我写了一个ES2015解决方案(仅用于Webpack)。

class logger {
  static isEnabled = true;

  static enable () {
    if(this.constructor.isEnabled === true){ return; }

    this.constructor.isEnabled = true;
  }

  static disable () {
    if(this.constructor.isEnabled === false){ return; }

    this.constructor.isEnabled = false;
  }

  static log () {
    if(this.constructor.isEnabled === false ) { return; }

    const copy = [].slice.call(arguments);

    window['console']['log'].apply(this, copy);
  }

  static warn () {
    if(this.constructor.isEnabled === false ) { return; }

    const copy = [].slice.call(arguments);

    window['console']['warn'].apply(this, copy);
  }

  static error () {
    if(this.constructor.isEnabled === false ) { return; }

    const copy = [].slice.call(arguments);

    window['console']['error'].apply(this, copy);
  }
}

描述:

Along with logger.enable and logger.disable you can use console.['log','warn','error'] methods as well using logger class. By using logger class for displaying, enabling or disabling messages makes the code much cleaner and maintainable. The code below shows you how to use the logger class: logger.disable() - disable all console messages logger.enable() - enable all console messages logger.log('message1', 'message2') - works exactly like console.log. logger.warn('message1', 'message2') - works exactly like console.warn. logger.error('message1', 'message2') - works exactly like console.error. Happy coding..

这是来自SolutionYogi和Chris s的答案的混合。它维护console.log行号和文件名。jsFiddle示例。

// Avoid global functions via a self calling anonymous one (uses jQuery)
(function(MYAPP, $, undefined) {
    // Prevent errors in browsers without console.log
    if (!window.console) window.console = {};
    if (!window.console.log) window.console.log = function(){};

    //Private var
    var console_log = console.log;  

    //Public methods
    MYAPP.enableLog = function enableLogger() { console.log = console_log; };   
    MYAPP.disableLog = function disableLogger() { console.log = function() {}; };

}(window.MYAPP = window.MYAPP || {}, jQuery));


// Example Usage:
$(function() {    
    MYAPP.disableLog();    
    console.log('this should not show');

    MYAPP.enableLog();
    console.log('This will show');
});

据我从文档中得知，Firebug没有提供任何变量来切换调试状态。相反，将console.log()包装在一个有条件地调用它的包装器中，即:

DEBUG = true; // set to false to disable debugging
function debug_log() {
    if ( DEBUG ) {
        console.log.apply(this, arguments);
    }
}

为了不需要改变所有现有的调用，你可以使用这个代替:

DEBUG = true; // set to false to disable debugging
old_console_log = console.log;
console.log = function() {
    if ( DEBUG ) {
        old_console_log.apply(this, arguments);
    }
}

令我惊讶的是，在所有这些答案中，没有人把它们结合起来:

没有jquery 匿名函数不污染全局命名空间 窗口的句柄情况。控制台未定义 只需修改控制台的.log函数

我会选这个:

(function () {

    var debug = false

    if (debug === false) {
        if ( typeof(window.console) === 'undefined') { window.console = {}; }
        window.console.log = function () {};
    }
})()

只需更改标志DEBUG以覆盖console.log函数。这应该能奏效。

var DEBUG = false;
// ENABLE/DISABLE Console Logs
if(!DEBUG){
  console.log = function() {}
}

console.log('pre');
/* pre content */ 
// define a new console
let preconsole = Object.assign({}, window.console);
let aftconsole = Object.assign({}, window.console, {
    log: function(text){
        preconsole.log(text);
        preconsole.log('log');
    }
});
console = aftconsole;
/* content */

console.log('content');

/* end of content */
console = preconsole;
console.log('aft');