logo
down
shadow

form validation in javascript vs html5


form validation in javascript vs html5

By : Marhula Broskynova
Date : November 17 2020, 04:28 AM
this will help HTML5 validation is convenient but it depends on your audience. HTML5 validations are not supported by some older browsers (here is the list: http://caniuse.com/#feat=form-validation). Also I've noticed a Safari bug: the form doesn't validate (expected behavior) but the pop up error message doesn't display leaving the user unsure of the issue.
code :


Share : facebook icon twitter icon
html5 form validation, void form action and execute jQuery when all html5 form elements are validated?

html5 form validation, void form action and execute jQuery when all html5 form elements are validated?


By : user2964691
Date : March 29 2020, 07:55 AM
I hope this helps . According to this: Do any browsers yet support HTML5's checkValidity() method?, and this may not be the latest truth since HTML5 is a work in progress, the Form.checkValidity() and element.validity.valid should let you access validation information from JavaScript. Assuming that's true, your jQuery would need to attach itself to the form submit and make use of that:
code :
$('#membershipform').submit(function(event){
    // cancels the form submission
    event.preventDefault();

    // do whatever you want here
});
What javascript fallback does best simulate html5 form validation

What javascript fallback does best simulate html5 form validation


By : Hafiz
Date : March 29 2020, 07:55 AM
With these it helps CSS tricks has a nice article on the fallback process here: http://css-tricks.com/progressively-enhancing-html5-forms/
They also suggest a project such as this http://code.google.com/p/webforms2/
Javascript Form Validation within HTML5

Javascript Form Validation within HTML5


By : ggBuTTers
Date : March 29 2020, 07:55 AM
seems to work fine Move the ids to class. Then use getElementsByClassName and iterate through each.
So,
code :
<input type="text" id="numbers" name="uadnumber" />
<input type="text" class="numbers" id="numbers1" name="uadnumber" />
if(document.getElementById('numbers').value.match(numexp)){
return true;
}
var nbrs = document.getElementsByClassName('numbers');
for (var i = 0; i < nbrs.length; i++)
{
if(!nbrs[i].value.match(numexp)){
alert("Fields within this form must only use numbers, and not left empty");
return false;
}
}
return true;
Javascript Code For HTML5 Form Validation Not Working

Javascript Code For HTML5 Form Validation Not Working


By : fitka
Date : March 29 2020, 07:55 AM
wish of those help Like Ethan Brown said, you might missing attributeSupported function. If this is the case, you can add it to your code. It will check if attribute (in your case it's "required") is supported
code :
function attributeSupported(attribute) {
    return (attribute in document.createElement("input"));
}
function isSafariOnly() {
    return navigator.userAgent.indexOf('Safari') != -1 && navigator.userAgent.indexOf('Chrome') == -1;
}
$(function () {
    $('#contactForm').submit(function () {
        if (!attributeSupported("required") || isSafariOnly()) {
            $("#contactForm [required]").each(function (index) {
                if (!$(this).val()) {
                    alert("Please Fill In All Required Fields.");
                    return false;
                }
            });
        }
        return true;
    });
});
Also do I need this in my <head> tag:
<script type="text/javascript" src="http://code.jquery.com/jquery-latest.min.js">
<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
if (isSafariOnly()) {
    $("#contactForm [required]").each(function (index) {
        if (!$(this).val()) {
            alert("Please Fill In All Required Fields.");
            return false;
         }
    });
}
HTML5 form validation without Javascript validation

HTML5 form validation without Javascript validation


By : Jeroen
Date : March 29 2020, 07:55 AM
will help you When you apply an HTML validation via HTML to a form element and that element's value doesn't meet the validation criteria, the form will NOT be submitted.
But, if you get JavaScript involved, you will have to take control of this process. The simplest way is to simply check the form's validity.
code :
var btn = document.getElementById("btnSubmit");
var frm = document.getElementById("frmTest");


btn.addEventListener("click", function(){
  // The HTML 5 Forms API provides a .checkValidity()
  // method to your form object so that you can know
  // if the form is valid or not:
  if(frm.checkValidity()){
    frmTest.submit();
  }
});
<form method=post action="http://www.somewhere.com" id=frmTest>
  
