22 lines
511 B
Markdown
22 lines
511 B
Markdown
---
|
||
title: Promise Reject
|
||
localeTitle: 承诺拒绝
|
||
---
|
||
## 承诺拒绝
|
||
|
||
`Promise.reject`函数向调用函数返回错误条件。它需要一个参数，一个Error对象或值作为拒绝的原因。
|
||
|
||
在Promise调用者的末尾链接catch函数将允许您捕获错误条件。
|
||
|
||
```javascript
|
||
promiseCallingFunction(paramList)
|
||
.then( ... )
|
||
...
|
||
.then( ... )
|
||
.catch( function(err) { // catch function
|
||
/*
|
||
* this is where you can access the reason for the rejection
|
||
*/
|
||
});
|
||
|
||
``` |