10 npm Scripts Patterns That Replace Your Build Tools

10 npm Scripts Patterns That Replace Your Build Tools Most JavaScript projects reach for Webpack, Gulp, or custom build scripts when npm scripts alone could handle the job. The scripts field in package.json is more powerful than most developers realize — it can handle build pipelines, watch modes, pre/post hooks, cross-platform commands, and parallel task execution. Here are 10 patterns that eliminate the need for separate build tools in many projects. 1. Pre/Post Hooks npm automatically runs pre and post scripts around any named script: { "scripts" : { "prebuild" : "rm -rf dist" , "build" : "tsc" , "postbuild" : "cp package.json dist/" } } When you run npm run build , npm executes: prebuild → build → postbuild . No task runner needed. This works for any script name. pretest runs before test . postdeploy runs after deploy . It's a built-in pipeline system. 2. Parallel Execution with npm-run-all { "scripts" : { "build" : "npm-run-all --parallel build:*" , "build:js" : "esbuild src/index