JS/jQuery: How can I automatically wrap <a href> tags around <img />s with the href being dynamic based on the img src?

Question

Heads up: I am quite new to Javascript and have so far only written very basic scripts based on jQuery. I am a quick study though..

What I am after is a way to:

1) identify tags

2) read the img tags

3) wrap the tag with an <a href> tag with a dynamic link based on the src of the img.

Example:

<img src="../../img_T/Culture/C_01/c_01_abb_005.jpg" width="310" height="180" alt="image1">

should become

<a href="../../img_L/Culture/C_01/c_01_abb_005.jpg"><img src="../../img_T/Culture/C_01/c_01_abb_005.jpg" width="310" height="180" alt="C 01 Abb 005"></a>

I am thinking that reading the src of each image and writing it to a variable, then reading that variable and replacing the /img_T/ with /img_L/ and then writing that to a new variable which can then be simply added to each href.

This is how far I have gotten, but this does not work at all:

/* in the comments 'xxx' represents a different unique image string */
/* This should get the <img src="../img_T/xxx" /> string as text and store it. */
var $imgSrc        =    $(".displaywrapper img").attr("src");

/* This part should use the above sourced <img src="../img_T/xxx" string and replace ../img_T/ of the src with ../img_L/ and store it in var = imgLink. */
var imgLink        =    $imgSrc.text().replace("img_T","img_L");

/* This part should then wrap the <img src="../img_T/xxx" /> so it becomes <a href="..img_L/xxx"><img src="../img_T/xxx" /></a> */
$(".displaywrapper img").each(function(){.wrap("<a href="imgLink"></a>")});

Thanks for reading. Jannis

Answer 1

I think this should do the trick:

$(document).ready(function() {
    $(".displayWrapper img").each(function() {
        var src = $(this).attr('src').replace('img_T','img_L');
        var a = $('<a/>').attr('href', src);
        $(this).wrap(a);
    });
});

Line 1: Wait for the document to be ready before doing anything..
Line 2: Loop through each image using jQuery's each function.
Line 3: Get the current image's src with attr and replace img_T with img_L
Line 4: Dynamically create a new <a> tag and set it's href attribute to the src in Line 3
Line 5: wrap the <a> tag around the <img> tag.