jQuery Quick Tip: Extract CSS Background Image

jQuery allows you to get the background image of any element on a web page:

$("#myelement").css("background-image");

However, this returns it in an undesirable format: url(http://example.com/images/image.jpg) or url("http://example.com/images/image.jpg"). With a bit of string replacement, you can get extract the URL:

function extractUrl(input)
{
 // remove quotes and wrapping url()
 return input.replace(/"/g,"").replace(/url\(|\)$/ig, "");
}

So now you can just do this:

extractUrl($("#myelement").css("background-image"))

Which will return the URL on its own http://example.com/images/image.jpg.

Comments

Renowned Media said…
Regular expressions to the rescue!
4:58 pm, August 21, 2009
H. K. Nuhu said…
This seems to be a very useful blog for a web developer like me. I have been using jQuery and your blog site has some useful info. Thanks.
11:17 am, August 26, 2009
Post a Comment

Popular posts from this blog

Select box manipulation with jQuery

If you read the jQuery mailing list , you may be aware that I have updated my plugins for working with select boxes . Summary of changes: addOption replaces any options with the same value (so think of it as an add/replace options plugin selectOptions selected options in addition to what was already selected, but there is now an option for it not to do this There are two new methods: copyOptions which is for copying options between select boxes ajaxAddOption allows you to add options via AJAX (i.e. could be used for create options dynamically from a server script)
Read more

Basic Excel Spreadsheet Generation (ASP/ASP.NET)

The 'correct' way to generate Excel spreadsheets is through the use of Office Web Components . However, due to the licensing (see MSKB Article ) you cannot use them on a public internet site (as a client license for Office is needed for each user retrieving the document). However, this can be overcome due to the fact that Excel recognises HTML code. You can therefore output HTML that can be opened in Excel: First of all, set the content type and response header to make the browser handle it as an Excel spreadsheet. ASP VBScript: <%@Language="VBScript"%> <% Response.ContentType="application/vnd.ms-excel" Response.AddHeader "content-disposition", "attachment; filename=ExcelFileName" %> ASP JScript: <%@Language="JScript"%> <% Response.ContentType="application/vnd.ms-excel"; Response.AddHeader("content-disposition", "attachment; filename=ExcelFileName"); %
Read more

Link: HTML Agility Pack (.NET)

The HTML Agility Pack is an HTML parser for .NET, supporting XPATH and XSLT parsing. Basically the HTML equivalent of XmlDocument . Example use (from site): HtmlDocument doc = new HtmlDocument(); doc.Load("file.htm"); foreach(HtmlNode link in doc.DocumentElement.SelectNodes("//a[@href]") { HtmlAttribute att = link["href"]; att.Value = FixLink(att); } doc.Save("file.htm");
Read more