Using java regex to find img tags without a width or height attribute

Question

What would be the regular expression for finding img tags without a width or height attribute? I have tried regex <img(?!.*width).*?> for width and <img(?!.*height).*?> for height .

Will it works without conflict and what is the combination of both regex ?

Ermm just put | (logical or) between them? Like: <img(?!.*width).*?>|<img(?!.*height).*?>. Not to mention you shouldn't parse HTML with regex. — Tafari
– Tafari, Commented Nov 25, 2013 at 10:09
yes, there are quite a good number of css parsers. You may want to check out this - stackoverflow.com/questions/1513587/… — Indu Devanath
– Indu Devanath, Commented Nov 25, 2013 at 23:18

Stephan · Accepted Answer · 2013-11-25 17:03:42Z

1

Solution

Since you are using Java, here is a simple example for matching img tags without a width or height attribute. I used the Jsoup html parser:

Document doc = Jsoup.parse(myHtmlCode).get();
Elements imgsWithoutHeighOrWidth = doc.select("img:not(img[height], img[width])");

Demo

http://try.jsoup.org/~z1zP_fkmQPOi4Nbj87omMgbDbr0

Explanation

The big part here is the cssQuery passed to the select method.

I asked it to find:

img               => any img tags
   :not(          => not in 
      img[height] =>   any img tags with an `height` tag
      ,           =>   or
      img[width]  =>   any img tags with a `width` tag
   )

edited Nov 25, 2013 at 17:03

answered Nov 25, 2013 at 16:56

Stephan

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2 Comments

hiddenuser Over a year ago

Thank Alex for your response , Is there a way to retrieve <img> tag start line & column number and end line & column number ? Because i need to highlight <img> tag (without width/height) in my own html editor .

Stephan Over a year ago

@user2998596 I don't jnow how to do that. However, you can use the .html() method of an Element for getting the position of this element inside myHtmlCode. Checl Jsoup javaodc for more help: jsoup.org/apidocs

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