Can I somehow insert the required attribute into an input field only if a certain radio is checked?  I have an input field named "ladder-meters" that is not required to be filled per default. But if the user checks a radio button that is name...

I am building an angular app for which I have some forms set up. I have some fields that are required to be filled before submission. Therefore I have added 'required' on them:  <input type="text" class="form-control" place...

I have some form fields that are dynamically generated form the database. There are inputs, checkboxes, radio buttons, textarea's, and select's. All the fields are in a parent div with ID dynamic-form-fields. Some fields have a required attri...

I know how to check if a field is empty and generate an alert if so:  $('#checkout-form').validate({     rules: {         first_name: {             minlength: 2,             required: true         },         ...     } });   But what is the op...

Using ES6 parameter object destructuring we can require the presence of certain properties, as well as, provide default values. Dr. Axel Rauschmayer said in the Six nifty ES6 tricks article that parameter default values are only evaluated when they a...

I am writing an .html page which is to be used to perform a system checkout and verify functionality of various aspects of that system. The .html page features a table encapsulated in a form with each row of that table being a step to verify an aspec...

I am having some difficulties on how to add a function. Could someone show me how I can add a function that will show a pop up message saying "name / password field empty"  the problem here is if I click log in, while the input fields are emp...

var textbox = function(me) {     if (me.checked == false) {         var textb = document.createElement('textarea');          textb.name = "Address";         textb.id = "Address";         textb.required;         textb.placehold...

Does Angular Material Design require an input ng-model to be equal to a variable in order for required to work?  Without using Material Design, the following error checking works perfectly fine.  <label>First Name (as it appears on your card)&l...

I am getting a very odd error that I can't seem to get rid of in my code.  At the bottom of my jsp I have the following code snippit:  <jsp:include page="YuiCalendar.jsp" /> <script> YAHOO.vgi.popcal.calendar.init(); alert(YAH...