# Babel Plugin JSX for Vue 3.0

![test](https://github.com/vueComponent/jsx/workflows/test/badge.svg)[![npm package](https://img.shields.io/npm/v/@ant-design-vue/babel-plugin-jsx.svg?style=flat-square)](https://www.npmjs.com/package/@ant-design-vue/babel-plugin-jsx)

To add Vue JSX support.

English | [简体中文](./README-zh_CN.md)

## Installation

Install the plugin with:

```
npm install @ant-design-vue/babel-plugin-jsx -D

npm install @ant-design-vue/babel-helper-vue-transform-on
```

Then add the plugin to .babelrc:

```
{
  "plugins": ["@ant-design-vue/babel-plugin-jsx"]
}
```

## Usage

### options

* transformOn

transform `on: { click: xx }` to `onClick: xxx`
* compatibleProps

compatible with Vue 2.x

`{ props, on = {}, attrs, ...rest }` will be transformed to `{ ...props, ...attrs, ...transformOn(on), ...rest }`

## Syntax

### Content
functional component

```jsx
const App = () => <div></div>
```

with render

```jsx
const App = {
  render() {
    return <div>Vue 3.0</div>
  }
}
```

```jsx
const App = defineComponent(() => {
  const count = ref(0);

  const inc = () => {
    count.value++;
  };

  return () => (
    <div onClick={inc}>
      {count.value}
    </div>
  )
})
```

Fragment

```jsx
const App = () => (
  <>
    <span>I'm</span>
    <span>Fragment</span>
  </>
)
```

### Attributes/Props

```jsx
const App = () => <input type="email" />
```

with a dynamic binding:

```jsx
const placeholderText = 'email'
const App = () => (
  <input
    type="email"
    placeholder={placeholderText}
  />
)
```

### Directives

> It is recommended to use camelCase version of it (`vModel`) in JSX, but you can use kebab-case too (`v-model`).

v-show

```jsx
const App = {
  data() {
    return { visible: true };
  },
  render() {
    return <input vShow={this.visible} />;
  },
};
```

v-model

* You can use underscore (`_`) instead of dot (`.`) for modifiers (`vModel_trim={this.test}`)

```jsx
export default {
  data: () => ({
    test: 'Hello World',
  }),
  render() {
    return (
      <>
        <input type="text" vModel_trim={this.test} />
        {this.test}
      </>
    )
  },
}
```

* Or you can use this proposal.

```jsx
<input vModel={[val, ['trim']]} />
```

```jsx
<A vModel={[val, 'foo', ['bar']]} />
```

Will compile to:

```js
h(A, {
  'foo': val,
  "fooModifiers": {
    "bar": true
  },
  "onUpdate:foo": $event => val = $event
})
```

custom directive

```jsx
const App = {
  directives: { custom: customDirective },
  setup() {
    return () => (
      <a
        vCustom={[val, 'arg', ['a', 'b']]}
      />
    );
  },
}
```

> Note: You should pass the second param as string for using `arg`.

### Slot 

```jsx
const App = {
  setup() {
    const slots = {
      a: () => <div>A</div>,
      b: () => <span>B</span>
    }
    return () => <A vSlots={slots} />
  }
}
```

## Who is using

<table>
  <tbody>
    <tr>
      <td align="center">
        <a target="_blank" href="https://www.antdv.com/">
          <img
            width="32"
            src="https://qn.antdv.com/logo.png"
          />
          <br>
          <strong>Ant Design Vue</strong>
        </a>
      </td>
      <td align="center">
        <a target="_blank" href="https://youzan.github.io/vant/#/zh-CN/">
          <img
            width="32"
            style="vertical-align: -0.32em; margin-right: 8px;"
            src="https://img.yzcdn.cn/vant/logo.png"
          />
          <br>
          <strong>Vant</strong>
        </a>
      </td>
    </tr>
  </tbody>
</table>

## Compatibility

This repo is only compatible with:

- **Babel 7+**
- **Vue 3+**