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HTML5 validation when the input type is not "submit"
(9 answers)
Closed last month.
I have my code snippet this way:
<input type= "text" required="required" /><input type="submit />
The form validation happens only when there is no onclick parameter in the input attribute.
But I need to do further process in my JS file. So onclick function is needed for me along with the required parameter in it.
I am looking for something like:
<input type="text" required="required" /><input type="submit" onclick=signUp() />
But both onclick and required are not being taken together. any help is appreciated.
so run function after user make changes in text field simple
<input type= "text" required="required" onChange="signUp()" /><input type="submit />
You can try some JS validations and trigger the submit after validation like
$(document).click("#id", function (){
if($("#id").val() == ""){
return false
}
})
you could use a few lines of javascript and it will work. You could add:
document.querySelector('button').onclick = () => {
if(document.querySelector('input').value == ''){//if the user enters an Empty string,
console.log('field empty');
} else {console.log('not empty');}
}
<input type="text" /> <button>Submit</button>
Related
I ran into a situation where I have a HTML form and it has required on many of the fields. The issue is I have to use preventDefault which ignores 'required' inputs and submits the form even without the required fields. Because the work is not entirely up to me I must use preventDefault and work around it.
I am working with jQuery and I am trying to find a way to target the fields that have required and prevent the form from submitting on click.It is important that the required fields are filled out on the form before a user can submit the form as I do not want required information missing when it is being submitted. Help is appreciated!
HTML
<form id="myForm">
<input type="text" name="sentence1" id="st1" placeholder="Text here" required>
<input type="text" name="sentence1" id="st2" placeholder="Text here" required>
<input type="text" name="sentence1" id="st3" placeholder="Text here" required>
<input type="text" name="sentence1" id="st4" placeholder="Text here" required>
<input type="text" name="sentence1" id="st5" placeholder="This field is not required">
<button type="submit" id="submit-form">Submit</button>
</form>
Came across the same problem and here is the solution that works for me.
Form elements have a function called checkValidity and reportValidity. We can use these and override the click event for the submit button.
$('#submit-form').click((event) => {
let isFormValid = $('#myForm').checkValidity();
if(!isFormValid) {
$('#myForm').reportValidity();
} else {
event.preventDefault();
... do something ...
}
});
In your event handler, where you are using preventDefault(), add the checkValidity() method on the form element:
document.getElementById('myForm').checkValidity();
This will "statically" check your form for all HTML5 constraint violations (including required),
Just a quick solution for your problem. I hope this is what you need. Check below:
$('#submit-form').click(function(){
event.preventDefault();
if(validateForm()){
alert('sending');
}
});
function validateForm() {
var isValid = true;
$('input[type=text]').each(function() {
if ( $(this).val() === '' ) {
alert('validation failed');
isValid = false;
}
});
return isValid;
}
Or visit JSFiddle: enter link description here
You can use preventDefault() in forms submit method. Then 'required' will work.
document.querySelector('form').addEventListener('submit', submitHandler);
function submitHandler(e){
e.preventDefault();
//your code here
}
I'm trying to check if the textbox is empty for my form. However, whenever I try to hit submit instead of an alert box message, telling me Firstname is empty I get "Please fill out filled".
('#submit').click(function() {
if ($('#firstname').val() == '') {
alert('Firstname is empty');
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="elem" autocomplete="on">
First Name:
<br>
<input type="text" name="firstname" id="firstname" required placeholder="Enter the first name" pattern="[A-Za-z\-]+" maxlength="25"><br>
<input type="submit" id="submit" value="Submit" />
</form>
Firstly I'm assuming that the missing $ is just a typo in the question, as you state that you see the validation message appear.
The reason you're seeing the 'Please fill out this field' notification is because you've used the required attribute on the field. If you want to validate the form manually then remove that attribute. You will also need to hook to the submit event of the form, not the click of the button and prevent the form submission if the validation fails, something like this:
$('#elem').submit(function(e) {
if ($('#firstname').val().trim() == '') {
e.preventDefault();
alert('Firstname is empty');
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="elem" autocomplete="on">
First Name:
<br>
<input type="text" name="firstname" id="firstname" placeholder="Enter the first name" pattern="[A-Za-z\-]+" maxlength="25"><br>
<input type="submit" id="submit" value="Submit" />
</form>
Personally I'd suggest you use the required attribute as it saves all of the above needless JS code - unless you need more complex logic than just checking all required fields have been given values.
