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55 lines
2.1 KiB
55 lines
2.1 KiB
_.extend(BI, { |
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$import: function () { |
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var _LOADED = {}; // alex:保存加载过的 |
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function loadReady (src, must) { |
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var $scripts = $("head script, body script"); |
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$.each($scripts, function (i, item) { |
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if (item.src.indexOf(src) != -1) { |
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_LOADED[src] = true; |
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} |
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}); |
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var $links = $("head link"); |
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$.each($links, function (i, item) { |
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if (item.href.indexOf(src) != -1 && must) { |
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_LOADED[src] = false; |
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$(item).remove(); |
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} |
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}); |
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} |
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|
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// must=true 强行加载 |
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return function (src, ext, must) { |
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loadReady(src, must); |
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// alex:如果已经加载过了的,直接return |
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if (_LOADED[src] === true) { |
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return; |
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} |
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if (ext === "css") { |
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var link = document.createElement("link"); |
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link.rel = "stylesheet"; |
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link.type = "text/css"; |
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link.href = src; |
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var head = document.getElementsByTagName("head")[0]; |
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head.appendChild(link); |
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_LOADED[src] = true; |
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} else { |
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// alex:这里用同步调用的方式,必须等待ajax完成 |
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$.ajax({ |
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url: src, |
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dataType: "script", // alex:指定dataType为script,jquery会帮忙做globalEval的事情 |
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async: false, |
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cache: true, |
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complete: function (res, status) { |
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/* |
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* alex:发现jquery会很智能地判断一下返回的数据类型是不是script,然后做一个globalEval |
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* 所以当status为success时就不需要再把其中的内容加到script里面去了 |
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*/ |
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if (status == "success") { |
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_LOADED[src] = true; |
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} |
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} |
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}); |
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} |
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}; |
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}() |
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}); |