how to add element and remove in html through javascript code example

Example 1: javascript remove element

//remove a dom element
var element = document.getElementById("someId");
	element.parentNode.removeChild(element);

//remove element from array
var colors=["red","green","blue","yellow"];
var blue=colors.splice(2, 1);//first arg is array index to remove
//colors is now ["red","green","yellow"]

Example 2: js delete element

// delete an element from the dom
var elem = document.querySelector('#some-element');
elem.parentNode.removeChild(elem);


// keep element in dom
var elem = document.querySelector('#some-element');
elem.style.display = 'none';