Disabling the use of console.log() in a live environment

Question

Disabling the use of console.log() in a live environment

In an effort to disable console logs for production environments in my angular application, I implemented the code below. While it successfully suppresses logs in Chrome, IE 11 continues to display them.

Here is the snippet from main.ts:

if (environment.production) {
  enableProdMode();
if(window){
  window.console.log=function(){};
 }
}

I'm wondering if this issue could be related to a polyfill problem. There doesn't seem to be any information available online regarding this specific discrepancy.

UPDATE:

This question appears similar, but does not offer insight into why overriding the console log function with an empty method functions in Chrome but not in IE 11.

typescript internet-explorer angular5 angular-cli

Answer 1

Answer №1

The answer to the question has been provided and accepted, but there is a more efficient way to disable or switch off console.log in a production environment. Within the src/envirenmonts directory, create an environment.ts file with the following content:

export const environment = {
  production: false,

  mode: 'Dev'
}

In the main.ts file, import the envirenmont constant:

import './polyfills';
...
import { environment } from './environments/environment';

Next, include the following code snippet:

..

if (environment.production) {
      window.console.log = () => { }
}

platformBrowserDynamic().bootstrapModule(AppModule).then(ref => {
  ...
}).catch(err => console.error(err));

To test this out, add a console.log statement in the constructor of the app.component.ts:

...
@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent  {
  ...
  constructor() {    
    console.log('How to turn off logging in Production?')
  }
}

Toggle the value of environment.production between true/false to observe the outcome. Here is a functional example on StackBlitz.

Answer 2

The answer to the question has been provided and accepted, but there is a more efficient way to disable or switch off console.log in a production environment. Within the src/envirenmonts directory, create an environment.ts file with the following content:

export const environment = {
  production: false,

  mode: 'Dev'
}

In the main.ts file, import the envirenmont constant:

import './polyfills';
...
import { environment } from './environments/environment';

Next, include the following code snippet:

..

if (environment.production) {
      window.console.log = () => { }
}

platformBrowserDynamic().bootstrapModule(AppModule).then(ref => {
  ...
}).catch(err => console.error(err));

To test this out, add a console.log statement in the constructor of the app.component.ts:

...
@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent  {
  ...
  constructor() {    
    console.log('How to turn off logging in Production?')
  }
}

Toggle the value of environment.production between true/false to observe the outcome. Here is a functional example on StackBlitz.

Answer 3

Answer №2

To resolve the issue, include the polyfill in your polyfill.ts file

if(!window.console) {
 var console = {
  log : function(){},
  warn : function(){},
  error : function(){},
  time : function(){},
  timeEnd : function(){}
 }
}

Answer 4

To resolve the issue, include the polyfill in your polyfill.ts file

if(!window.console) {
 var console = {
  log : function(){},
  warn : function(){},
  error : function(){},
  time : function(){},
  timeEnd : function(){}
 }
}

Answer 5

Answer №3

I have recently implemented a customized logging function within the Utility.ts class:

    public static log(strValue: string) {
    if (CoreService._env !== 'prod') {
      console.log(strValue);
    }
  }

The _env variable is defined within the CoreService and its value is set inside the app.component like so:

this.coreService.env = environment.env;

In the environment.ts file, the env variable is specified as follows:

export const environment = { env: 'dev'} // for production it will be 'prod'

This logging approach allows you to easily control when logs are displayed in a production environment.

Answer 6

I have recently implemented a customized logging function within the Utility.ts class:

    public static log(strValue: string) {
    if (CoreService._env !== 'prod') {
      console.log(strValue);
    }
  }

The _env variable is defined within the CoreService and its value is set inside the app.component like so:

this.coreService.env = environment.env;

In the environment.ts file, the env variable is specified as follows:

export const environment = { env: 'dev'} // for production it will be 'prod'

This logging approach allows you to easily control when logs are displayed in a production environment.

Answer 7

Answer №4

This solution is applicable to Angular, ReactJS, VueJS, and Vanilla JavaScript, among others.

