Number 1 this week, 30 seconds of code is a collection of more than 300 snippets of JavaScript ES6 code, classified under tags such as:

• Array
• Browser
• Date
• Function
• Math
• Node

It’s a great way to learn JavaScript by the example, all the snippets are concise and well commented.

Also it can be helpful if you don’t want or if you can’t include in your code a “utils” library like Lodash or any micro-package.