Only for chrome
<input type="search" name="searchTerm" class="form-control" id="searchField" autocomplete="off" placeholder="">/*restore the cancel button on searchbox that bootstrap breas*/
input[type="search"]::-webkit-search-cancel-button {
-webkit-appearance: searchfield-cancel-button;
}// if any key is entered, fire searchField()
document.querySelector('#searchField').addEventListener('keyup', searchField, false);
// if the "x" button is clicked on search box, fire searchField()
document.querySelector('#searchField').addEventListener("search", searchField, false);