浏览器 console对象的兼容性包装和缓存化处理

console.js

// console.log/warn/error/info 均可用 
// console.log('ha', 'hi');

// console.show(false); //停止显示log

// console.save(true); //开始存储log

// logs = console.cache(); //获取log数组，并清空log缓存

window.console = (function (origConsole) {

    if (!window.console || !origConsole) {
        origConsole = {};
    }

    var isDebug = true, isSaveLog = false,
        logArray = {
            logs: [],
            errors: [],
            warns: [],
            infos: []
        };
  
    function showDate(){
      var date = new Date(),
        str = date.toTimeString();
      return str;
    }
  
  
    return {
        log: function () {
            [].unshift.call(arguments, `[${(new Date()).toTimeString()}]`);
            isDebug && origConsole.log && origConsole.log.apply(origConsole, arguments);
            this.addLog(arguments, "logs");
        },
        warn: function () {
            [].unshift.call(arguments, `[${(new Date()).toTimeString()}]`);
            isDebug && origConsole.warn && origConsole.warn.apply(origConsole, arguments);
            this.addLog(arguments, "errors");
        },
        error: function () {
            [].unshift.call(arguments, `[${(new Date()).toTimeString()}]`);
            isDebug && origConsole.error && origConsole.error.apply(origConsole, arguments);
            this.addLog(arguments, "warns");
        },
        info: function (v) {
            [].unshift.call(arguments, `[${(new Date()).toTimeString()}]`);
            isDebug && origConsole.info && origConsole.info.apply(origConsole, arguments);
            this.addLog(arguments, "infos");
        },
        show: function (bool) {
            isDebug = bool;
        },
        save: function (bool) {
            isSaveLog = bool;
        },
        addLog: function (arguments, array) {
            if (!isSaveLog) {
                return;
            }
            logArray[array || "logs"].push([].join.call(arguments, ' '));
        },
        cache: function () {
            var old = logArray;
            logArray = {};
            return old;
        }
    };

}(window.console));