fake-console

Simulate realistic developer console outputs like npm install, server startup, build logs, CI jobs, test runners, and more — all with a simple JavaScript function.

Ideal for:

• Demos
• Tutorials
• Mock dev tools
• UI testing
• CLI projects
• Educational apps

Installation

1npm install fake-console

Usage/Examples

1const {
2  simulateNpmInstall,
3  simulateYarnInstall,
4  simulateExpressServer,
5  simulateGitPush,
6  simulateDockerBuild,
7  simulateErrorStack,
8  simulateReactBuild,
9  simulateAngularBuild,
10  simulateNestStart,
11  simulateSpringBootRun,
12  simulateDjangoRun,
13  simulateViteBuild,
14  simulateWebpackBuild,
15  simulateVueServe,
16  simulateNextJsDev,
17  simulatePythonFlaskRun,
18  simulateWarning,
19  simulateScriptExecution,
20  simulateTestRunner,
21  simulateCIJob
22} = require('fake-console');
23
24(async () => {
25  await simulateNpmInstall('express');
26  await simulateExpressServer(3000);
27  simulateErrorStack();
28})();

Available Simulations

Function	Description
simulateNpmInstall(pkg, duration)	Simulates npm install logs
simulateYarnInstall(pkg, duration)	Simulates yarn add output
simulateExpressServer(port)	Logs Express server start-up
simulateGitPush()	Simulates git push origin main
simulateDockerBuild()	Simulates docker build and run logs
simulateErrorStack()	Prints a fake runtime error with stack trace
simulateReactBuild()	Simulates npm start of Create React App
simulateAngularBuild()	Angular CLI build logs
simulateNestStart()	NestJS app boot with dependency tree
simulateSpringBootRun()	Spring Boot Java app logs
simulateDjangoRun()	Django dev server log
simulateViteBuild()	Vite dev server startup logs
simulateWebpackBuild()	Webpack build output with chunks/assets
simulateVueServe()	Vue CLI dev server logs
simulateNextJsDev()	Next.js dev command output
simulatePythonFlaskRun()	Flask app log
simulateWarning(msg)	Display warning messages
simulateScriptExecution()	Generic script logs (like Bash output)
simulateTestRunner()	Simulated Jest/Mocha test logs
simulateCIJob()	Simulates a full CI/CD job run log

Example: NPM Install

1await simulateNpmInstall(['axios', 'mongoose'], 2000);
2// > npm install axios mongoose
3// Installing axios...
4// Installing mongoose...
5// + axios mongoose added
6