如何使用JavaScript获取元素的背景图片网址? [英] How to get background image URL of an element using JavaScript?

问题描述

如何获取JavaScript中<div>元素的background-image URL? 例如，我有这个:

How would I get the background-image URL of a <div> element in JavaScript? For example, I have this:

<div style="background-image:url('http://www.example.com/img.png');">...</div>

我怎么会恰好 background-image的URL?

推荐答案

您可以尝试以下操作:

var img = document.getElementById('your_div_id'),
style = img.currentStyle || window.getComputedStyle(img, false),
bi = style.backgroundImage.slice(4, -1).replace(/"/g, "");

// Get the image id, style and the url from it
var img = document.getElementById('testdiv'),
  style = img.currentStyle || window.getComputedStyle(img, false),
  bi = style.backgroundImage.slice(4, -1).replace(/"/g, "");

// Display the url to the user
console.log('Image URL: ' + bi);

<div id="testdiv" style="background-image:url('http://placehold.it/200x200');"></div>

基于@Miguel和下面的其他注释，如果您的浏览器(IE/FF/Chrome ...)将其添加到网址中，则可以尝试删除其他引号:

Based on @Miguel and other comments below, you can try this to remove additional quotation marks if your browser (IE/FF/Chrome...) adds it to the url:

bi = style.backgroundImage.slice(4, -1).replace(/"/g, "");

，如果可能包含单引号，请使用:replace(/['"]/g, "")

and if it may includes single quotation, use: replace(/['"]/g, "")

演示场

DEMO FIDDLE

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