句法
response.blob().then(function(myBlob) {
// do something with myBlob
});
参数
None.
返回值
A promise that resolves with a Blob
.
例子
在我们 fetch request example (run fetch request live)中,我们使用Request.Request构造方法创建了一个新的request对象,然后使用它来获取一个JPG文件。当fetch成功的时候,我们使用blob()从response中读取一个Blob对象,并使用URL.createObjectURL 将它放入一个object URL ,然后把URL设置为img元素的src属性以显示这张图片。
var myImage = document.querySelector('img');
var myRequest = new Request('flowers.jpg');
fetch(myRequest)
.then(function(response) {
return response.blob();
})
.then(function(myBlob) {
var objectURL = URL.createObjectURL(myBlob);
myImage.src = objectURL;
});
规范
规范 | 状态 | 说明 |
---|---|---|
Fetch blob() |
Living Standard |
浏览器兼容性
We're converting our compatibility data into a machine-readable JSON format.
This compatibility table still uses the old format,
because we haven't yet converted the data it contains.
Find out how you can help!
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | 42 [1] |
(Yes) | 39 (39) [2] | 未实现 |
29 [3] |
未实现 |
Feature | Android | Edge | Firefox Mobile (Gecko) | Firefox OS (Gecko) | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|---|
Basic support | 未实现 | (Yes) | 未实现 | 未实现 | 未实现 | 未实现 | 未实现 | 未实现 |
[1] Behind a preference in version 41.
[2] Behind a preference starting with version 34.
[3] Behind a preference in version 28.