I have a html form full of inputs and I'd like to validate if it has no content using change event. I wanna do something like "when I tab this field, focus it and put a a sign if it be empty".
Try required validation:
<input type='text' required value="some text">
This may be sufficient.
Related
I have these inputs that take the values of a from a in my table when I click on a row. I want to make it so that the user cannot change the input themselves but want to bring values into them when a user clicks a table row. I will be passing these inputs in as a form. I know that when the input is like this:
that it will not be updated. Is there any other way to do it with an input. Is there a different type of tag I can use that can be passed through a form?
Rather than a read-only <input>, I'd go with a combination of a display element and a hidden form element. Something like:
<div id="my-display">This is a value</div>
<input id="my-input" name="my-input" type="hidden" />
And in the code update both:
$('#my-display').text(yourValue);
$('#my-input').val(yourValue);
You can style the display to the user however you like and don't have to worry about whether or not it "de-activates" the form input.
If you really want it to be an inactive input, you can use the same approach:
<input class="my-input" type="text" disabled />
<input class="my-input" type="hidden" name="my-input" />
Which may even save you a line of code here, since both can now use .val():
$('.my-input').val(yourValue);
Try disabled keyword as here
<div id="my-display">This is a value</div>
<input id="my-input" name="my-input" type="text" disabled/>
You can change the value by javascript as below:
document.querySelector('#my-input').value = 'the value you want to enter by javascript';
I'm trying to stay away from JQuery for this one (nothing against JQuery, I just don't want to load a huge library into this project for something small like this).
I'm curious how I might tell HTML5 to recheck all the required input fields in a given form. For example, I have this form (albeit slightly more complicated but you get the point):
<form action="here" onsubmit="check()">
<input required name="something">
<input type="submit">
</form>
If I don't have anything in that required field, HTML5 shows a popup error, something to the effect of "Please fill in this required field". What is stopping the user from putting in a single space, or some nonsense character like % or >? I'd like to partially validate this client-side (in addition to server side) so it isn't particularly inconvenient when the page redirects to the form submission page and then shows the error, and then goes back to the form, prompting the user to enter everything over again.
Assuming in my onsubmit function check I've removed all whitespace and/or nonsense characters from the ends of the string, how can that function then tell HTML5 to recheck the form to see if the required fields are still not empty?
Instead of onsubmit="check()" use addEventListener.
Now you can do everything with input data.
document.getElementById("submit").addEventListener("click", function(event){
var something = document.getElementById("something").value;
document.getElementById("something").value = something.replace(/[^A-Z0-9]/ig, "");
});
<form action="here">
<input required name="something" id="something">
<input type="submit" id="submit">
</form>
try to use regexp pattern (e.g. exclude white chars: [^\s]*, allow only letters [A-Za-z]*, ...)
<form action="here" onsubmit="check()">
<input required pattern="[^\s]*" name="something" >
<input type="submit">
</form>
I have an input with type=password which I want to show stars like an input with type=text.
<input type="password" name=""/>
My purpose is to click on the input box when calling the input password when the keyboard, using a lot of methods can not be achieved, so I would like to try this way.
Prepare CSS for showing Password stars like normal stars.
look into this given reference CSS script .i think it will help.
I have the following code :
<input type="text" id="productCode" name="productCode" style="min-height: 42px;" onChange="ajaxrequest_provideProductListOnHit('protected/snippet/snippet_provideProductListOnHit.php', 'ajaxOnProductHit'); return false;" required="required" autofocus />
The problem is that :
The autofocus is not working, I'm using it in this input box only.
Actually the purpose of this input box is to get the field autofocussed so that a barcode scanner could input the productCode.
Now as you can see, my onChange event handler is not going to work here since the barcode scanner apart from the product code, inputs too.
So I need a solution here which autofocuses and once the barcode scanner inputs value in the field, calls for the mentioned ajax function.
html:
<input type="text" id="productCode" name="productCode" style="min-height: 42px;" required="required" autofocus />
js:
var pc = document.getElementById('productCode');
pc.onblur = function () {
ajaxrequest_provideProductListOnHit(
'protected/snippet/snippet_provideProductListOnHit.php',
'ajaxOnProductHit'
);
}
pc.focus();
i use onblur, because onchange would trigger after EVERY change you make (e.g. typing into the text-field will trigger after every key).
you could also provide some custom-logic, e.g. recognize a certain length
Yes you where right, the problem was that I was using autofocus on a different preceding form field which made this particular field of this particular form non-autofocus. So I learned that in a page with multiple forms loaded in to the DOM, only the first one with auto-focus will work. Fool of me to think otherwise.
How to send enter from javascript to site?
What I real need is to send text to site like filehippo.com in search box, and press enter to search for those text.
So piece of code from site is:
<div id="searchbox">
<form name="f" action="/search">
<input style="color: #999" type="text" id="q" name="q" maxlength="150" value="Search..." onfocus="javascript:clearInputValue('q', 'Search...')" onblur="javascript:setDefaultIfEmpty('q', 'Search...')">
<input type="submit" id="search-submit" value="GO" onclick="javascript:submitQuery('q', 'Search...')">
</form></div>
And my simple code look like this:
javascript: document.getElementById('q').focus();document.getElementById('q').value='Winrar';document.getElementById('f').item(0).click();
And those script just put focus on search box and send text to them, but I need also to do automatically search (send enter), how to do that?
document.getElementById('f').item(0).click(); -> dont work
What I need is to simulate click of mouse, by enter, cause can't send click to element that work properly.
Is it possible to send enter with text?
Use document.f.submit(); to submit the form.
The problem is that there are multiple forms named 'f'
javascript:document.f[0].submit();
So the fully functional line would be:
javascript:document.getElementById('q').value='Winrar';document.f[0].submit();
Use onkeypress attribute of input element.