you-dont-need/you-dont-need-lodash-underscore

★ 19,168JavaScriptAudience · developerComplexity · 1/5Setup · easy

Mindmap

mindmap
  root((you-dont-need-lodash))
    What it does
      Replace Lodash with native JS
      ESLint plugin
    Tech stack
      JavaScript
      ESLint
      npm
    Covers
      Arrays
      Collections
      Strings
      Objects
    Use cases
      Reduce dependencies
      Bundle size audit
      Learn modern JS

mindmap root((you-dont-need-lodash)) What it does Replace Lodash with native JS ESLint plugin Tech stack JavaScript ESLint npm Covers Arrays Collections Strings Objects Use cases Reduce dependencies Bundle size audit Learn modern JS

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Things people build with this

USE CASE 1

Audit an existing project to remove unnecessary Lodash or Underscore imports and shrink the bundle size.

USE CASE 2

Add the ESLint plugin to automatically flag Lodash functions that have native JavaScript replacements.

USE CASE 3

Learn which modern JavaScript array, string, and object methods make utility libraries unnecessary.

USE CASE 4

Onboard to a codebase that uses Lodash heavily and understand what each function does natively.

Tech stack

JavaScriptESLintnpm

Getting it running

Difficulty · easy Time to first run · 5min

In plain English

Lodash and Underscore are popular JavaScript utility libraries that developers add to their projects to handle common tasks like filtering arrays, sorting collections, or manipulating strings. The problem is that modern JavaScript, specifically ES5 and ES6, has quietly added many of these same capabilities as built-in, native features that don't require any external library at all. This project is a reference guide that shows, side by side, which Lodash or Underscore functions can simply be replaced with plain JavaScript that already ships in the browser. Instead of importing a library to do something like find an item in an array, you can often use a native method that does the same thing with no extra dependency. The guide covers arrays, collections, functions, strings, objects, and more. It also includes an ESLint plugin, a code analysis tool you can add to your JavaScript project, that automatically flags spots in your code where you're using a Lodash or Underscore function that has a built-in native alternative. You install it via npm and configure it once, and it points out where you can simplify. You'd reach for this when auditing a project to reduce its dependency footprint, when onboarding to a codebase that heavily uses these libraries, or when deciding whether to add them in the first place. The tech stack is JavaScript, with ESLint as the tooling layer.

Copy-paste prompts

Prompt 1

I'm using Lodash in my project, show me how to install the you-dont-need-lodash-underscore ESLint plugin and configure it to flag replaceable functions.

Prompt 2

My bundle uses lodash.map, lodash.filter, and lodash.reduce, replace each with the native JavaScript equivalent so I can drop the dependency.

Prompt 3

Walk me through converting a file that uses 10 Underscore.js functions to plain ES6 JavaScript using this guide as a reference.

Prompt 4

Which Lodash functions do not have a native equivalent yet and still require the library? Use this guide to give me that list.

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