將載入Google Plus One的JavaScript改寫成非同步載入寫法

原有的 Google Plus One (G+) 的同步載入 JavaScript 寫法假設是:

<script type=”text/javascript” src=”https://apis.google.com/js/plusone.js”>
{lang: ‘zh-TW’}
</script>

改寫成非同步載入寫法後變成這樣:

<script type=”text/javascript”>
window.___gcfg = {lang: ‘zh-TW’};
(function() {
var po = document.createElement(‘script’); po.type = ‘text/javascript’; po.async = true;
po.src = ‘https://apis.google.com/js/plusone.js’;
var s = document.getElementsByTagName(‘script’)[0]; s.parentNode.insertBefore(po, s);
})();
</script>

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