<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<body>
<input type="text" id="input">
<button onclick="add()">ADD</button>
<ul id="save">
<li> </li>
</ul>
<script>
var db=[]
function clr(id){
if (id.style.background=='blue' ){
id.style.background=''
}
else {
id.style.background='blue'
}
}
function deleteli(i){
db.splice(i,2);
var lavan=""
for (var i=0;i<db.length;i++){
lavan +="<li onclick='clr(this)'>"+db[i]+"<button onclick='deleteli("+i+")'>delete</button></li> ";
