如何实现一个基于JSONP的缓冲式加载器？

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javascriptfunction bufferedLoader(eleLoaded, loader, callback) { // 1. eleLoaded(index) // 2. loader(start, end) // HELP: loader的回调函数将丰富store，除非通过bufferedLoader的检查，否则它将递归}

jsonp-buffered-loader

bufferedLoader = function (eleLoaded, loader, callback) { /* 1. eleLoaded (index) 2. loader (start, end) HELP: the loader's callback func will enrich store, and unless passes the checking of bufferedLoader, it will recursively call the bufferedLoader. e.g. loaderCallback (data) { ... fn(i, end) } NOTE: if there is somehow a terminating condition, you can place it in the loader/loaderCallback, and manually excute the callback func above. 3. callback - when all of the data is ready 1. eleLoaded (index) 判断每个数据是不是已经加载到了 2. loader (start, end) 迭代加载尚未加载的数据，当有一部分数据还没有加载的话 3. callback () 当所有需要的数据都已经加载到了，才会执行要执行的操作 */ var fn = function (start, end) { for (var i = start; i < end; i++) { if (!eleLoaded(i)) { loader(i, end); return; } } callback(); }; return fn; };