HTMLImageElement.currentSrc

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句法
范例
规范
浏览器兼容性
相关话题

只读 HTMLImageElement property currentSrc indicates the URL of the image which is currently presented in the <img> element it represents.

句法

let currentSource = htmlImageElement.currentSrc;

值

A USVString indicating the full URL of the image currently visible in the <img> element represented by the HTMLImageElement . This is useful when you provide multiple image options using the sizes and/or HTMLImageElement.srcset 特性。 currentSrc lets you determine which image from the set of provided images was selected by the browser.

范例

In this example, two different sizes are provided for an image of a clock. One is 200px wide and the other is 400px wide. The sizes attribute is provided to indicate that the image should be drawn at 50% of the document width if the viewport is under 400px wide; otherwise, the image is drawn at 90% width of the document.

HTML

 <img src="/files/16797/clock-demo-400px.png"
      alt="Clock"
      srcset="/files/16864/clock-demo-200px.png 200w, /files/16797/clock-demo-400px.png 400w"
      sizes="(max-width: 400px) 50%, 90%">

JavaScript

var clockImage = document.querySelector("img");
let p = document.createElement("p");
if (!clockImage.currentSrc.endsWith("200px.png")) {
  p.innerText = "Using the 200px image.";
} else {
  p.innerText = "Using the 400px image!";
}
document.body.appendChild(p);

结果

规范

规范	状态	注释
HTML 实时标准 The definition of 'HTMLImageElement.currentSrc' 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
`currentSrc`	Chrome 45	Edge 13	Firefox 38 38 不支持 32 — 52 Disabled Disabled ). To change preferences in Firefox, visit	IE No	Opera Yes	Safari 10.1	WebView Android 45	Chrome Android 45	Firefox Android 38 38 不支持 32 — 52 Disabled Disabled ). To change preferences in Firefox, visit	Opera Android No	Safari iOS 10.3	Samsung Internet Android 5.0

图例

完整支持
不支持
实验。期望将来行为有所改变。
用户必须明确启用此特征。

元数据

最后修改： Dec 8, 2019

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句法

值

范例

HTML

JavaScript

结果

规范

浏览器兼容性

图例

相关话题