get() 方法在 FormData interface returns the first value associated with a given key from within a FormData object. If you expect multiple values and want all of them, use the getAll() method instead.

注意 : This method is available in Web 工作者 .

句法

formData.get(name);
					

参数

名称
USVString representing the name of the key you want to retrieve.

返回值

A FormDataEntryValue containing the value. If the key doesn't exist, the method returns null.

范例

The following line creates an empty FormData 对象:

var formData = new FormData();
					

If we add two username values using FormData.append :

formData.append('username', 'Chris');
formData.append('username', 'Bob');
					

下列 get() function will only return the first username value appended:

formData.get('username'); // Returns "Chris"
					

规范

规范 状态 注释
XMLHttpRequest
The definition of 'get()' in that specification.
实时标准

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据
桌面 移动
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
get Chrome 50 Edge 18 Firefox 39 IE No Opera 37 Safari 11 WebView Android 50 Chrome Android 50 Firefox Android 39 Opera Android 37 Safari iOS 11 Samsung Internet Android 5.0

图例

完整支持

完整支持

不支持

不支持

另请参阅

元数据

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