- Async await
- Event Loop
- Event Emitter
Event emitters are useful when you want to listen to an event and do something when it happens.
Promise.allSettled returns a promise when all inputs are settled that is either fulfilled or rejected.
- Virtual DOM
Virtual DOM otherwise known as VDOM, is a virtual representation of actual DOM (Document Object Model) in the browser.
- Custom Spread Operator [...5]
The spread operator is denoted by 3 dots. Basically it takes an iterator and can do copy or expand or concat or merge.
Say we want many promises to execute in parallel and wait until all of them are resolved. Then Promise.all() is our candidate.
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