JavaChatRoom项目练习的几个问题

来源：互联网发布：商业数据分析编辑：程序博客网时间：2024/05/23 14:19

/* window._console = window.console;//将原始console对象缓存
window.console = (function (orgConsole) {
return {//构造的新console对象
log: getConsoleFn("log"),
debug: getConsoleFn("debug"),
info: getConsoleFn("info"),
warn: getConsoleFn("warn"),
exception: getConsoleFn("exception"),
assert: getConsoleFn("assert"),
dir: getConsoleFn("dir"),
dirxml: getConsoleFn("dirxml"),
trace: getConsoleFn("trace"),
group: getConsoleFn("group"),
groupCollapsed: getConsoleFn("groupCollapsed"),
groupEnd: getConsoleFn("groupEnd"),
profile: getConsoleFn("profile"),
profileEnd: getConsoleFn("profileEnd"),
count: getConsoleFn("count"),
clear: getConsoleFn("clear"),
time: getConsoleFn("time"),
timeEnd: getConsoleFn("timeEnd"),
timeStamp: getConsoleFn("timeStamp"),
table: getConsoleFn("table"),
error: getConsoleFn("error"),
memory: getConsoleFn("memory"),
markTimeline: getConsoleFn("markTimeline"),
timeline: getConsoleFn("timeline"),
timelineEnd: getConsoleFn("timelineEnd")
};
function getConsoleFn(name) {
return function actionConsole() {
if (typeof (orgConsole) !== "object") return;
if (typeof (orgConsole[name]) !== "function") return;//判断原始console对象中是否含有此方法，若没有则直接返回
return orgConsole[name].apply(orgConsole, Array.prototype.slice.call(arguments));//调用原始函数
};
}
}(window._console)); */

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