Develop Reference

How to give autofocus to a element when another element has it?

I am trying to give a textarea (which is added when you click on a button) autofocus with the autofocus attribute, but when I do that it doesn't works and I get this message on the console:
Autofocus processing was blocked because a document already has a focused element.
So now the question is:
How can I get the focus to the textarea when some other element already has it?

Giving autofocus to a textarea is basically saying "When the page loads, this textarea should be focused"
So focusing another element isn't a problem:
If that error is occurring, just use the .blur() method on the textarea you want to lose focus on. Then do the .focus() method on the one you want focused
function focus1() {
document.getElementById('ele1').focus()
}
function focus2() {
document.getElementById('ele2').focus()
}
<textarea id="ele1"></textarea>
<textarea id="ele2"></textarea>
<button onclick="focus1()">Click to focus inp1</button>
<button onclick="focus2()">Click to focus inp2</button>

After adding the textarea control then set focus to that control.
I thing this will solve your problem.
On button click call addTextArea() function.
<script type="text/javascript">
var cntctrl = 0;
function addTextArea() {
try {
var s = document.createElement('textarea');
cntctrl = cntctrl + 1;
var id = 'txtarea' + cntctrl;
s.setAttribute('id', id);
s.setAttribute('class', "txtareaclass");
s.setAttribute('rows', "4");
s.setAttribute('cols', "100");
document.body.appendChild(s);
document.getElementById(id).focus();
}
catch (e) {
console.log('Adding Textarea failed!.');
console.log('Error: ' + e);
}
return false;
}
</script>

How to enable a button on pasting something using mouse?

I have a textbox and a button. The functionality is that whenever textbox is empty, button is disabled and if not empty then button is enabled. I am doing this using following jQuery code:
$('#user_field').keyup(function(){
if($(this).val().length !=0){
$('#btn_disabled').removeAttr('disabled');
$('#btn_disabled').attr('class', 'upload_button_active');
}
else{
$('#btn_disabled').attr('disabled',true);
$('#btn_disabled').attr('class','upload_button_inactive');
}
})
However, when I am trying to paste input using mouse, the button is not enabling. I have tried binding other mouse events like mousemove, but for that to work we have to move the mouse after pasting. I want to avoid that. Suggest something else.

You should use 'input'
$("#tbx").on('input',function(){
var tbxVal=$(this).val();
if(tbxVal.length===0){
$("#btn").prop("disabled",true);
}else{
$("#btn").prop("disabled",false);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" id="tbx">
<button id="btn" disabled>Button</button>

You can use the paste event and retrieve the value of the input inside a setTimeout
$('#user_field').on('paste input', function() {
setTimeout(() => {
if ($(this).val().length !== 0) {
$('#btn_disabled').removeAttr('disabled');
$('#btn_disabled').attr('class', 'upload_button_active');
} else {
$('#btn_disabled').attr('disabled', true);
$('#btn_disabled').attr('class', 'upload_button_inactive');
}
}, 1000)
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type='text' id='user_field'>
<button id='btn_disabled' disabled='disabled'>Click</button>

Just Call the function on change.
It will take your input event from mouse as well.
$("#textBox").change(function(
var val=$(this).val();
if(val.length===0){
$("#btn").prop("disabled",true);
}else{
$("#btn").prop("disabled",false);
}
});

Textarea not focus after click on button using javascript

Textarea is disable on page load. Textarea will be enable after click on button. I want to add focus on textarea after textarea is enable on button click using javascript.
Here is my code:-
<div id="fav-focus"><textarea name="remark" id="remark'.$value['id'].'" rol="4" cols="20" class="fav-view" disabled="disabled">'.$value['remark'].'</textarea> </div>
<a id="favt_edit" class="editfavorite editfavorite'.$value['id'].' buttonNew greenB normal" title="'.$value['id'].'">Edit</a>
<Script>document.getElementById('favt_edit').onclick = function() {
document.getElementById('fav-focus').focus();
};
</script>
Kindly advice me any solution.

