653318b7e4
for-await was transformed in @babel/helper-remap-async-to-generator, which was called by @babel/plugin-transform-async-to-generator and @babel/plugin-proposal-async-generator-functions. This prevented for-await statements in async functions to be transpiled if the transform-async-to-generator plugin was't enabled.
@babel/plugin-transform-async-to-generator
Turn async functions into ES2015 generators
In Babel 7,
transform-async-to-module-methodwas merged into this plugin
Example
In
async function foo() {
await bar();
}
Out
var _asyncToGenerator = function (fn) {
...
};
var foo = _asyncToGenerator(function* () {
yield bar();
});
Out with options
Turn async functions into a Bluebird coroutine
var Bluebird = require("bluebird");
var foo = Bluebird.coroutine(function* () {
yield bar();
});
Installation
npm install --save-dev @babel/plugin-transform-async-to-generator
Usage
Via .babelrc (Recommended)
.babelrc
Without options:
{
"plugins": ["@babel/plugin-transform-async-to-generator"]
}
With options:
{
"plugins": [
["@babel/plugin-transform-async-to-generator", {
"module": "bluebird",
"method": "coroutine"
}]
]
}
Via CLI
babel --plugins @babel/plugin-transform-async-to-generator script.js
Via Node API
require("@babel/core").transform("code", {
plugins: ["@babel/plugin-transform-async-to-generator"]
});