  <input required>
  <input type=button id=btnSubmit value=submit>
  
</form>
  // Custom form validation logic:
  function validate(evt) {

    // An HTML5 form has a checkValidity() method which forces it
    // to examine the validity of all controls that know how to validate
    // and it returns a boolean indicating if ALL these controls are valid
    // or if any ONE of them is not.
    var valid = theForm.checkValidity();
    if (valid) {
      // Everything is good. Submit the form:
      theForm.submit();
    } else {
      // At least one form element is invalid. Loop through all the elements to
      // see which one(s) they are:
      var theElements = theForm.elements;

      for (var i = 0; i < theElements.length; i++) {
        var theElement = theElements[i];

        // If the form element participates in the HTML5 Validity Framework and
        // if it is invalid...
        if (theElement.willValidate && !theElement.validity.valid) {

          console.warn(theElement.id + " validity details: ");

          // ...The object will have a validity object property:
          console.log(theElement.validity);

          // The element is invalid. Loop through all the validity object's
          // properties to see why it is invalid:
          for (var constraint in theElement.validity) {

            // Check the particular validity constraint for true
            if (theElement.validity[constraint]) {
              // Update the span element next to the offending form element with the reason:
              theElement.nextElementSibling.innerHTML = constraint;
            }  // End If

          }  // End For

        }  // End If

      } // End For

    } // End If

  }  // End Function
Related Posts Related Posts :
  • React | Can´t load Images > Module not found
  • Dynamically creating buttons in DOJO
  • 404 Not Found in AJAX post call
  • How do I find out, using javascript, what software opened and running my application?
  • Javascript to check the status of wireless connection
  • StarDict support for JavaScript and a Firefox OS App
  • Phonegap event Resume
  • call javascript function on ENTER key press?
  • When is the best time to remove no-js classes from the html tag
  • Recommended email sending languages
  • setInterval not working properly with chrome
  • Does IE create new scope for each script tag?
  • Uncaught SyntaxError: Unexpected token < Underscore and parse issues
  • How to pass captured URL to Email Body in HTML
  • How to structure default nested resources?
  • Store all the keys of a JSON object in a variable
  • Need an efficient way to group the Array of object in javascript
  • a sensible approach to highcharts x-axis labels
  • IDE autocompletion for javascript AMD loading style
  • Bootstrap menu disappears after first click setting the ul style to none
  • split ajax json response errors in each field
  • how to add javascript in head in cmsms
  • REGEX: Finding the correct occurrence order of some given special characters in a string
  • How do you preserve a JavaScript date's time zone from browser to server, and back?
  • Return binary result from phantomjs webserver
  • must be listed in the web_accessible_resources manifest key in order to be loaded by pages outside the extension.
  • Replacing a substring of an element's text with another string
  • How do I filter marks greater than or equal to 90 in this array?
  • Modify the text of my radio input button?
  • Clicking on status bar does not scroll to top of app (Trigger.io)
  • Mocha JS: How to highlight specific assertion failure?
  • $.getJSON jquery parsing to HTML
  • Find items of a certain class (a) that are also in other classes (b,c,d)
  • Setting different images for D3 force-directed layout nodes
  • Integrating Dropzone.js with angular
  • Control sprite animation speed
  • Can only one error / success function be assigned for AngularJS $http promises?
  • Working with math in javascript
  • Django variable isnt recognized by javascript
  • $.when does not work with $.scrollTo plugin
  • How to read local xml file using $.ajax?
  • Manifest is not Valid JSON. What is wrong?
  • AngularJS re-initialise JS after statechange
  • WebRupee is not working
  • How can I make the jQuery MultiSelect widget read-only?
  • How to associate javascript code with dom elements?
  • How to remove track from MediaStream and "stop" webcam?
  • clearvalidators not working in angular 6 form control
  • Remove Count Attribute in json data
  • queue up function callbacks
  • How to stop all Soundcloud streams in once?
  • Sliding div onclick left/right
  • RequireJS JQuery shim doesnt work with VS2013
  • What is the Meteor concurrency model?
  • Events on children of contenteditable element
  • Simple jquery not working to print the input value
  • Javascript templating language in reverse
  • Making Pagination in Javascript Scalable (for large # of db results)
  • Performance of Stateless Authentication in SPA and SSO (Single Sign On)
  • Assigning a value for view asynchronously
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org