Prefill text field with http, mailto

You can use the below sample code to prefill an input text field with URL/ EMail prefixes based on user input. It prefixes mailto syntax if user input forms an email pattern.

(function($) {
    "use strict";
    $(document).on("change", ".js-coral-pathbrowser-input", function(e) {
        // If it's a relative path - do nothing
        if (this.value.indexOf('/') != 0) {
            // It's not a relative path - treat it as either a mail address or webb address
            if ((this.value.indexOf('@') > -1) && (this.value.indexOf('mailto:') == -1)) {
                // It's a mail address
                $(this).prop("value", 'mailto:' + this.value);
            } else if ((this.value.indexOf('http://') == -1) && (this.value.indexOf('https://') == -1) && (this.value != "") && (this.value.indexOf('mailto:') == -1) && ($(this).parent().parent().hasClass('js-cq-TagsPickerField') == false)) {
                // It's a webb address
                $(this).prop("value", 'http://' + this.value);
            }
        }
        if (this.value.indexOf(' ') >= 0) {
            $(this).prop("value", $.trim(this.value));
            $(this).prop("value", this.value.replace(new RegExp(' ', 'g'), '%20'));
        }
    });
})(Granite.$);

You need to put the above code in a clientlibs JS file with the category "cq.authoring.dialog".