Answers for "javascript check input focus in event"

javascript test if element has focus

var myElement = document.getElementById('myID');
if(myElement === document.activeElement){
    //myElement Has Focus
}

js focus event

const form = document.getElementById('form');

form.addEventListener('focus', (event) => {
  event.target.style.background = 'pink';    
}, true);

form.addEventListener('blur', (event) => {
  event.target.style.background = '';    
}, true);

javascript select input text on focus

focusMethod = function getFocus() {           
  document.getElementById("myTextField").focus(); //select the input textfield and set the focus on it
}