JavaScript

   false

   const myConst = ...;
   let myVar = ...;

   arguments

   Math.floor(...)
   Math.random()

   `${myVar}`
   myString.startsWith('abc')
   myArray.join(',')

Array

   [1, 2, 3]
   Array(myLength.fill(myValue)  // tá istá hodnota
   Array.from(myArray)  // skopíruje hodnoty
   Array.from('abc')  // ['a', 'b', 'c']
   Array.from(mySet)
   Array.from(myMap)  // [[k1, v1], [k2, v2]]
   Array.from(myArray, (oldValue, index) => ...)  // upraví hodnoty
   Array.from({length: myLength}, (_, index) => ...)  // vygeneruje hodnoty
   myArray.push(...)
   myArray.forEach(item => ...)
   myArray.forEach((item, index) => ...)
   myArray.slice()
   myArray.slice(start, end)

Set

   new Set()
   mySet.size
   mySet.add(...)

Map

   myMap.keys()
   myMap.values()
   myMap.has(k)
   myMap.get(k)
   myMap.set(k, v)

DOM

   alert('...')

   document.getElementById('myId')
   document.querySelectorAll('img')
   document.querySelectorAll('.myClass')
   document.createElement('div')

   myCanvas.getContext('2d')
   myCanvas.getBoundingClientRect()
   myContext.clearRect(x, y, w, h)
   myContext.drawImage(image, x, y, w, h)

   myImage.src

   myButton.addEventListener('click', e => ...)

   myClickEvent.clientX
   myClickEvent.clientY

   myRectangle.left
   myRectangle.top

   myElement.innerHTML
   myElement.textContent
   myElement.classList
   myElement.style
   myElement.appendChild(...)