JSFiddle - React, Tailwind, and code Playground

HTML

<input type='text' id='input'><br>
		
	<div id="con"></div>
	
	
	<div id="result"></div>

JavaScript

var arr = [
		    'Advance',
		    'Belfair',
		    'Belleview',
		    'Boonville',
		    'Conestoga',
		    'Cotopaxi',
			'pf-1007'
		   ]

	for(var i = 0; i < arr.length; i++){
	  result.innerHTML += arr[i]+'<br>';
	}

	input.addEventListener('input', function()
	{
	    var reg = new RegExp(input.value,'i');
	    var res = '';
	    for(var i = 0; i < arr.length; i++)
	    {
	      if(arr[i].search(reg) != -1) res += arr[i]+'<br>';
	    }
	    result.innerHTML = res;
	});