JavaScript

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Cheat sheet

Objects

const object = {
  a: 'somestring',
  b: 42,
  c: false
}

Object.keys() - returns an array with object keys.

Object.keys(object) => ["a", "b", "c"]

Object.values() - returns an array of object values, omit keys.

Object.values(object) => ["somestring", 42, false]

Object.entries() - returns an array with [key, value] pairs.

for (let [key, value] of Object.entries(object)) {
  console.log(`${key}: ${value}`)
}

// expected output:
// "a: somestring"
// "b: 42"
// order is not guaranteed

Object.freeze() - prevent object mutations.

console.log() with css styles

console.log('%cyou are awesome :)', 'color: white; font-size: 46px')