December 2013
Intermediate to advanced
384 pages
9h 54m
English
Content preview from jQuery and JavaScript Phrasebook
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Changing an Image Source File
var imgArr = ["bison.jpg","peak.jpg","falls.jpg"]; var idx = 0; $(document).ready(function (){ $("img").on("click", function(){ if(idx<2) { idx++; } else { idx=0; } $(this).attr("src", imgArr[idx]); }); });
A common task in jQuery and JavaScript is changing the images displayed on the screen. Whether it is an online ad, a game, or an image gallery, it is much nicer to simply swap out the source file for an <img> element than reload the web page.
To change the image that is displayed in an <img> element, use the .attr("src", newImageURL) method to specify a new location of the new user file. When the src attribute changes, the browser automatically downloads the new image ...
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