Clone Objects in JavaScript

const food = { beef: '🥩', bacon: '🥓' }

// "Spread"
{ ...food }

// "Object.assign"
Object.assign({}, food)

// "JSON"
JSON.parse(JSON.stringify(food))

// RESULT:
// { beef: '🥩', bacon: '🥓' }

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Convert Array-like to True Array

Copy a string to the clipboard

Copy a string to the clipboard. Only works as a result of user action (i.e. inside a click event listener).

Rest Operator for Objects

Now we can use rest on the properties of an Object. It allows us to explicitly extract certain named variables, and assign any uncalled variables into a catchall Object.

Đếm có bao nhiêu items giống nhau trong một array

reduce javascript. Đếm có bao nhiêu items giống nhau trong một array

Optional chaining javascript