Question

REGEX to replace <IMG tag by class name

Asked by: Alejandro-Barrada-Martin

Hello, i need the regex to find an entire Html IMG Tag by giving only the class name.
I need to use Regex (not javascript getElementsByClass)


Can anyone tell me the correct regex string or the way to replace that:

Example - In the html code are:

ImageA <img alt="some" src="some" class="XXX" />
ImageB <img src="some" class="XXX" />
ImageC <img class="XXX" />
ImageD <img class="XXX" title="some" src="some" />

I need the code like

html = html.replace(REGEXCODENEEDED,'');

To get the html result as:

ImageA ImageB ImageC ImageD

Any solution ?

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Asked On
2009-09-26 at 17:04:07ID24764571
Tags

regex

,

regular expressions

,

class name

,

regex by class name

Topics

Regular Expressions

,

JavaScript

Participating Experts
3
Points
250
Comments
10

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Answers

 

by: billprewPosted on 2009-09-26 at 17:18:49ID: 25432181

Wouldn't something like this work?

<img.*/>

~bp

 

by: HonorGodPosted on 2009-09-26 at 17:52:40ID: 25432268

var imgRE = new RegExp( '(<img[^>]+class=(['"])XXX\2[^>]*>)', 'i' );
if ( imgRE.test( str ) ) {
  // Here, RegExp.$1 should contain your "img" tag
}

 

by: Alejandro-Barrada-MartinPosted on 2009-09-26 at 18:19:18ID: 25432351

Hi HonorGod,
Near, but your Regex i think that doen't work:

Please go to:
http://www.regular-expressions.info/javascriptexample.html

In the Replacement text put the string:

ImageA <img alt="some" src="some" class="XXX" />ImageB <img src="some" class="XXX" />ImageC <img class="XXX" />ImageD <img class="XXX" title="some" src="some" />

If you put the Regex str:

<img[^>]+class=(['"])XXX\2[^>]*>

That don't work

BUT i see that with:

<img[^>]+class=(['"])XXX[^>]*>

Now work

Any case your JScript code:

var imgRE = new RegExp( '(<img[^>]+class=(['"])XXX\2[^>]*>)', 'i' );

 doest not work, its not well writed

Can you accurate the code

 

by: HonorGodPosted on 2009-09-26 at 18:33:30ID: 25432391

This:

/(<img[^>]+class=([\'\"])XXX\2[^>]*>)/i

works just fine here:

http://regexpal.com/

The error with the earlier one was that I had failed to escape the single and double quotes... sorry.

 

by: Alejandro-Barrada-MartinPosted on 2009-09-26 at 18:53:39ID: 25432439

sorry don't work for me, dont' work at regexpal, dont work at http://www.regular-expressions.info/javascriptexample.html

Can you try on thelast one (http://www.regular-expressions.info/javascriptexample.html)
and tell me the code like:

var imgRE = new RegExp( '(<img[^>]+class=(['"])XXX\2[^>]*>)', 'i' );
But corrected and working

 

by: amit_gPosted on 2009-09-26 at 18:55:06ID: 25432443

s = "";
s += 'ImageA <img alt="some" src="some" class="XXX" />\n';
s += 'ImageB <img src="some" class="XXX" />\n';
s += 'ImageC <img class="XXX" />\n';
s += 'ImageD <img class="XXX" title="some" src="some" />\n';

var re = /(.+?) <img.*?class="XXX".*?>/gi;

s = s.replace(re, "$1");

alert(s);

 

by: Alejandro-Barrada-MartinPosted on 2009-09-26 at 19:08:57ID: 25432474

Thnks Honor finally resolved using:

var Result = HtmlString.replace(/(<img[^>]+class=([\'\"])XXXg[^>]*>)/, '');

Can you explain me why the \2

 

by: Alejandro-Barrada-MartinPosted on 2009-09-26 at 19:11:14ID: 31634025

Thnks Honor finally resolved using:

var Result = HtmlString.replace(/(<img[^>]+class=([\'\"])XXX[^>]*>)/, '');

Can you explain me why the \2

 

by: HonorGodPosted on 2009-09-27 at 06:30:06ID: 25433955

The \2 says to match the same pattern that occurred in the 2nd group.
Groups are indicated by open parenthesis '(', so the 2nd groups is the one that is used to find/match either an open single quote, or open double quote around the class name.  So either of these would match:

'XXX'
"XXX"

I hope that this makes sense.

Thanks for the grade and points.

Good luck & have a great day.

 

by: HonorGodPosted on 2009-09-27 at 06:30:28ID: 25433956

Can you explain to me the grade of B?

20120131-EE-VQP-002

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