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');

在其他答案的基础上，我个人希望只关闭代码的特定部分(ES6模块，但简单的单独脚本也可以)。

// old console to restore functionality
const consoleHolder = window.console;

// arbitrary strings, for which the console stays on (files which you aim to debug)
const debuggedHandlers = ["someScript", "anotherScript"];

// get console methods and create a dummy with all of them empty
const consoleMethodKeys = Object.getOwnPropertyNames(window.console).filter(item => typeof window.console[item] === 'function');
const consoleDummy = {};
consoleMethodKeys.forEach(method => consoleDummy[method] = () => {});

export function enableConsoleRedirect(handler) {
  if (!debuggedHandlers.includes(handler)) {
    window.console = consoleDummy;
  }
}

export function disableConsoleRedirect() {
  window.console = consoleHolder;
}

然后，只需将这个模块导入到您希望能够切换调试模式的任何文件中，在文件顶部调用enable函数，在底部调用disable函数。

如果希望在简单脚本中使用它，可能需要将顶部包装在匿名函数中和/或稍微重新组织它，以最大限度地减少名称空间污染。

此外，你可能想要只使用true/false而不是字符串处理程序，并在当前使用的文件中切换调试模式。

如果你使用IE7，控制台将不会被定义。所以一个更IE友好的版本是:

if (typeof console == "undefined" || typeof console.log == "undefined") 
{
   var console = { log: function() {} }; 
}

我认为2020年最简单、最容易理解的方法是创建一个像log()这样的全局函数，你可以选择以下方法之一:

const debugging = true;

function log(toLog) {
  if (debugging) {
    console.log(toLog);
  }
}

function log(toLog) {
  if (true) { // You could manually change it (Annoying, though)
    console.log(toLog);
  }
}

你可以说这些功能的缺点是:

您仍然在运行时调用函数 您必须记住在第二个选项中更改调试变量或if语句 您需要确保在加载所有其他文件之前加载了该函数

And my retorts to these statements is that this is the only method that won't completely remove the console or console.log function which I think is bad programming because other developers who are working on the website would have to realize that you ignorantly removed them. Also, you can't edit JavaScript source code in JavaScript, so if you really want something to just wipe all of those from the code you could use a minifier that minifies your code and removes all console.logs. Now, the choice is yours, what will you do?

我在这个url中找到了一段更高级的代码。

var DEBUG_MODE = true; // Set this value to false for production

if(typeof(console) === 'undefined') {
   console = {}
}

if(!DEBUG_MODE || typeof(console.log) === 'undefined') {
   // FYI: Firebug might get cranky...
   console.log = console.error = console.info = console.debug = console.warn = console.trace = console.dir = console.dirxml = console.group = console.groupEnd = console.time =    console.timeEnd = console.assert = console.profile = function() {};
}

如果你正在使用gulp，那么你可以使用这个插件:

使用下面的命令安装这个插件: NPM安装gulp-remove-logging 接下来，将这一行添加到gulpfile中: Var gulp_remove_logging = require("gulp-remove-logging"); 最后，将配置设置(见下文)添加到gulpfile中。 任务配置 饮而尽。任务("remove_logging"，函数(){ 返回gulp.src (" src / javascript / * * / * . js”) .pipe ( gulp_remove_logging () ） .pipe ( gulp.dest ( “构建/ javascript /” ） ）; })；