Because you have the required property set.It is giving you Please fill out field validation as the error message.It is the validation that HTML5 is performing.
For this please make one function like :
function Checktext()
{
if ($('#firstname').val() == '') {
alert('Firstname is empty');
return false;
}
else
{
return true;
}
}
now call this function on submit button click like :
<input type="submit" id="submit" value="Submit" onclick="return check();" />
I have an ASPX form and I need to disable the submit button if any one of six specific fields are empty. I'm trying to do this via Javascript or jQuery, but so far I can only find examples of either a single field on the form being empty, or ALL fields on the form. In my case, I don't care about several fields - only the six specific ones.
So basically, I have six conditions and one action. I found one example, but it was stringing together six different IF statements. I'd like to find a more streamlined way if possible. So, for example, I might do THIS for a single field... but how to do it for field2, field3, field4, etc. as well?
$(document).ready(function(){
$('#submit_btn').prop('disabled',true);
$('#field1').keyup(function(){
$('#submit_btn').prop('disabled');
})
});
Using Javascript or jQuery, what's the most efficient way to disable an input button if any of six input fields is blank?
You can add the same class name to all the elements and then do a validation foreach class element. Like in below code, i added the same class name to all the input for which the validation is required using class="valid" and then use the jquery class selector and the keyup method that you used to control the state of the button.
(function() {
$('.valid').keyup(function() {
var isEmpty = false;
$('.valid').each(function() {
if ($(this).val() == '') {
isEmpty = true;
}
});
if (isEmpty) {
$('#button1').attr('disabled', 'disabled');
} else {
$('#button1').removeAttr('disabled');
}
});
})()
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
1<input type="text" class="valid" /><br />
2<input type="text" class="valid" /><br />
3<input type="text" class="valid" /><br />
4<input type="text" class="valid" /><br />
5<input type="text" class="valid" /><br />
6<input type="text" class="valid" /><br />
<input type="button" id="button1" value="Test Me!" disabled="disabled" />
</form>
If your requirements will allow it, you can use HTML 5 field validation. The browser will not allow the form to submit.
<form>
<label for="choose">Foo</label>
<input name="bar" required>
<input type="submit" /> <!-- <--- This will generate an error message if the user clicks it when the field is empty -->
</form>
You have the start of it correct; create an array with six variables, one for each of the fields, and create a new function to validate everything that is called on each keyup. So you would have
var[] array
$('#field1').keyup(function() {
array[0] = $('#field1').val();
validate();
}
${'#field2').keyup(function() {
array[1] = $('#field2').val();
validate();
}
...create one each for each field
function validate() {
for (var i = 0; i < array.length; i++) {
if(!arrays[i]) {
$('#submit_btn').prop('disabled');
return;
}
}
$('#submit_btn').prop('enabled'):
}
What this does is it listens to the fields for changes and updates the array. A blank value is falsy so you can just go through the array and disable the button if it's blank or null or something. Break out of the for loop in that case; you don't care about whatever else. If nothing disables the button and breaks the for loop then it's valid and the button is enabled.
This approach is useful because it's easily extendable. You can just push extra things into the array if you want to check them without rewriting the validation function.
This assumes you do not want to just use standard form validation and do it manually.
Add a common class to each of the required inputs. Then check the length of that object against the length of a filtered object where value is not empty. Then you can use that condition to set the prop value of the button to true/false.
http://api.jquery.com/filter/
JQuery:
$('form .required-valid').on('input paste change', function() {
var $required = $('form .required-valid');
//filter required inputs to only ones that have a value.
var $valid = $required.filter(function() {
return this.value != '';
});
//set disabled prop to false if valid input count is != required input count
$('#submit_btn').prop('disabled', $valid.length != $required.length);
});
HTML:
<form>
<label>Field1</label>
<input type="text" id="field1" class="required-valid" />
<label>Field2</label>
<input type="text" id="field2" class="required-valid" />
<label>Field3</label>
<input type="text" id="field3" class="required-valid" />
<label>Field4</label>
<input type="text" id="field4" class="required-valid" />
<label>Field5</label>
<input type="text" id="field5" class="required-valid" />
<label>Field6</label>
<input type="text" id="field6" class="required-valid" />
<label>Field7</label>
<input type="text" id="field7" class="not-required" placeholder="not required" />
<button id="submit_btn" disabled>
Submit
</button>
</form>
Example:
https://jsfiddle.net/SeanWessell/q2msc80L/
$(document).ready(function() {
$('#submit_btn').prop('disabled', true);
$('#field1').keyup(function() { // on keyup
var value = $(this).val(); // retrieve the value of the input
if (value.length == 0) // if the value's length is 0 (empty)
$('#submit_btn').prop('disabled', true); // disable the button
else // if not
$('#submit_btn').prop('disabled', false); // enable it
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form>
<input id="field1"/>
<input id="submit_btn" type="submit"/>
</form>
Just note that the form can be submitted using enter key, so instead of checking on every keyup, it would be better if you check onsubmit instead.
