("div", {
className: "foo"
})
}, void 0, false, {
fileName: "react.tsx",
lineNumber: 7,
columnNumber: 3
}, void 0)
]
});
}, void 0, true);
Original file line number Diff line number Diff line change
@@ -1,10 +1,10 @@
//// [preact.tsx]
Object.defineProperty(exports, "__esModule", {
value: !0
}), require("preact/jsx-runtime").Fragment;
}), require("react/jsx-dev-runtime").Fragment;
//// [react.tsx]
Object.defineProperty(exports, "__esModule", {
value: !0
});
var _jsxruntime = require("react/jsx-runtime");
require("./preact"), _jsxruntime.Fragment;
var _jsxdevruntime = require("react/jsx-dev-runtime");
require("./preact"), _jsxdevruntime.Fragment;
Original file line number Diff line number Diff line change
Expand Up @@ -6,12 +6,24 @@ Object.defineProperty(exports, "__esModule", {
});
var _object_spread = require("@swc/helpers/_/_object_spread");
var _object_spread_props = require("@swc/helpers/_/_object_spread_props");
var _jsxdevruntime = require("react/jsx-dev-runtime");
var _react = require("react");
var props = {
answer: 42
};
var a = /*#__PURE__*/ React.createElement("div", _object_spread._({
key: "foo"
}, props), "text");
var b = /*#__PURE__*/ React.createElement("div", _object_spread_props._(_object_spread._({}, props), {
key: "bar"
var a = /*#__PURE__*/ (0, _jsxdevruntime.jsxDEV)("div", _object_spread_props._(_object_spread._({}, props), {
children: "text"
}), "foo", false, {
fileName: "jsxJsxsCjsTransformKeyProp.tsx",
lineNumber: 3,
columnNumber: 11
}, void 0);
var b = /*#__PURE__*/ (0, _react.createElement)("div", _object_spread_props._(_object_spread._({}, props), {
key: "bar",
__source: {
fileName: "jsxJsxsCjsTransformKeyProp.tsx",
lineNumber: 4,
columnNumber: 11
},
__self: void 0
}), "text");
Original file line number Diff line number Diff line change
Expand Up @@ -2,11 +2,19 @@
Object.defineProperty(exports, "__esModule", {
value: !0
});
var _object_spread = require("@swc/helpers/_/_object_spread"), _object_spread_props = require("@swc/helpers/_/_object_spread_props"), props = {
var _object_spread = require("@swc/helpers/_/_object_spread"), _object_spread_props = require("@swc/helpers/_/_object_spread_props");
require("react/jsx-dev-runtime"), require("react");
var props = {
answer: 42
};
_object_spread._({
key: "foo"
}, props), _object_spread_props._(_object_spread._({}, props), {
key: "bar"
_object_spread_props._(_object_spread._({}, props), {
children: "text"
}), _object_spread_props._(_object_spread._({}, props), {
key: "bar",
__source: {
fileName: "jsxJsxsCjsTransformKeyProp.tsx",
lineNumber: 4,
columnNumber: 11
},
__self: void 0
});
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