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## @vue/babel-sugar-composition-api-render-instance
> Ported from [luwanquan/babel-preset-vca-jsx](https://github.com/luwanquan/babel-preset-vca-jsx) by [@luwanquan](https://github.com/luwanquan)
Babel syntactic sugar for replacing `this` with `getCurrentInstance()` in Vue JSX with @vue/composition-api
### Babel Compatibility Notes
- This repo is only compatible with Babel 7.x
### Usage
Install the dependencies:
```sh
# for yarn:
yarn add @vue/babel-sugar-composition-api-render-instance
# for npm:
npm install @vue/babel-sugar-composition-api-render-instance --save
```
In your `.babelrc`:
```json
{
"plugins": ["@vue/babel-sugar-composition-api-render-instance"]
}
```
However it is recommended to use the [configurable preset](../babel-preset-jsx/README.md) instead.
### Details
This plugin automatically replaces `this` in `setup()` with `getCurrentInstance()`. This is required for JSX to work in @vue/composition-api as `this` is not available in `setup()`
Input:
```jsx
defineComponent({
setup() {
return () => <MyComponent vModel={a.b} />
}
})
```
Output (without @vue/babel-sugar-composition-api-render-instance):
```jsx
defineComponent({
setup() {
return () => <MyComponent model={{
value: a.b,
callback: $$v => {
this.$set(a, "b", $$v);
}
}} />
}
})
```
Output (with @vue/babel-sugar-composition-api-render-instance):
```jsx
import { getCurrentInstance } from "@vue/composition-api";
defineComponent({
setup() {
const __currentInstance = getCurrentInstance();
return () => <MyComponent model={{
value: a.b,
callback: $$v => {
__currentInstance.$set(a, "b", $$v);
}
}} />
}
})
```
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