Promise.error is not
时间: 2023-10-31 16:54:23 浏览: 43
The error you are encountering suggests that the Promise object does not have a method called `error`. In JavaScript, the Promise object has two main methods: `resolve` and `reject`, which are used to fulfill or reject a promise respectively.
If you are trying to handle an error within a promise chain, you can use the `catch` method to catch and handle any rejected promises. Here's an example:
```javascript
const promise = new Promise((resolve, reject) => {
// Simulating an error
reject(new Error('Something went wrong'));
});
promise
.then(result => {
// Handle the resolved promise
console.log(result);
})
.catch(error => {
// Handle
相关问题
.finally is not a function
This error message usually appears when you try to use the `finally` keyword with a non-promise variable or object.
For example, if you try to use `finally` with a regular function or a variable, you will get this error.
To solve this issue, make sure that you are using `finally` with a promise. Here is an example:
```
somePromise
.then(result => {
// do something with the result
})
.catch(error => {
// handle the error
})
.finally(() => {
// do something regardless of whether the promise was fulfilled or rejected
});
```
In this example, `finally` is used with a promise and it will run regardless of whether the promise was fulfilled or rejected.
VM19:1 Uncaught (in promise) SyntaxError: Unexpected token 'U', "Unexpected"... is not valid JSON
VM19:1 Uncaught (in promise) SyntaxError: Unexpected token 'U', "Unexpected"... is not valid JSON 是一个 JavaScript 错误,表示在解析 JSON 数据时遇到了意外的标记。这通常是由于 JSON 数据格式不正确导致的。
JSON(JavaScript Object Notation)是一种常用的数据交换格式,它使用键值对的方式来表示数据。JSON 数据应该符合严格的语法规则,包括正确的引号使用、正确的逗号分隔等。
在你提供的错误信息中,"Unexpected token 'U'" 表示解析 JSON 数据时遇到了一个意外的标记 'U',这通常是由于数据中存在错误的字符或格式问题导致的。
要解决这个问题,你可以检查你的 JSON 数据是否符合正确的语法规则。确保所有的键和字符串都使用双引号包裹,确保逗号正确分隔每个键值对,确保没有多余的或缺失的括号等。
如果你能提供更多关于你遇到问题的上下文或代码片段,我可以给出更具体的帮助。
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