我使用Vue.js + TypeScript + Parcel进行演示,并尝试在 index.ts 中使用async/await
。
index.html
<html>
...
<body>
<script src="index.ts"></script>
</body>
</html>
index.ts
console.log('Not see me')
(async () => {
console.log('Did not execute here too.')
})()
执行parcel index.html
并打开 http://localhost:1234/ 。控制台抛出错误: regeneratorRuntime未定义
index.a4a28941.js:110 Uncaught ReferenceError: regeneratorRuntime is not defined
at index.a4a28941.js:110
at Object.parcelRequire.306 (index.ts:3)
at newRequire (index.a4a28941.js:48)
at parcelRequire.306 (index.a4a28941.js:80)
at index.a4a28941.js:106
似乎async
语法需要使用polyfill?
这是我的 tsconfig.json :
{
"compilerOptions": {
"allowSyntheticDefaultImports": true,
"baseUrl": ".",
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"jsx": "preserve",
"module": "esnext",
"moduleResolution": "node",
"noImplicitReturns": true,
"sourceMap": true,
"strict": true,
"target": "esnext",
"paths": {
"@/*": ["src/*"]
},
"lib": ["esnext", "esnext.array", "dom", "dom.iterable", "scripthost", "es2015.generator"]
},
"parcelTsPluginOptions": {
// If true type-checking is disabled
"transpileOnly": false
},
"include": ["src/**/*.ts", "src/**/*.tsx", "src/**/*.vue", "tests/**/*.ts", "tests/**/*.tsx"],
"exclude": ["node_modules"]
}
答案 0 :(得分:8)
我的解决方案是在target
文件中将"es5"
设置为tsconfig.json
:
{
"compilerOptions": {
"target": "es5"
}
}
但是,包裹似乎总是使用babel来转换javascript,这会导致打字稿编译器发生冲突(请参见此处:https://github.com/parcel-bundler/parcel/issues/954和此处:https://github.com/parcel-bundler/parcel/issues/871) 。有些人还通过在他们的项目中要求babel-polifill
来解决了这个问题,但是,如果您只想使用打字稿编译器并且没有babel进行任何转换,这似乎不是最佳选择。