How do I enable enter key submit? - javascript

So two questions here: If I use <input type="button" onclick="validate()"> then the enter key wouldn't work. However, I can use type="submit" but how would I invoke validate()?

You can have the form validate on submit, which is better anyways:
<form ... onsubmit="return validate()">
<input type="submit" />
</form>
You can return false from your validation function to prevent the form from submitting. The form will validate regardless of whether it's submitted via the return key or the button being clicked.

Related

Angular js' $isEmpty functionality in form input

My code looks something like this -
<form name="myForm" ng-submit="!myForm.phone.$isEmpty(this.$viewValue)" action="/my/url" method="get">
<input name="phone">
<button type="submit">submit</button>
</form>
Now I can't submit the form even if I fill the phone number field.
But if I code like this :
<form name="myForm" ng-submit="!myForm.phone.$isEmpty(myForm.phone.$viewValue)" action="/my/url" method="get">
<input name="phone">
<button type="submit">submit</button>
</form>
Its perfectly working now.
So the difficulty is with 'this'. I cant even check the context of this, it should be the the context of $scope.myForm.phone, but somehow it isn't. Can someone please explain.
That's not what ng-submit is for. ng-submit is a function or expression called when the form is submitted. It's nothing to do with validation. If you want to ensure the text field is not empty before it's submitted you just need to add required and then if it is empty myForm.$invalid will be true.
Is this what you are trying to do:
html
<form name="myForm" ng-submit="submit(phone)">
<input name="phone" type="text" ng-model="phone.value" required>
<button type="submit" ng-disabled="myForm.$invalid" >submit</button>
</form>
controller
$scope.submit = function(phone){
console.log('phone', phone);
}
$scope.phone = {
value: ''
};
update
The this that you passed into the ng-submit is a reference to your controller. Since you have the name attribute set to myForm you can access the form model via this.myForm and the phone model via this.myForm.phone. So if you wanted to use $isEmpty to verify if the field is empty you would have to use:
this.myForm.phone.$isEmpty(this.myForm.phone.$viewValue)
ng-submit is used to provide a handler for the moment when the form IS submitted.
What you're looking for is disabling submit button with ng-disabled
<form name="myForm" ng-submit="functionInController()" action="/my/url" method="get">
<input name="phone" required>
<button type="submit" ng-disabled="myForm.$invalid">submit</button>
</form>
Pay attention to required directive added to the input. Which makes sure this field is not empty for submit

Enter Key not working in button

i'm using button key for my project but this is not work when i push Enter Key.
why 'enter key' not working in this form?
<form action="" method="post">
<input type="text" >
<input type="button" >
</form>
how this is work with javascript, plz help me
i will not sue type="submit"
It seems you want implicit submission:
A form element's default button is the first submit
button in tree order whose form owner is that
form element.
If the user agent supports letting the user submit a form implicitly
(for example, on some platforms hitting the "enter" key while a text
field is focused implicitly submits the form), then doing so for a
form whose default button has a defined activation behavior
must cause the user agent to run synthetic click activation steps
on that default button.
Therefore, the button must be a submit button, not a button in button state:
<input type="submit">
I think an <input type="submit"> is what you want :)
$(form).on('submit', function{
//do whatever you want...
})
<form action="raftel">
<input name="name" type="text"/>
<input name="password" type="password"/>
<input type="submit"/>
</form>

i want to check form validation by input type button, not by submit, could any one help in this?

