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这是一个实验中的功能
此功能某些浏览器尚在开发中，请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订，所以在未来版本的浏览器中该功能的语法和行为可能随之改变。
The ok read-only property of the Response interface contains a boolean stating whether the response was successful (status in the range 200-299) or not.
Syntax
var myOK = response.ok;
Value
A Boolean.
Example
In our Fetch Response example (see Fetch Response live) we create a new Request object using the Request() constructor, passing it a JPG path. We then fetch this request using fetch(), extract a blob from the response using Body.blob, create an object URL out of it using URL.createObjectURL, and display this in an <img>.
Note that at the top of the fetch() block we log the response ok value to the console.
var myImage = document.querySelector('img');
var myRequest = new Request('flowers.jpg');
fetch(myRequest).then(function(response) {
console.log(response.ok); // returns true if the response returned successfully
response.blob().then(function(myBlob) {
var objectURL = URL.createObjectURL(myBlob);
myImage.src = objectURL;
});
});
Specifications
| Specification | Status | Comment |
|---|---|---|
| Fetch ok |
Living Standard | Initial definition |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 42 41[1] |
39 (39) 34[1] |
未实现 |
29 |
未实现 |
| Feature | Android | Firefox Mobile (Gecko) | Firefox OS (Gecko) | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | 未实现 | 未实现 | 未实现 | 未实现 | 未实现 | 未实现 | 未实现 |
[1] This feature is implemented behind a preference.