A simple program asks the user to give a string and then the program will remove the consonants in the given string using JavaScript programming language.

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Program Listing

<h2>Remove Consonants in a String in JavaScript</h2>
  body {
  	font-family: arial;
<script type="text/javascript">

	function Remove_Consonants(str) {
		var str = document.getElementById( 'rev_cp' ).value;
  var strArr = str.split('');
  for (var x = 0; x < str.length; x++) {
    var char = str[x].toLowerCase();
    if (char == "a" || char == "e" || char == "i" || char == "o" || char == "u") {
    } else {
      strArr[x] = '';
  alert( "" + strArr);
  return strArr.join('');

<input type="text" size=40 id="rev_consonants"><br><br>
<input type="button" value="Remove Consonants String" onClick="Remove_Consonants(rev_consonants)">