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## @vue/babel-sugar-composition-api-inject-h
> Ported from [luwanquan/babel-preset-vca-jsx](https://github.com/luwanquan/babel-preset-vca-jsx) by [@luwanquan](https://github.com/luwanquan)
Syntactic sugar for automatic `h` inject in 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-inject-h
# for npm:
npm install @vue/babel-sugar-composition-api-inject-h --save
```
In your `.babelrc`:
```json
{
"plugins": ["@vue/babel-sugar-composition-api-inject-h"]
}
```
However it is recommended to use the [configurable preset](../babel-preset-jsx/README.md) instead.
### Details
This plugin automatically injects `h` in every method that has JSX. By using this plugin you don't have to always import `h` from `@vue/composition-api`.
```js
// Without @vue/babel-sugar-inject-h
import { h } from '@vue/composition-api'
export default {
setup() {
return () => <button />
},
}
```
```js
// With @vue/babel-sugar-inject-h
export default {
setup() {
return () => <button />
},
}
```

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"use strict";function _interopDefault(e){return e&&"object"==typeof e&&"default"in e?e.default:e}var syntaxJsx=_interopDefault(require("@babel/plugin-syntax-jsx"));const hasJSX=(e,t)=>{const n={hasJSX:!1};t.traverse({JSXElement(){this.hasJSX=!0}},n);return n.hasJSX},remove$createElement=(e,t)=>{t.traverse({ObjectMethod(t){"setup"===t.node.key.name&&t.traverse({VariableDeclaration(t){t.traverse({MemberExpression(n){e.isThisExpression(n.node.object)&&e.isIdentifier(n.node.property)&&"$createElement"===n.node.property.name&&t.remove()}})}})}})},autoImportH=(e,t,n)=>{if(hasJSX(e,t)){const i=t.get("body").filter(e=>e.isImportDeclaration()).map(e=>e.node),o=i.filter(e=>e.source.value===n),r=o.some(t=>t.specifiers.some(t=>e.isImportSpecifier(t)&&"h"===t.local.name));if(!r){const i=e.importSpecifier(e.identifier("h"),e.identifier("h"));o.length>0?o[0].specifiers.push(i):t.unshiftContainer("body",e.importDeclaration([i],e.stringLiteral(n)))}}};var index=(e,{importSource:importSource="@vue/composition-api"}={})=>{const t=e.types;return{inherits:syntaxJsx,visitor:{Program(e){remove$createElement(t,e),autoImportH(t,e,importSource)}}}};module.exports=index;

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{
"name": "@vue/babel-sugar-composition-api-inject-h",
"version": "1.4.0",
"description": "Babel syntactic sugar for h automatic injection for Vue JSX with @vue/composition-api",
"main": "dist/plugin.js",
"repository": "https://github.com/vuejs/jsx/tree/master/packages/babel-sugar-composition-api-inject-h",
"author": "luwanquan <luwanquan@f-road.com.cn>",
"license": "MIT",
"private": false,
"publishConfig": {
"access": "public"
},
"files": [],
"scripts": {
"prepublish": "yarn build",
"build": "rollup -c",
"build:test": "rollup -c rollup.config.testing.js",
"pretest": "yarn build:test",
"test": "nyc --reporter=html --reporter=text-summary ava -v test/test.js"
},
"devDependencies": {
"@babel/cli": "^7.2.0",
"@babel/core": "^7.2.0",
"@babel/preset-env": "^7.2.0",
"ava": "^0.25.0",
"nyc": "^13.1.0",
"rollup": "^0.67.4",
"rollup-plugin-babel": "4.0.3",
"rollup-plugin-istanbul": "^2.0.1",
"rollup-plugin-uglify-es": "^0.0.1",
"vue": "^2.5.17"
},
"dependencies": {
"@babel/plugin-syntax-jsx": "^7.2.0"
},
"peerDependencies": {
"@babel/core": "^7.0.0-0"
},
"nyc": {
"exclude": [
"dist",
"test"
]
},
"gitHead": "6566e12067f5d6c02d3849b574a1b84de5634008"
}