Question

99

String problems with Javascript double quotes inside single

rated 0 times [ 103] [ 4] / answers: 1 / hits: 17230 / 13 Years ago, tue, may 10, 2011, 12:00:00

This is my code:

<script>

    function popupTest(title) {

        alert(title);

        return false;

    }

</script>



<a href= onclick=return popupTest('This is &#039;some&#039; &quot;test&quot; string')><span>Recommend</span></a>

Using Firefox 4 I get the error:

Error: missing ) after argument list

Source Code:

return popupTest('This is 'some' test string')

It's like it's decoding the HTML entities but I don't know why.

Have also tried...

<a href= onclick=return popupTest('This is 'some' test string')><span>Recommend</span></a>

Which gives error:

Error: unterminated string literal

Source Code:

return popupTest('This is 'some'

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bryonk

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answered 13 Years ago emanir · Accepted Answer

' is HTML for '. So for the first example the HTML is parsed and the JavaScript engine is passed:

return popupTest('This is 'some' test string')

… and the second ' terminates the string.

On the other hand:

onclick=return popupTest('This is 'some' test string')

Is parsed as:

An onclick attribute with the value return popupTest('This is 'some' followed by some invalid data.

You need to deal with the JavaScript first:

return popupTest('This is 'some' test string')

and then escape it for HTML:

onclick=return popupTest('This is 'some' &quot;test&quot; string')

You would probably be better off using unobtrusive JavaScript and binding the event handlers with JavaScript instead of using intrinsic event attributes.