扩展了JSmyth中“带格式字符串”的解决方案

所有其他console.log变量(log,debug,info,warn,error) 包括时间戳字符串灵活性参数(例如:09:05:11.518 vs. 2018-06-13T09:05:11.518Z) 包括回退，以防浏览器中不存在控制台或其功能

.

var Utl = {

consoleFallback : function() {

    if (console == undefined) {
        console = {
            log : function() {},
            debug : function() {},
            info : function() {},
            warn : function() {},
            error : function() {}
        };
    }
    if (console.debug == undefined) { // IE workaround
        console.debug = function() {
            console.info( 'DEBUG: ', arguments );
        }
    }
},


/** based on timestamp logging: from: https://stackoverflow.com/a/13278323/1915920 */
consoleWithTimestamps : function( getDateFunc = function(){ return new Date().toJSON() } ) {

    console.logCopy = console.log.bind(console)
    console.log = function() {
        var timestamp = getDateFunc()
        if (arguments.length) {
            var args = Array.prototype.slice.call(arguments, 0)
            if (typeof arguments[0] === "string") {
                args[0] = "%o: " + arguments[0]
                args.splice(1, 0, timestamp)
                this.logCopy.apply(this, args)
            } else this.logCopy(timestamp, args)
        }
    }
    console.debugCopy = console.debug.bind(console)
    console.debug = function() {
        var timestamp = getDateFunc()
        if (arguments.length) {
            var args = Array.prototype.slice.call(arguments, 0)
            if (typeof arguments[0] === "string") {
                args[0] = "%o: " + arguments[0]
                args.splice(1, 0, timestamp)
                this.debugCopy.apply(this, args)
            } else this.debugCopy(timestamp, args)
        }
    }
    console.infoCopy = console.info.bind(console)
    console.info = function() {
        var timestamp = getDateFunc()
        if (arguments.length) {
            var args = Array.prototype.slice.call(arguments, 0)
            if (typeof arguments[0] === "string") {
                args[0] = "%o: " + arguments[0]
                args.splice(1, 0, timestamp)
                this.infoCopy.apply(this, args)
            } else this.infoCopy(timestamp, args)
        }
    }
    console.warnCopy = console.warn.bind(console)
    console.warn = function() {
        var timestamp = getDateFunc()
        if (arguments.length) {
            var args = Array.prototype.slice.call(arguments, 0)
            if (typeof arguments[0] === "string") {
                args[0] = "%o: " + arguments[0]
                args.splice(1, 0, timestamp)
                this.warnCopy.apply(this, args)
            } else this.warnCopy(timestamp, args)
        }
    }
    console.errorCopy = console.error.bind(console)
    console.error = function() {
        var timestamp = getDateFunc()
        if (arguments.length) {
            var args = Array.prototype.slice.call(arguments, 0)
            if (typeof arguments[0] === "string") {
                args[0] = "%o: " + arguments[0]
                args.splice(1, 0, timestamp)
                this.errorCopy.apply(this, args)
            } else this.errorCopy(timestamp, args)
        }
    }
}
}  // Utl

Utl.consoleFallback()
//Utl.consoleWithTimestamps()  // defaults to e.g. '2018-06-13T09:05:11.518Z'
Utl.consoleWithTimestamps( function(){ return new Date().toJSON().replace( /^.+T(.+)Z.*$/, '$1' ) } )  // e.g. '09:05:11.518'

我使用Array.prototype.slice将参数转换为Array，这样我就可以连接到我想添加的另一个Array，然后将它传递到console.log。应用(控制台,/ * * /);

var log = function () {
    return console.log.apply(
        console,
        ['['+new Date().toISOString().slice(11,-5)+']'].concat(
            Array.prototype.slice.call(arguments)
        )
    );
};
log(['foo']); // [18:13:17] ["foo"]

似乎参数也可以是array .prototype. unmoved，但我不知道这样修改是否是个好主意/会有其他副作用

var log = function () {
    Array.prototype.unshift.call(
        arguments,
        '['+new Date().toISOString().slice(11,-5)+']'
    );
    return console.log.apply(console, arguments);
};
log(['foo']); // [18:13:39] ["foo"]

试试这个:

console.logCopy = console.log.bind(console);

console.log = function(data)
{
    var currentDate = '[' + new Date().toUTCString() + '] ';
    this.logCopy(currentDate, data);
};

或者这样，如果你想要一个时间戳:

console.logCopy = console.log.bind(console);

console.log = function(data)
{
    var timestamp = '[' + Date.now() + '] ';
    this.logCopy(timestamp, data);
};

以一种很好的方式(如对象树表示)记录多个事物:

console.logCopy = console.log.bind(console);

console.log = function()
{
    if (arguments.length)
    {
        var timestamp = '[' + Date.now() + '] ';
        this.logCopy(timestamp, arguments);
    }
};

带格式字符串(JSFiddle)

console.logCopy = console.log.bind(console);

console.log = function()
{
    // Timestamp to prepend
    var timestamp = new Date().toJSON();

    if (arguments.length)
    {
        // True array copy so we can call .splice()
        var args = Array.prototype.slice.call(arguments, 0);

        // If there is a format string then... it must
        // be a string
        if (typeof arguments[0] === "string")
        {
            // Prepend timestamp to the (possibly format) string
            args[0] = "%o: " + arguments[0];

            // Insert the timestamp where it has to be
            args.splice(1, 0, timestamp);

            // Log the whole array
            this.logCopy.apply(this, args);
        }
        else
        { 
            // "Normal" log
            this.logCopy(timestamp, args);
        }
    }
};

输出:

附注:仅在Chrome中测试。

array .prototype.slice在这里并不完美，因为它将被记录为对象的数组，而不是对象的一系列。

Chrome版本89.0.4389.90 (19.03.2021)

按F12。 找到并按齿轮图标。 检查显示时间戳。

+new Date和Date.now()是获取时间戳的替代方法

也试试这个:

this.log = console.log.bind( console, '[' + new Date().toUTCString() + ']' );

该函数将时间戳、文件名和行号与内置console.log相同。