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67 lines
2.4 KiB
67 lines
2.4 KiB
8 years ago
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window.BI = window.BI || {};
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$.extend(BI, {
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$defaultImport: function (options) {
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var config = $.extend({
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op: 'resource',
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path: null,
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type: null,
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must: false
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}, options);
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config.url = FR.servletURL + '?op=' + config.op + '&resource=' + config.path;
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this.$import(config.url, config.type,config.must);
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},
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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 = $("head script");
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$.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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// 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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});
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