Generally, Elementor Phone number field in Elementor Form doesn’t support country wise masking for Phone number formatting. So, we will do it manually.
To create a form with a number field in the US phone number format using Elementor, you can follow these steps. This approach utilizes Elementor’s form widget and a bit of custom JavaScript for enforcing the US phone number format (###) ###-####.

Add the following JavaScript code using any code snippet plugin.
jQuery(document).ready(function($) {
// Change field_9c47410 to the appropriate ID of your Elementor form field
var inputField = $('#form-field-xxxx');
// Add event listener for input event
inputField.on("input", function() {
// Get the entered value
var enteredValue = inputField.val();
// Remove any characters that are not numbers, brackets, or dashes
var cleanedValue = enteredValue.replace(/[^\d()\-, ]/g, '');
// Format the value as US phone number
var formattedValue = cleanedValue.replace(/(\d{3})(\d{3})(\d{4})/, '($1) $2-$3');
// Update the input field value with the formatted value
inputField.val(formattedValue);
// Validate input
if (cleanedValue.length !== 14) {
// Display a validation message for invalid length
inputField[0].setCustomValidity("Phone number must be exactly 14 characters.");
} else if (!isValidPhoneNumber(cleanedValue)) {
// Display a validation message for invalid input
inputField[0].setCustomValidity("Please enter a valid US phone number.");
} else {
// Clear any previous validation message
inputField[0].setCustomValidity("");
}
});
// Add event listener for form submission
$('form').on('submit', function(event) {
var inputField = $('#form-field-xxxx');
// Validate input before submission
if (!inputField[0].checkValidity()) {
// Prevent form submission if there's a validation error
event.preventDefault();
}
});
});
// Function to validate US phone number
function isValidPhoneNumber(phoneNumber) {
var phoneRegex = /^\(\d{3}\) \d{3}-\d{4}$/;
return phoneRegex.test(phoneNumber);
}
JavaScriptFinal Result
After adding the above snippet, this is how it will look

Final Recommendations
- Test the Changes: Ensure that you test these changes on a staging or development version of your site first. This helps to avoid any potential issues on your live website.
- Consider User Experience: While formatting and placeholders can improve user experience, ensure they work seamlessly across different browsers and devices.
This approach should provide a more intuitive and guided experience for users entering their phone numbers during the WooCommerce checkout process.