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<title>Mobile number validation with jQuery</title>
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body { padding: 5%; }
#mobile { margin-bottom: 20px; }
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<h1>Mobile number validation with jQuery</h1>
<p>Simple demo which passes mobile phone number to the API on form submit and shows a message based on response.</p>
<p>For non UK numbers you will need to include the country code at the start, in either +44 or 0044 format</p>
<p><a href="">Full mobile validation API documentation</a></p>
<form id="example_form">
<div class="form-group">
<label for="mobile">Mobile number</label>
<input type="tel" class="form-control" id="mobile" placeholder="Mobile number" aria-required="true" aria-invalid="false" required>
<button type="submit" class="btn btn-default" id="validate">Validate</button>
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src=""></script>
// Replace with your API key, test key will always return true regardless of mobile number
var api_key = "PCW45-12345-12345-1234X";
$(document).ready(function() {
$("#example_form").on("submit", function(e) {
function validate_mobile(element) {
// Grab the input text and trim any whitespace
var mobile_number = $(element).val().trim();
if (mobile_number != "") {
// Remove any previous validation results
// Create a template bootstrap alert div
var response_html = $("<div></div>", {
class: "alert",
role: "alert",
id: "mobile_valid"
// Create a loading message
var loading_html = $("<div></div>", {
id: "mobile_loading",
text: "Validating mobile number..."
// Create the URL including API key and encoded mobile number
var mobile_url = "" + api_key + "/mobile/" + encodeURIComponent(mobile_number);
// Call the API
url: mobile_url
}).done(function(data) {
if(data.valid === true) {
// Add relevant class and message to alert template
response_html.text("Mobile number valid");
// Add alert to page after mobile field element
// Set ARIA-invalid attribute of field to false (means it is NOT invalid)
$(element).attr("aria-invalid", "false");
// Additional info such as Network is also returned, full details -
} else {
// Add relevant class and message to alert template
response_html.text("Mobile number not valid: " + data.state);
// Add alert to page after mobile field element
// Set ARIA-invalid attribute of field to true (means it IS invalid)
$(element).attr("aria-invalid", "true");
// Full list of "state" responses -
}).fail(function(error) {
// Triggered if API cannot be reached or does not return 200 HTTP code
// More info -
} else {
// Could show an "mobile number is required" message here