I have the following code for a HTML form:
<input type="text" name="myText" value="Enter Your Name" readonly>
<input type="button" onclick="inn()" value="edit">
When I click on the edit button I would like the read only property of the textfield to be removed so that the user can edit the value of the text-field. I do not want to change any other property.
I also do not want to edit the entire form also with:
formId.innerHTML=
The above code shows only one text-field and one button. On my page there are 12 text-fields and 5 buttons. I would like to remove the property not re-edit the entire property again.
Please suggest some JavaScript code that would help.
function inn()
{
// What do I type here to remove the readonly property of the "MyText" text-field?
}
Firstly, you need to get the <input> element from DOM. One possible way:
var element = document.getElementsByName("myText")[0];
Then, to remove readonly you can either change the readOnly property:
element.readOnly = false;
or to explicitly remove the attribute:
element.removeAttribute("readonly");
Try:
Give an ID to your input element:
HTML
<input type="text" name="myText" id="myText" value="Enter your name" readonly />
JS
function inn() {
document.getElementById('myText').readonly = false;
}
First Assign an ID to your textbox.
i.e.
<input type="text" name="myText" id ="txt" value="Enter Your Name" readonly>
<input type="button" onclick="inn()" value="edit">
Then you can write in your javascript -
function inn()
{
if ($('#txt').attr("readonly") == true)
{
$('#txt').val('');
$('#txt').removeAttr("readonly");
}
}
I want creating form field hints where the default value shows 'Password' and on focus, it goes away. If the field loses focus with no use input, it will reveal back to the default value of 'Password'.
Problem: The default value for the password field gets masked as well. How can I show the default value of 'Password' without getting masked, and masks only the user input?
jQuery Code
$(".splash_register_short_input, .splash_register_long_input").each(function() {
$(this).val( $(this).attr('title') );
});
$(".splash_register_short_input, .splash_register_long_input").focus(function() {
if($(this).val() == $(this).attr('title')) {
$(this).val('');
}
});
$(".splash_register_short_input, .splash_register_long_input").blur(function() {
if($(this).val() == '') { // If there is no user input
$(this).val($(this).attr('title'));
$(this).removeClass('splash_register_have_userinput');
} else { // If there is user input
$(this).addClass('splash_register_have_userinput');
}
});
HTML Code
<form id="splash_register_traditional_form">
<input type="text" name="register_first_name" class="splash_register_short_input" title="First Name" /><label for="register_first_name"></label>
<input type="text" name="register_last_name" class="splash_register_short_input" title="Last Name" /><label for="register_last_name"></label>
<input type="text" name="register_email" class="splash_register_long_input" title="Email" /><label for="register_email"></label>
<input type="password" name="register_password" class="splash_register_long_input" title="Password" /><label for="register_password"></label>
<input type="submit" id="splash_register_signup_button" value="Sign up" />
</form>
You can simply use the HTML5 placeholder-attribute:
<input type="password" placeholder="Enter Password..." />
Concerning the lack of backwards compatibility as mentioned in the comments, this jQuery placeholder plugin combined with some kind of a fallback machanism in case the attribute is not supported (like maybe this one) may be helpful.
Best way to do it would be to not set default value as value of password field but as an overlay over password field which disappears on focus or when user changes value to something else. You can use the arelady existing jquery in-field-label plugins e.g.
http://www.viget.com/inspire/a-better-jquery-in-field-label-plugin/
http://fuelyourcoding.com/scripts/infield/
http://www.kryogenix.org/code/browser/labelify/
To hide password programatically add this line below oncreate android.provider.Settings.System.putInt(this.getContentResolver(),android.provider.Settings.System.TEXT_SHOW_PASSWORD, 0);