CODEWITHSUNDEEP
javascriptjqueryhtml
stack
stack

Reputation: 10228

How can I remove tags which have at least one attribute except except specific attributes?

I have a textarea which my website's users enter their own content in it (based on markdown standards) and then publish it in my website.

The library I use (which converts markdown to HTML per keydown) produces tags without attributes. So to keep safe the UI against what the user enters, I have this code:

function cleanHtml(html) {
    var $doc = $('<span>' + html + '</span>');
    $('*', $doc).each(function (index, el) {
        if (el.hasAttributes('attributes')) {
            while ($(el).contents().length) {
                $(el).contents().last().insertAfter(el);
            }
            $(el).remove();
        }
    });
    return $doc.html();
}

The Code above removes every tag which has at least one attribute. This works fine.

Recently I figured out the markdown-converter-library also produces some tags which have either the href attribute or both src and alt attributes. Something like these:

<a href="../path">my link</a>
<img src="../path" alt="something" />

Now I need to edit cleanHtml() function to remove every tag which has attributes except the two examples above.

How can I do that?

Upvotes: 0

Views: 46

Answers (1)

Adam Azad
Adam Azad

Reputation: 11297

Check if $(el).attr('src') or $(el).attr('src') return undefined: 

el.hasAttributes('attributes') && ( !$(el).attr('src') && !$(el).attr('href') )


$('*').each(function(i, el){
    if(el.hasAttributes('attributes') && ( !$(el).attr('src') && !$(el).attr('href') )  ) {
      $(el).remove();
   } 
});
p {
   width:100px;
   height:100px;
   background:#ddd;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<a href="http://unsplash.it" style="color:#f44336">my link</a>
<a href="http://unsplash.it" style="color:#f44336;size:16px">Unsplash 2</a>
<img src="http://unsplash.it/100" alt="something" />
<p id="s" data-a="a"></p>

Upvotes: 1

Related Questions