Tips for writing short, concise, and clean JavaScript code

You must have seen the guy in the picture above. He simplifies everyday things — and that’s exactly what we are going to do with JavaScript in this article.

JavaScript has a lot of cool features that most beginner and intermediate developers don’t know. I’ve picked out 10 hacks that I use in my everyday JavaScript projects.

1. Conditionally Add Properties to Object

2. Check if a Property Exists in an Object

3. Dynamic Property Names in Objects

4. Object Destructuring With a Dynamic Key

5. Nullish Coalescing, ?? Operator

6. Optional chaining (?.)

7. Boolean Conversion Using the !! Operator

8. String and Integer Conversions

9. Check Falsy Values in an Array

10. Flattening Arrays of Arrays

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