javascript 如何覆盖 console.log() 并在输出的开头附加一个单词？

how can I override console.log() and append a word at the beginning of the output?

提问by Uuid

I have the function Log which prints data along with passed arguments, how can I print the content & at the same time always print the word "Report: " at the beggining of the log.

我有函数 Log 打印数据和传递的参数，我如何打印内容&同时总是在日志的开头打印“报告：”这个词。

function Log(){
    if (app.debug_logs){
        if(console && console.log){
            console.log.apply(console, "Report: " + arguments);
        }
    }
}

Log(" error ocurred ", " on this log... ");

I want to have: "Report: error ocurred on this log..."

我想要：“报告：此日志上发生错误......”

Thanks.

谢谢。

回答by Arun P Johny

You can override the console.logeasily

您可以console.log轻松覆盖

(function(){
    if(window.console && console.log){
        var old = console.log;
        console.log = function(){
            Array.prototype.unshift.call(arguments, 'Report: ');
            old.apply(this, arguments)
        }
    }  
})();

console.log('test')

Demo: Fiddle

演示：小提琴