JavaScript Promise catch()
- Forrige side any()
- Neste side finally()
- Gå tilbake til forrige nivå JavaScript Promise referencemanual
Definition and usage
catch() The method provides a callback function.
The callback is a function that is executed when a Promise is rejected.
Example
myPromise.catch(x => myDisplay(x));
Syntax
promise.catch(rejected())
Parameters
| Parameters | Description |
|---|---|
| rejected() | Function to be executed when a Promise is rejected. |
Return value
| Type | Description |
|---|---|
| Object | New Promise object. |
Browser support
catch() is a feature of ECMAScript 6 (ES6).
Since June 2017, ES6 (JavaScript 2015) has been supported in all modern browsers:
| Chrome | Edge | Firefox | Safari | Opera |
|---|---|---|---|---|
| Chrome 51 | Edge 15 | Firefox 54 | Safari 10 | Opera 38 |
| 2016 年 5 月 | 2017 年 4 月 | 2017 年 6 月 | 2016 年 9 月 | 2016 年 6 月 |
catch() 不支持 Internet Explorer。
- Forrige side any()
- Neste side finally()
- Gå tilbake til forrige nivå JavaScript Promise referencemanual
