expected the promise rejection reason to be an error
或者说:什么是 unhandled promise rejection. 当 Promise 的状态变为 rejection 时,我们没有正确处理,让其一直冒泡(propagation),直至被进程捕获。这个 Promise 就被称为 unhandled promise rejection。 Promise 的异常,有两种触发方式: 主动调用 reject 方法; 抛出异常(exception) ESLint中文官网, ESLint中英文对照, JavaScript代码检测, JavaScript代码风格检测, JavaScript代码自动格式化,A pluggable and configurable linter tool for identifying and reporting on patterns in JavaScript.

reject(new Error(0)) 此随笔乃本人学习工作记录,如有疑问欢迎在下面评论,转载请标明出处。 如果对您有帮助请动动鼠标右下方给我来个赞,您的支持是我最大的动力。 Vue : Expected the Promise rejection reason to be an Error

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在vue项目中添加eslint,new 一个promise 一直显示错误 :expected the promise rejection reason to be an err This means that you have to provide an onRejected function even if you want to fall back to an undefined result value - for example obj.catch(() = {}).

The Promise.reject() method returns a Promise object that is rejected with a given reason. The catch() method returns a Promise and deals with rejected cases only.

It behaves the same as calling Promise.prototype.then(undefined, onRejected) (in fact, calling obj.catch(onRejected) internally calls obj.then(undefined, onRejected)). If you’re using JSON.parse directly, that’s a plain old synchronous call and you can replace the call with a console.log to see what’s going on.

That’s why the console.log must be in a separate .then block..

Note that these res.json() and res.text() functions are asynchronous, so you cannot log their return value directly. Fix JSON.parse Unexpected Token.

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