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jugglinmike (4) [Avatar] Offline
Another method of passing arguments to the script is using "data-" attributes. In terms of the example in 2.5, it would look like this:

var script = document.createElement('script');

script.type = 'text/javascript';
script.async = true;
script.src = '';
script.setAttribute('data-product', '1234');

Although this approach yields behavior identical to using a fragment identifier, it also precludes the need for the regular expressions in the included script:

function getScriptElement() {
var scripts = document.getElementsByTagName('script'),
for (var i = 0; i < scripts.length; i++) {
element = scripts[ i ];

src = element.getAttribute ?
element.getAttribute('src') : el.src;
if (src && / {
return element;
return null;

var script = getScriptElement();
var productId = script.getAttribute('data-product');

This approach seems preferable to using a fragment identifying because
- It seems to be faster
--- Both in the single case:
--- And scaling:
- It "jives" better semantically
- It doesn't require data be URI encoded

Do you know of any drawbacks to this approach?
benvinegar (68) [Avatar] Offline
Re: Script Arguments with data- Attributes
Hi Mike,

No, there's no downsides (afaik). I was going to include it in this section, but thought it was slightly redundant because the code is 95% the same. But it deserves at least a passing mention.

- Ben
benvinegar (68) [Avatar] Offline
Re: Script Arguments with data- Attributes
Hey Mike,

Just a heads up that the next update to the MEAP has this section.

- Ben