Abhith Rajan 
If you ask which is my favorite IDE, it is Visual Studio Code a.k.a vscode. One major strength of vscode is its extensions. And these are the extensions which I find very useful in vscode,
JavaScript
JavaScript (ES6) code snippets
JavaScript (ES6) code snippets contains code snippets for JavaScript in ES6 syntax
Import Cost
Import Cost display import/require package size in the editor
Programming Languages
TSLint
TSLint support for Visual Studio Code
Snippets
Angular v7 Snippets
Angular v7 Snippets by John Papa
Document This
Document This automatically generates detailed JSDoc comments in TypeScript and JavaScript files.
ES7 React/Redux/GraphQL/React-Native snippets
ES7 React/Redux/GraphQL/React-Native snippets contains simple extensions for React, Redux and Graphql in JS/TS with ES7 syntax
Icon Fonts
Icon Fonts contains snippets for popular icon fonts such as Font Awesome, Ionicons, Glyphicons, Octicons, Material Design Icons and many more!
Other
Highlight Matching Tag
Highlight Matching Tag highlights matching closing or opening tag
indent-rainbow
indent-rainbow makes indentation easier to read. This extension colorizes the indentation in front of your text alternating four different colors on each step.
Live Server
Live Server launch a development local Server with live reload feature for static & dynamic pages
npm Intellisense
npm Intellisense is a visual Studio Code plugin that autocompletes npm modules in import statements
Polacode
Polacode 📸 makes sharing code as a picture easier.
Peacock
Peacock subtly change the workspace color of your workspace. Ideal when you have multiple VS Code instances and you want to quickly identify which is which.
Themes
Material Icon Theme
Material Icon Theme provides material design icons for Visual Studio Code
Material Theme
Material Theme is one of the most epic theme now for Visual Studio Code
Uncategorized
Bracket Pair Colorizer 2
Bracket Pair Colorizer 2 is a customizable extension for colorizing matching brackets
Better Comments
Better Comments improves your code commenting by annotating with alert, informational, TODOs, and more!
Bookmarks
Bookmarks enables you to mark lines and jump to them
Code Spell Checker
Code Spell Checker is a spelling checker for source code
Git History
Git History enables you to view git log, file history, compare branches or commits
GitLens — Git supercharged
GitLens — Git supercharged supercharge the Git capabilities built into Visual Studio Code — Visualize code authorship at a glance via Git blame annotations and code lens, seamlessly navigate and explore Git repositories, gain valuable insights via powerful comparison commands, and so much more
Path Intellisense
Path Intellisense is a Visual Studio Code plugin that autocompletes filenames
Prettier - Code formatter
Prettier - Code formatter is the VS Code plugin for prettier/prettier