Removing the closing slash from the image tag when using innerHTML

This is quite peculiar. Take a look at this rapid testing function:

function test_function(){
    code = '<img src="http://www.myimage.com/img.jpg" alt="image" />';
    alert(code);
    document.getElementById('test').innerHTML = code;
    alert(document.getElementById('test').innerHTML);
}

If you run the code above, the first alert will display />, but the second alert will only show >. It seems that when using .innerHTML, the forward slash gets removed. Any suggestions on how to prevent this? I require the forward slash for validation purposes.

javascriptimagexhtmlinnerhtml

Answer №1

The secondary alert simply displays the browser's internal representation of the image element you have on your page. Remember, when it comes to validation, the lack of a slash is not an issue because validators focus on the source code of your page and do not interpret JavaScript that dynamically adds elements to the DOM.

Interestingly, most browsers treat XHTML in a similar fashion to HTML internally, rather than as an exact XML representation of your document. Only under certain circumstances, such as providing your XHTML document with the MIME-type application/xhtml+xml, will some browsers render the page using the XML parser.

To learn more about this topic, check out Ian Hickson's insightful article.

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