When writing functions, we might have times when we have argument sent and other times when no arguments are sent to the function. In the cases where no arguments are sent, we might want to have default parameter values.
let getName = (animalName = ‘Bongo’) => {
return animalName;
}
console.log(getName()); In this case, “Bongo” prints out because we did not send any arguments. If we change our log statement…
console.log(getName(‘George’)); The output will now be “George”.
Use the Device Memory API to bucket users by RAM and serve right‑sized images and effects. It’s a coarse, privacy‑friendly hint for progressive enhancement.
The Document Object Model (DOM) is the browser’s in-memory representation of your HTML, letting JavaScript select elements (querySelector), listen to events (addEventListener), update content (textContent), toggle styles (classList), and create/insert nodes (createElement, insertAdjacentElement). With it, a button can change a box’s text, toggle a highlight class, set a data attribute, or insert a new paragraph right after the box—no page reload required—illustrating the simple flow: select, listen, update.
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