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389 lines
6.7 KiB
389 lines
6.7 KiB
# Babel Plugin JSX for Vue 3
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[](https://www.npmjs.com/package/@vue/babel-plugin-jsx)
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[](https://github.com/actions-cool/issues-helper)
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To add Vue JSX support.
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English | [简体中文](/packages/babel-plugin-jsx/README-zh_CN.md)
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## Installation
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Install the plugin with:
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```bash
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npm install @vue/babel-plugin-jsx -D
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```
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Then add the plugin to your babel config:
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```json
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{
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"plugins": ["@vue/babel-plugin-jsx"]
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}
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```
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## Usage
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### options
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#### transformOn
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Type: `boolean`
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Default: `false`
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transform `on: { click: xx }` to `onClick: xxx`
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#### optimize
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Type: `boolean`
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Default: `false`
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enable optimization or not. It's not recommended to enable it If you are not familiar with Vue 3.
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#### isCustomElement
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Type: `(tag: string) => boolean`
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Default: `undefined`
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configuring custom elements
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#### mergeProps
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Type: `boolean`
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Default: `true`
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merge static and dynamic class / style attributes / onXXX handlers
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#### enableObjectSlots
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Type: `boolean`
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Default: `true`
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Whether to enable `object slots` (mentioned below the document) syntax". It might be useful in JSX, but it will add a lot of `_isSlot` condition expressions which increase your bundle size. And `v-slots` is still available even if `enableObjectSlots` is turned off.
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#### pragma
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Type: `string`
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Default: `createVNode`
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Replace the function used when compiling JSX expressions.
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#### resolveType
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Type: `boolean`
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Default: `false`
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(**Experimental**) Infer component metadata from types (e.g. `props`, `emits`, `name`). This is an experimental feature and may not work in all cases.
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## Syntax
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### Content
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functional component
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```jsx
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const App = () => <div>Vue 3.0</div>;
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```
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with render
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```jsx
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const App = {
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render() {
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return <div>Vue 3.0</div>;
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},
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};
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```
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```jsx
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import { withModifiers, defineComponent } from 'vue';
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const App = defineComponent({
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setup() {
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const count = ref(0);
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const inc = () => {
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count.value++;
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};
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return () => (
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<div onClick={withModifiers(inc, ['self'])}>{count.value}</div>
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);
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},
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});
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```
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Fragment
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```jsx
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const App = () => (
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<>
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<span>I'm</span>
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<span>Fragment</span>
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</>
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);
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```
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### Attributes / Props
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```jsx
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const App = () => <input type="email" />;
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```
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with a dynamic binding:
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```jsx
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const placeholderText = 'email';
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const App = () => <input type="email" placeholder={placeholderText} />;
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```
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### Directives
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#### v-show
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```jsx
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const App = {
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data() {
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return { visible: true };
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},
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render() {
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return <input v-show={this.visible} />;
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},
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};
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```
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#### v-model
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> Note: You should pass the second param as string for using `arg`.
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```jsx
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<input v-model={val} />
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```
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```jsx
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<input v-model:argument={val} />
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```
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```jsx
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<input v-model={[val, ['modifier']]} />
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// Or
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<input v-model_modifier={val} />
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```
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```jsx
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<A v-model={[val, 'argument', ['modifier']]} />
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// Or
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<input v-model:argument_modifier={val} />
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```
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Will compile to:
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```js
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h(A, {
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argument: val,
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argumentModifiers: {
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modifier: true,
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},
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'onUpdate:argument': ($event) => (val = $event),
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});
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```
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#### v-models (Not recommended since v1.1.0)
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> Note: You should pass a Two-dimensional Arrays to v-models.
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```jsx
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<A v-models={[[foo], [bar, 'bar']]} />
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```
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```jsx
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<A
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v-models={[
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[foo, 'foo'],
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[bar, 'bar'],
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]}
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/>
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```
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```jsx
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<A
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v-models={[
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[foo, ['modifier']],
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[bar, 'bar', ['modifier']],
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]}
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/>
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```
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Will compile to:
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```js
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h(A, {
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modelValue: foo,
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modelModifiers: {
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modifier: true,
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},
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'onUpdate:modelValue': ($event) => (foo = $event),
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bar: bar,
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barModifiers: {
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modifier: true,
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},
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'onUpdate:bar': ($event) => (bar = $event),
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});
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```
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#### custom directive
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Recommended when using string arguments
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```jsx
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const App = {
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directives: { custom: customDirective },
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setup() {
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return () => <a v-custom:arg={val} />;
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},
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};
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```
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```jsx
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const App = {
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directives: { custom: customDirective },
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setup() {
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return () => <a v-custom={[val, 'arg', ['a', 'b']]} />;
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},
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};
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```
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### Slot
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> Note: In `jsx`, _`v-slot`_ should be replaced with **`v-slots`**
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```jsx
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const A = (props, { slots }) => (
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<>
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<h1>{slots.default ? slots.default() : 'foo'}</h1>
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<h2>{slots.bar?.()}</h2>
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</>
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);
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const App = {
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setup() {
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const slots = {
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bar: () => <span>B</span>,
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};
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return () => (
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<A v-slots={slots}>
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<div>A</div>
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</A>
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);
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},
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};
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// or
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const App = {
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setup() {
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const slots = {
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default: () => <div>A</div>,
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bar: () => <span>B</span>,
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};
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return () => <A v-slots={slots} />;
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},
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};
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// or you can use object slots when `enableObjectSlots` is not false.
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const App = {
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setup() {
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return () => (
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<>
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<A>
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{{
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default: () => <div>A</div>,
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bar: () => <span>B</span>,
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}}
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</A>
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<B>{() => 'foo'}</B>
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</>
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);
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},
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};
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```
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### In TypeScript
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`tsconfig.json`:
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```json
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{
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"compilerOptions": {
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"jsx": "preserve"
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}
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}
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```
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## Who is using
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<table>
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<tbody>
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<tr>
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<td align="center">
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<a target="_blank" href="https://www.antdv.com/">
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<img
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width="32"
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src="https://github.com/vuejs/babel-plugin-jsx/assets/6481596/8d604d42-fe5f-4450-af87-97999537cd21"
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/>
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<br>
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<strong>Ant Design Vue</strong>
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</a>
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</td>
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<td align="center">
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<a target="_blank" href="https://youzan.github.io/vant/#/zh-CN/">
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<img
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width="32"
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style="vertical-align: -0.32em; margin-right: 8px;"
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src="https://img.yzcdn.cn/vant/logo.png"
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/>
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<br>
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<strong>Vant</strong>
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</a>
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</td>
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<td align="center">
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<a target="_blank" href="https://github.com/element-plus/element-plus">
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<img
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height="32"
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style="vertical-align: -0.32em; margin-right: 8px;"
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src="https://user-images.githubusercontent.com/10731096/91267529-259f3680-e7a6-11ea-9a60-3286f750de01.png"
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/>
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<br>
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<strong>Element Plus</strong>
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</a>
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</td>
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<td align="center">
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<a target="_blank" href="https://github.com/leezng/vue-json-pretty">
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<img
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height="32"
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style="vertical-align: -0.32em; margin-right: 8px;"
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src="https://raw.githubusercontent.com/leezng/vue-json-pretty/master/static/logo.svg"
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/>
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<br>
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<strong>Vue Json Pretty</strong>
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</a>
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</td>
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</tr>
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</tbody>
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</table>
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## Compatibility
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This repo is only compatible with:
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- **Babel 7+**
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- **Vue 3+**
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