You have the option to enable or disable using this method!

console.log("Before disabling logs");

const consoleLog = false

if(!consoleLog) {
  console.log = function() {} 
}

console.log("After disabling logs #1");
console.log("After disabling logs #2");

Answer 8

This solution is applicable to Angular, ReactJS, VueJS, and Vanilla JavaScript, among others.

You have the option to enable or disable using this method!

console.log("Before disabling logs");

const consoleLog = false

if(!consoleLog) {
  console.log = function() {} 
}

console.log("After disabling logs #1");
console.log("After disabling logs #2");

Answer 9

Answer №5

I've developed a customized solution for situations like this: deblog. No need to rewrite the console object methods.

You have the flexibility to create a wrapper around the console object and establish specific logging methods that can be easily configured and disabled in production:

Here's an example of how you can implement this:

import { createDeblog } from "deblog";

const configuration = {
  logs: [
    {
      name: "foo",
      level: "debug",
      tag: "FOO -",
      enabled: true,  // <- You can set this using a PRODUCTION_LOG variable set to "false"
    },
    {
      name: "bar",
      level: "log",
      tag: `[${new Date(Date.now()).toLocaleTimeString()}] BAR -`,
    },
  ],
};

let dlog = createDeblog(configuration);

dlog.disableAllBut("bar"); // Disabling all logs except bar

dlog.foo("1 Connection Error"); // This will not be logged
dlog.bar("I'm here!");
dlog.foo("2 Connection Error"); // This will not be logged
dlog.bar("I only want bar logs here");

dlog.restoreAll();

dlog.bar("4 Connection Error"); // This will be logged

Answer 10

I've developed a customized solution for situations like this: deblog. No need to rewrite the console object methods.

You have the flexibility to create a wrapper around the console object and establish specific logging methods that can be easily configured and disabled in production:

Here's an example of how you can implement this:

import { createDeblog } from "deblog";

const configuration = {
  logs: [
    {
      name: "foo",
      level: "debug",
      tag: "FOO -",
      enabled: true,  // <- You can set this using a PRODUCTION_LOG variable set to "false"
    },
    {
      name: "bar",
      level: "log",
      tag: `[${new Date(Date.now()).toLocaleTimeString()}] BAR -`,
    },
  ],
};

let dlog = createDeblog(configuration);

dlog.disableAllBut("bar"); // Disabling all logs except bar

dlog.foo("1 Connection Error"); // This will not be logged
dlog.bar("I'm here!");
dlog.foo("2 Connection Error"); // This will not be logged
dlog.bar("I only want bar logs here");

dlog.restoreAll();

dlog.bar("4 Connection Error"); // This will be logged

Answer 11

Answer №6

    import { Injectable } from '@angular/core';
    import { environment } from 'src/environments/environment';
     
    @Injectable({ providedIn: 'root' }) 
    
    export class DisableConsoleService { 
       constructor() {}
    
       disableConsoleInProduction(): void { 
         if (environment.production) {
           console.warn(`🚨 Console output is disabled on production!`);
           console.log = function (): void { };
           console.debug = function (): void { };
           console.warn = function (): void { };
           console.info = function (): void { };
         }
       }
    }

Once you have the DisableConsoleService set up, you can inject it into your AppComponent and call the disableConsoleInProduction() method in the constructor to disable console logs in a production environment:

export class AppComponent {
  constructor(private disableConsoleService: DisableConsoleService) {
     this.disableConsoleService.disableConsoleInProduction();
  }
}

Answer 12

    import { Injectable } from '@angular/core';
    import { environment } from 'src/environments/environment';
     
    @Injectable({ providedIn: 'root' }) 
    
    export class DisableConsoleService { 
       constructor() {}
    
       disableConsoleInProduction(): void { 
         if (environment.production) {
           console.warn(`🚨 Console output is disabled on production!`);
           console.log = function (): void { };
           console.debug = function (): void { };
           console.warn = function (): void { };
           console.info = function (): void { };
         }
       }
    }

Once you have the DisableConsoleService set up, you can inject it into your AppComponent and call the disableConsoleInProduction() method in the constructor to disable console logs in a production environment:

export class AppComponent {
  constructor(private disableConsoleService: DisableConsoleService) {
     this.disableConsoleService.disableConsoleInProduction();
  }
}

Disabling the use of console.log() in a live environment

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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