javascript演習 〜１０日目/３０日

覚えたこと

e.shiftKey, ctrlKey, altKey

checkbox.addEventListener('click', function(e){
  console.log(e.shiftKey)
)

thisの使い方、A = !Aとか

function handleCheck(e){
    if(e.shiftKey && this.checked){
      checkboxes.forEach(checkbox => {
        if((checkbox === this || checkbox === lastChecked) && lastChecked){
          inBetween = !inBetween;
        }
        if (inBetween){
          checkbox.checked = true;
        }
      })
    }    
    lastChecked = this;
  }