🔥 There are 446 Hot Tips!!

🔥 Format large numbers in your JavaScript with numeric separators.

const milly = 1_000_000;

This doesn't affect how the number works or is displayed - just helpful for reading large values quickly.

🔥 Why do you sometimes see !!double bang in front of variables in JavaScript?

🔥 Did you know you can use type=“module” in a script tag block? Import external dependencies and use top level await without any tooling!

🔥 Use CSS :has() to select items based on what children they have.

This :has() never been possible in CSS before this and is pretty exciting.

I made a browser extension to detect who has paid $8 for their blue checkmark

🔥 JS Fundamentals: what is truthy and falsy?

🔥 Use CSS :where() to select multiple children inside a parent selector.

Super handy for H1 → H6 and selecting all inputs inside a form.

🔥 Since Arrays are Objects in JavaScript, you can use object destructuring on an array to get values like first, middle and last.

🔥 Ever try sort a list of strings, but get tripped up by capitals and accented characters?

Use JavaScript’s Collator API!