Babel async await createObjectURL ( blob ) ; }. Sep 1, 2020 · It's just the import of stable core-js features and regenerator-runtime for generators and async functions, so if you load @babel/polyfill - you load the global version of core-js without ES proposals. These tools enable May 29, 2018 · Babel needs a little extra love if you want to transpile Async/Await or Generator Functions (link to docs). Using async await on ReactJS with Babel leads to Error: Unexpected token. babelrc: {"presets": ["env", "react"]} When I tried to implement Async this way, I received the following error: Babel plugin to transform async functions containing await expressions to the equivalent chain of Promise calls with use of minimal helper functions. Since Babel cannot automatically handle this runtime error, you should manually transform it to a promise. babelrc 如下配置： Jul 16, 2023 · The primary focus of this article was to dig into the transformation process performed by transpilers, such as Babel, that convert async/await code to generators and promises. Install babel-polyfill I'm assuming that you've already installed all webpack dependencies, along with babel config inside webpack config file Jun 6, 2017 · 让 async/await 跑起来. then(function(val) { console. Input: async function fetchAsObjectURL ( url ) { const response = await fetch ( url ) ; const blob = await response . log(val) // should output 1 }) 说明这些 babel 插件怎么搭配，三种方案： 方案一：regenerator. 通过最简单的一个函数： async function foo() { return await 1 } foo(). blob ( ) ; return URL . My project uses Babel inside of Webpack, together with Node Express and React. using async/await without babel-polyfill. 0. When using await with non-promise values, Bluebird will throw "Error: A value was yielded that could not be treated as a promise". Previously, this was my . 2. imdjyjalndvfcouoamkysojbvpxqzegxbyriwssmbvmzgvpxvtpdqmc