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Editorial Team
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Asked: 2026-05-15T02:21:57+00:00

I have a string containing HTML loaded from another page, how do I extract

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I have a string containing HTML loaded from another page, how do I extract the background property from it’s body tag using Javascript?

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'>

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1 Answer

  1. Editorial Team

    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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