Read DOM nodes

parent.getElementById('id');

• It allows us to obtain an element by its identification.

parent.getElementsByClassName(‘class’):

• It allows us to obtain an Array with all the child elements that have the same class.
• “getElementByClassName” does not exist, that is to say we will not be able to obtain only 1 element with that class.

parent.getElementsByTagName(‘div’);

• It allows us to obtain an Array with all the child elements that have the same Tag name.
• “parent.getElementsByTagName” does not exist, that is to say we will not be able to obtain only 1 element with that Tag name.

parent.querySelector(' ') 🌟

• It allows us to search in 3 ways and returns the first item that matches the search pattern.
  • By id
  • By Class name
  • By Tag name

parent.querySelectorAll(' ') 🌟

• It allows us to search in 3 ways and returns a NodeList with items that matches the search pattern.
  • By id
  • By Class name
  • By Tag name