panlippt
Version:
运行在浏览器中的ppt 演示框架
78 lines (77 loc) • 2.49 kB
JavaScript
/**
* 加载js
* @param {String} src 路径
* @param {Function} callback 回调函数
* @param {Object} attrs attribute对象
* @param {Number} timeout 超时时间
* @param {Function} error 出错函数
* @param {Function} complete 完成函数，出错和load都执行的
* @return {Object} this
*/
function loadJS(src, callback, attrs, timeout, fail, complete) {
if ($.isObject(src)) {
callback = src.callback;
attrs = src.attrs;
timeout = src.timeout;
fail = src.fail;
complete = src.complete;
src = src.src;
return loadJS(src, callback, attrs, timeout, fail, complete);
}
var script = document.createElement('script');
var done = false;
if ($.isObject(attrs)) {
for (var i in attrs) {
script.setAttribute(i, attrs[i]);
}
}
var urls = getPath(src);
src = script.src = urls[0].replace('//', '/');
script.async = true;
script.type = 'text/javascript';
script.charset = defaultConfig.charset;
complete = $.isFunction(complete) ? complete : emptyFn;
script.onload = script.onreadystatechange = function(e) {
e = e || cleanObj
if (!done && (e.type === 'load' || /loaded|complete|undefined/.test(script.readyState))) {
done = true;
removeNode(script);
mapLoaded[src] = 'loaded';
$.isFunction(callback) && callback();
complete('load');
}
};
script.onerror = function() {
done = true;
mapLoaded[src] = 'error';
$.isFunction(fail) && fail();
complete('error');
};
timeout = $.isNumber(timeout) ? timeout : defaultConfig.timeout;
if (timeout) {
setTimeout(function() {
if (!done) {
done = true;
mapLoaded[src] = 'timeout';
complete('timeout');
}
}, timeout);
}
mapLoaded[src] = 'pending';
head.insertBefore(script, base);
return _;
}
/**
* 移出node节点，释放内存
* @param {Element} node 节点
*/
function removeNode(node) {
//确保执行一次+内存回收
node.onload = node.onerror = node.onreadystatechange = null;
if (node.parentNode) {
setTimeout(function() {
node.parentNode.removeChild(node);
node = null;
}, 0);
}
}