Console

Console.clear()

console.clear()

Console.log()

const name = 'Alice'
console.log(name)

Alice
> undefined

Console.table()

Collections of primitive types

const fruits = ["apples", "oranges", "bananas"]
console.table(fruits)

Collections of compound types

const companies = [
  {
    name: 'Amazon',
    founded: 1994,
    industry: 'E-Commerce, Cloud'
  },
  {
    name: 'Alphabet Inc.',
    founded: 2015,
    industry: 'Search, Cloud, Advertising'
  },
  {
    name: 'Facebook',
    founded: 2004,
    industry: 'Social'
  }
]
console.table(companies)

Restricting the columns displayed

const companies = [
  {
    name: 'Amazon',
    founded: 1994,
    industry: 'E-Commerce, Cloud'
  },
  {
    name: 'Alphabet Inc.',
    founded: 2015,
    industry: 'Search, Cloud, Advertising'
  },
  {
    name: 'Facebook',
    founded: 2004,
    industry: 'Social'
  }
]
console.table(companies, ["name", "founded"])

Sorting columns

Console.time() & Console.timeEnd()

const array = [1, 2, 3, 4, 5, 6, 7, 8, 9]

console.time('testFor')
for(let x = 0 ; x < array.length; x++) {
  array[x]
}
console.timeEnd('testFor')

console.time('testForOf')
for(let x of array) {
  x
}
console.timeEnd('testForOf')

console.time('testForEach')
array.forEach(x => x)
console.timeEnd('testForEach')

testFor: 0.04296875ms
testForOf: 0.108154296875ms
testForEach: 0.083984375ms

References