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Transform JSX spread children #45693

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Merged
merged 3 commits into from
Sep 24, 2021
Merged

Transform JSX spread children #45693

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d69eb09
Transform JSX spread children
jablko Sep 2, 2021
d5719fc
Target es2015 to skip helper and refine emit
jablko Sep 15, 2021
f138f0d
Merge branch 'main' of https://github.com/microsoft/TypeScript into p…
orta Sep 24, 2021
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3 changes: 2 additions & 1 deletion src/compiler/transformers/jsx.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -547,7 +547,8 @@ namespace ts {
}

function visitJsxExpression(node: JsxExpression) {
return visitNode(node.expression, visitor, isExpression);
const expression = visitNode(node.expression, visitor, isExpression);
return node.dotDotDotToken ? factory.createSpreadElement(expression!) : expression;
}
}

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36 changes: 24 additions & 12 deletions tests/baselines/reference/inlineJsxFactoryDeclarationsLocalTypes.js
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Expand Up @@ -89,31 +89,36 @@ const _brokenTree2 = <DOMSFC x={1} y={2}>{tree}{tree}</DOMSFC>

//// [component.js]
"use strict";
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
if (ar || !(i in from)) {
if (!ar) ar = Array.prototype.slice.call(from, 0, i);
ar[i] = from[i];
}
}
return to.concat(ar || Array.prototype.slice.call(from));
};
var _this = this;
exports.__esModule = true;
exports.tree = exports.MyClass = exports.MySFC = void 0;
/** @jsx predom */
var renderer2_1 = require("./renderer2");
var MySFC = function (props) { return (0, renderer2_1.predom)("p", null,
props.x,
var MySFC = function (props) { return renderer2_1.predom.apply(void 0, __spreadArray(["p", null, props.x,
" + ",
props.y,
" = ",
props.x + props.y,
_this.props.children); };
props.x + props.y], _this.props.children, false)); };
exports.MySFC = MySFC;
var MyClass = /** @class */ (function () {
function MyClass(props) {
this.props = props;
}
MyClass.prototype.render = function () {
return (0, renderer2_1.predom)("p", null,
this.props.x,
return renderer2_1.predom.apply(void 0, __spreadArray(["p", null, this.props.x,
" + ",
this.props.y,
" = ",
this.props.x + this.props.y,
this.props.children);
this.props.x + this.props.y], this.props.children, false));
};
return MyClass;
}());
Expand All @@ -124,6 +129,15 @@ exports.tree = (0, renderer2_1.predom)(exports.MySFC, { x: 1, y: 2 },
exports["default"] = (0, renderer2_1.predom)("h", null);
//// [index.js]
"use strict";
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
if (ar || !(i in from)) {
if (!ar) ar = Array.prototype.slice.call(from, 0, i);
ar[i] = from[i];
}
}
return to.concat(ar || Array.prototype.slice.call(from));
};
exports.__esModule = true;
/** @jsx dom */
var renderer_1 = require("./renderer");
Expand All @@ -142,13 +156,11 @@ var DOMClass = /** @class */ (function () {
this.props = props;
}
DOMClass.prototype.render = function () {
return (0, renderer_1.dom)("p", null,
this.props.x,
return renderer_1.dom.apply(void 0, __spreadArray(["p", null, this.props.x,
" + ",
this.props.y,
" = ",
this.props.x + this.props.y,
this.props.children);
this.props.x + this.props.y], this.props.children, false));
};
return DOMClass;
}());
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13 changes: 11 additions & 2 deletions tests/baselines/reference/tsxSpreadChildrenInvalidType.js
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Expand Up @@ -44,17 +44,26 @@ var __assign = (this && this.__assign) || function () {
};
return __assign.apply(this, arguments);
};
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
if (ar || !(i in from)) {
if (!ar) ar = Array.prototype.slice.call(from, 0, i);
ar[i] = from[i];
}
}
return to.concat(ar || Array.prototype.slice.call(from));
};
function Todo(prop) {
return React.createElement("div", null, prop.key.toString() + prop.todo);
}
function TodoList(_a) {
var todos = _a.todos;
return React.createElement("div", null, React.createElement(Todo, { key: todos[0].id, todo: todos[0].todo }));
return React.createElement.apply(React, __spreadArray(["div", null], React.createElement(Todo, { key: todos[0].id, todo: todos[0].todo }), false));
}
function TodoListNoError(_a) {
var todos = _a.todos;
// any is not checked
return React.createElement("div", null, React.createElement(Todo, { key: todos[0].id, todo: todos[0].todo }));
return React.createElement.apply(React, __spreadArray(["div", null], React.createElement(Todo, { key: todos[0].id, todo: todos[0].todo }), false));
}
var x;
React.createElement(TodoList, __assign({}, x));