禁用console.log:

console.log = function() {};

禁用所有写入控制台的功能。

for (let func in console) {
   console[func] = function() {};
}

我知道你问如何禁用console.log，但这可能是你真正想要的。这样就不必显式地启用或禁用控制台。它只是为那些没有打开或安装它的人防止那些讨厌的控制台错误。

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

在脚本中重新定义console.log函数。

console.log = function() {}

够了，不再给控制台发消息了。

编辑:

扩展了Cide的想法。一个自定义记录器，您可以使用它从代码中切换登录。

从我的Firefox控制台:

var logger = function()
{
    var oldConsoleLog = null;
    var pub = {};

    pub.enableLogger =  function enableLogger() 
                        {
                            if(oldConsoleLog == null)
                                return;

                            window['console']['log'] = oldConsoleLog;
                        };

    pub.disableLogger = function disableLogger()
                        {
                            oldConsoleLog = console.log;
                            window['console']['log'] = function() {};
                        };

    return pub;
}();

$(document).ready(
    function()
    {
        console.log('hello');

        logger.disableLogger();
        console.log('hi', 'hiya');
        console.log('this wont show up in console');

        logger.enableLogger();
        console.log('This will show up!');
    }
 );

如何使用上面的“记录器”?在就绪事件中，调用记录器。disableLogger使控制台消息不被记录。向记录器添加调用。enabllogger和logger。在希望将消息记录到控制台的方法中的disableLogger。

嘿~让我们用现代的2022方式来做~

ES6中引入了代理和反射。这些是我们正在寻找的工具，使console.log被条件“禁用”。

在传统的方法中，你必须创建另一个函数，像这样:

    let console_disabled = true;

    function console_log() {
      if (!console_disabled) {
        console.log.apply(console, arguments); //Dev Tools will mark the coding line here
      }
    }

但是，这将创建另一个函数，并且您无法使用Dev Tools中显示的编码行记录消息。

这就是2022年之路。

// Disable Console Log without altering debug coding line. // No override original `console` object let console_disabled = false; const nullFunc = function(){}; const _console = new Proxy(console, { get(target, prop, receiver){ if(prop==='log' && console_disabled){ return nullFunc; } return Reflect.get(...arguments) } }); console_disabled = true; _console.log('you cannot see me'); console_disabled = false; _console.log('you can see me @ line 18'); console_disabled = true; _console.log('you cannot see me'); console_disabled = false; _console.log('you can see me @ line 22');

您还可以重写原来的控制台对象。

// Disable Console Log without altering debug coding line. // Override original `console` object let console_disabled = false; const nullFunc = function(){}; console = new Proxy(console, { get(target, prop, receiver){ if(prop==='log' && console_disabled){ return nullFunc; } return Reflect.get(...arguments) } }); console_disabled = true; console.log('you cannot see me'); console_disabled = false; console.log('you can see me @ line 18'); console_disabled = true; console.log('you cannot see me'); console_disabled = false; console.log('you can see me @ line 22');

有关代理和反射的详细信息， 请访问https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy

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');

当使用React时，你可以利用钩子来管理它，这样它就被限制在你的组件范围内

import { useEffect, useRef } from "react";

type LoggingReplacements = {
  debug?: typeof console["debug"];
  error?: typeof console["error"];
  info?: typeof console["info"];
  log?: typeof console["log"];
  warn?: typeof console["warn"];
};
/**
 * This replaces console.XXX loggers with custom implementations.  It will restore console log on unmount of the component.
 * @param replacements a map of replacement loggers.  They're all optional and only the functions defined will be replaced.
 */
export function useReplaceLogging({
  debug,
  error,
  info,
  log,
  warn,
}: LoggingReplacements): void {
  const originalConsoleDebug = useRef(console.debug);
  const originalConsoleError = useRef(console.error);
  const originalConsoleInfo = useRef(console.info);
  const originalConsoleLog = useRef(console.log);
  const originalConsoleWarn = useRef(console.warn);
  if (debug) {
    console.debug = debug;
  }
  if (error) {
    console.error = error;
  }
  if (info) {
    console.info = info;
  }
  if (log) {
    console.log = log;
  }
  if (warn) {
    console.warn = warn;
  }
  useEffect(() => {
    return function restoreConsoleLog() {
      console.debug = originalConsoleDebug.current;
      console.error = originalConsoleError.current;
      console.info = originalConsoleInfo.current;
      console.log = originalConsoleLog.current;
      console.warn = originalConsoleWarn.current;
    };
  }, []);
}

在https://github.com/trajano/react-hooks/tree/master/src/useReplaceLogging上编写测试代码