如何从JavaScript中包含HTML的字符串中提取background =值? [英] How do I extract a background= value from a string containing HTML in JavaScript?
问题描述
我有一个包含从另一个页面加载的HTML的字符串，如何使用Javascript从它的body标签中提取background属性?
I have a string containing HTML loaded from another page, how do I extract the background property from it's body tag using Javascript?
字符串中的body标签如下:
The body tag in the string looks like this:
<body onload='init();' background='storage/images/jsb_background.jpg' link='#000000' vlink='#000000' alink='#000000' leftmargin='0' topmargin='0' marginwidth='0' marginheight='0'>
谢谢！
推荐答案
我对此进行了正则表达式修补，它将在data字符串变量(包含HTML)中搜索body的background属性. >标签.正则表达式从此处被盗，并进行了一些修改.我对regex还是陌生的，所以我想它可以更流畅地完成，但仍然可以完成工作
I patched together a regex to do this, which will search the data string variable (containing the HTML) for the background attribute of the body tag. The regex is stolen from here and modified a bit. I'm still new to regex, so I guess it can be done more fluently, but it still gets the job done
var data = /* your html */;
var regex = /body.*background=["']?((?:.(?!["']?\s+(?:\S+)=|[>"']))+.)["']?/;
var result = regex.exec(data);
if (result.length > 1) {
var background = result[1];
alert(background);
}
else {
//no match
}
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