Experimenting with escape characters has been a fascinating experience for me.
<img src="x" onerror=alert('hello'); />
<img src="x" onerror="alert(\"hello\")" />
The second code snippet triggers an illegal character error in the developer console. What is causing this issue? Why am I unable to utilize the escape character?
Check out the demonstration: http://jsfiddle.net/h7nnk/1/
Since the backslash character (\) does not serve as an escape character in HTML.
<img src="x" onerror="alert("hello")" />
Alternatively, following @mplungjan's suggestion:
<img src="x" onerror="alert('hello')" />
Even better approach would be:
<img src="x" id="derp" />
<script type="text/javascript">
document.getElementById('derp').addEventListener("error",function() {
alert('hello');
},false);
</script>
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