beforeunload
事件来获取网页关闭与取消关闭的事件。当用户尝试关闭或刷新页面时,会触发该事件,可以通过绑定一个事件处理函数来实现相应的操作。XMLHttpRequest
和fetch
来监听所有Ajax请求。,,``javascript,(function(open) {, XMLHttpRequest.prototype.open = function(method, url, async, user, pass) {, this.addEventListener('load', function() {, console.log('Ajax request made: ' + method + ' ' + url);, }, false);, open.apply(this, arguments);, };,})(XMLHttpRequest.prototype.open);,,if (window.fetch) {, window.fetch = function() {, console.log('Ajax request made: ' + arguments[0]);, return originalFetch.apply(this, arguments);, };,},
``FACT(number)
,number是要计算阶乘的非负整数。
FACT(5)`返回120。html,,,,
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