then(...).catch(...).finally is not a function"
时间: 2024-06-07 13:11:14 浏览: 12
This error typically occurs when you are trying to use the `finally` method on a promise, but the function is not available. This can happen if you are using an older version of JavaScript or if the environment you are working in does not support the `finally` method.
To fix this error, you can try updating your JavaScript version or using a polyfill to add support for the `finally` method. Alternatively, you can use a different approach to handle the promise, such as using separate `then` and `catch` methods, or chaining multiple promises together.
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.
axios报then(...).catch(...).finally is not a function异常
这个异常通常表示您的代码正在使用不支持 `finally` 方法的旧版本的 `Promise`。 `finally` 方法是在ES2018中引入的。
要解决这个问题,您需要将您的 `Promise` 版本升级到支持 `finally` 方法的版本。您可以使用 `Promise.prototype.finally` polyfill来实现这一点。
您可以将以下代码添加到您的项目中:
```
if (!Promise.prototype.finally) {
Promise.prototype.finally = function (callback) {
return this.then(
function (value) {
return Promise.resolve(callback()).then(function () {
return value;
});
},
function (reason) {
return Promise.resolve(callback()).then(function () {
throw reason;
});
}
);
};
}
```
这将在旧版本的Promise上添加一个 `finally` 方法的实现。
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