i want to only validate the form and don't want to submit it, so that i can use the form values in modifying other part of the same html page by calling a function "myfunction()" after form validation. for this i want to use a button suggest me required code.my code is following :-
<form name="form1">
<input type="text" name="name1" required></input>
<button onclick="myfunction()" ></button> // i want to validation of form by this button
</form>
You can try this by setting onsubmit event of form to return false; as follows:
<form name="form1" onsubmit="return false;">
<input type="text" name="name1" required></input>
<button onclick="myfunction();" ></button>
</form>
This will not submit the form on clicking the button but will execute myfunction() instead.
If you know jQuery, then you can do this as follows:
$('form[name="form1"]').submit(function (event) {
// This will prevent form being submitted.
event.preventDefault();
// Call your function.
myfunction();
});
For maintainability consider adding an event listener to the button by selection instead of inline. When the button is clicked an event object is passed to the callback. Event objects have a number of properties and methods. In this case you're looking for the method "preventDefault" which prevents the default action of the event which in this case is a form submit. An example:
<form name="form1">
<input type="text" name="name1" required />
<button id="my-button"></button>
</form>
document.getElementById('my-button').addEventListener('click', function(e){
e.preventDefault();
var form = document.forms['form1']; //or this.parentNode
//do stuff
}, false);
i have achived this goal by modifying code as follow:-
<form name="form1" onsubmit="myfunction();return false;">
<input type="text" name="name1" required></input>
<button >check form and call function</button>
</form>
by this i am able to check form and call my function and form is also not submitted in this case.
now i want to reset the form without clicking any button. suggest javascript code for this.
HTML form validation by input type button, not by submit.
Try this
<form name="form1" onsubmit="myfunction(); return false;">
<input type="text" name="name1" required></input>
<button type="submit">Submit</button>
</form>

Submitting form using button on enter

I have an html form that I want to only submit from a button located outside my form. I am using javascript to perform some verification and do not want the form to submit unless my javascript functions succeed. I found that if I have the button inside the form it will always submit regardless of the javascript, but if I have it outside the form when a user presses enter it simply submits the form. How can I force enter to perform the button javascript instead of submitting?
<form name="form1" action=<?$_SERVER["PHP_SELF"].'?'.$_SERVER["QUERY_STRING"]?> method="post">
<input type="text" maxlength="5" size="5" name="frmZip" value="">
<input type="hidden" name="frmLat" value="200">
<input type="hidden" name="frmLng" value="200">
<input type="submit" disabled="disabled" style="display:none" />
</form>
<button type="button" id="GetCoordinates" onclick="doClick();">Find Stores</button>
EDIT:
Found my solution.
I changed from
</form>
<button type="button" id="GetCoordinates" onclick="doClick();">Find Stores</button>
to
<input type="button" name="frmSubmit" onclick="doClick();" value="Submit">
</form>
This prevented the button from submitting the form so I submitted it in my doClick() via javascript.
EDIT 2:
While this seemed to work for a time, it has stopped catching the enter keystroke. I updated my button to:
<input type="submit" name="frmSubmit" onclick="return doClick();" value="Find Stores">
And always returned false in doClick(). This allowed me to submit the form via javascript once everything had executed.
While this doesn't answer your direct question, you can actually keep the button and simply use your validation on the form submit:
<form onsubmit="return validateForm()">
Then, in your validateForm method, return true or false indicating whether or not the validation has passed.
However to answer your direct question, you can also use the same approach on the submit button which will prevent the form from being submitted.
Update
As pointed out in the comments, an unontrusive solution is often desirable so here's that:
document.getElementById('theForm').onsubmit = function() { return validateForm(); };
Your button inside the form will not submit the form on enter if you add preventDefault...
$("form").submit(function(e) {e.preventDefault();});

How to prevent from refreshing after submitting?

I got this code right here which executes the function validate() when submit is clicked. The function changes some of the text in the page. But I can't see the effect because the page automatically refreshes after submission:
<form name="myForm" onsubmit="validate(); return false;">
Age: <input type="text" name="age" />
Height (meters): <input type="text" name="height" />
Weight (kilograms): <input type="text" name="weight" />
<input type="submit" value="Submit">
</form>
How do I prevent the page from reloading after each submission?
You can use a test button inside your form
<input type="button" value="Test button" onclick="validate();">
Once solved, remove the button.
You can also use Firebug (or equivalent) to add a breakpoint in your javascript code.
The submit event fired by your form automatically initiates the form action. If no form action is declared, it refreshes the page. Your need to prevent this default action from occuring before validation, then submit the data after it has passed validation.
Add preventDefault() to your validation code.
Make sure you add return false; in your validate() function.
That will prevent the form to be submitted.
Example :
function validate() {
//Validation code goes here
return false;
}

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