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Loading multiple 3rd party widgets asynchronously
(function() {
var script,
scripts = document.getElementsByTagName('script')[0];
function load(url) {
script = document.createElement('script');
script.async = true;
script.src = url;
scripts.parentNode.insertBefore(script, scripts);
}
load('//apis.google.com/js/plusone.js');
load('//platform.twitter.com/widgets.js');
load('//s.widgetsite.com/widget.js');
}());
@mgoulart
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mgoulart commented Mar 14, 2013

If there's no previous script tag on the page, won't scripts.parentNode throw a (Cannot read property parentNode of undefined) error ?

also any for in loop should use hasOwnProperty to protect for any prototype modifications on the page.

@zenorocha
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zenorocha commented Mar 14, 2013

  1. You're always going to have a script tag on the page, because you need to add the script above somehow

@mgoulart
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mgoulart commented Mar 14, 2013

Very true! Good point =)

You also might want to wrap this in a function to protect the variable namespaces.

@eduardo-matos
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eduardo-matos commented Mar 14, 2013

As you don't use the object keys, maybe it would be better to loop an array instead (performance).

@wesleyvicthor
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wesleyvicthor commented Mar 14, 2013

common approach.

@zenorocha
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zenorocha commented Mar 15, 2013

How about now?

@harry1989
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harry1989 commented Mar 20, 2013

Shouldn't

}());

be

})(); ?

@thefrontender
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thefrontender commented Mar 21, 2013

@harry1989 Both are valid Javascript. But if you want an opinionated answer, try Crockford http://www.youtube.com/watch?v=taaEzHI9xyY&feature=youtu.be#t=33m39s

@jswebschmiede
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jswebschmiede commented Mar 27, 2013

i use a window onload version. look https://gist.github.com/jswebschmiede/3660918

@coljung
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coljung commented Mar 30, 2013

Similar to this one: https://gist.github.com/necolas/1025811 , although i find that one much better.

@franklinjavier
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franklinjavier commented May 13, 2013

How about to pass the "document" as parameter into scope?

@mingyun
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mingyun commented Nov 9, 2013

good

@3runoDesign
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3runoDesign commented Dec 20, 2013

goood

@kimmykuang
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kimmykuang commented Dec 11, 2014

i think pass 'document' into scope is better

@fer-ri
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fer-ri commented May 15, 2015

Nice 👍

@PokemonAshLovesMyTurkeyAndILikeYouTwo

ty babe

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