<script>
document.getElementById('favt_edit').onclick = function() {
document.getElementsByName('remark')[0].disabled = false;
document.getElementsByName('remark')[0].focus();
};
</script>

You can use this code for enabling as well as focusing your textarea.
<script>document.getElementById('favt_edit').onclick = function() {
$('#fav-focus').find('textarea').removeAttr('disabled').trigger('focus');
};
</script>
Replace your jquery function with this.It will definately work.

Trigger functions from checkbox on click by clicking on a button

I have a couple of checkboxes and a button. When I click on checkbox - function is triggered. This is the desired behavior but I want to trigger it by clicking on the button. I want to have the possibility to first select checkboxes (I tried with return false and event.preventDefault but these completely switch the selection off) and then by clicking the button - trigger functions from checkboxes. Here is a link to jsfiddle:
http://jsfiddle.net/j93k2xns/6/
So for instance: I can select 3 checkboxes (nothing should happen) and after I click the button - three alerts should appear.
The code:
HTML:
<input type="checkbox" name='check[]' id="first">first</input>
<input type="checkbox" name='check[]'>second</input>
<input type="checkbox" name='check[]'>third</input>
<input type="checkbox" name='check[]'>fourth</input>
<input type="button" value="validate" id="val-button">
JS:
var check_state;
$(document).on('click','input[name="check[]"]', function(e){
if(check_state === true) {
alert('a');
} else {
return false;
}
});
$(document).on('click','#val-button', function(){
check_state = true;
});

There are a few interpretations to his question. If I'm reading it correctly, he wants to bind an arbitrary function to the checkboxes. Clicking the button should fire this event. This is how you can achieve that using custom events in jQuery:
$(function () {
$("input[name='check[]']").bind("myCustomButtonClick", function() {
if(this.checked) {
alert('a');
}
});
})
$(document).on('click','#val-button', function(){
$("input[name='check[]']").trigger("myCustomButtonClick");
});
And the associated jsfiddle: http://jsfiddle.net/3yf7ymos/

$(document).on('click','#val-button', function(){
$( 'input[name="check[]"]' ).each(function( index ) {
if($(this).is(':checked')) {
alert("a");
return true;
}
});
});

If you want to do something when the user checks a checkbox, add an event listener:
$('input[type="checkbox"]').click(function() {
if ($(this).is(':checked')) {
// do something
}
});
If the idea is run a couple of functions after the inputs are checked by clicking on a button:
function myFunction() {
if ($('input[id="something"]:checked').length == 0) {
// do something
} else if ($('input[id="something_2"]:checked').length == 0) {
// do something
}
//and so on..
}
$('#val-button').click(function() {
myFunction();
});

I have a similar inquiry. I have a number of check boxes. Each checkbox is linked to a different URL that opens a PDF form. I want my team to be able to select which forms they need by ticking the checkbox. Once they have done that, I would like a button to trigger the opening of each form based on which check box is checked. I have it so the checkbox upon being checked opens the form right away but it is very distracting. Its preferable they all get opened at once by a "button". Help. I am quite new to JavaScript so may need additional clarity.

Javascript: select the text in the currently focussed input field

I would like to select the text of the input field which currently has focus, so when the user starts typing, the text which is currently in the input field is gone. Can I do this with javascript (or jquery)?
In case the field which currently has focus is not an input field, nothing has to happen.
thanks!
EDIT:
To all the answerers: you all misunderstood (so probably my question was not clear).
I don't want to select the text on the moment the input field gets the focus. I would like to have a javascript function which selects the text of the input field which has the focus at that moment.

Sorry I misunderstood what you were looking for I think that I have a better understanding of it now. Does this do more of what you were looking to acheive?
//If not using 1.7 for jquery you can use bind
$('input, textarea').on({
focusin: function(){
$(this).addClass("focused");
},
focusout: function(){
$(this).removeClass("focused");
}
});
function highlightText()
{
var focused = $('input.focused,textarea.focused');
if (focused.size()) {
focused.get(0).select();
}
}
http://jsfiddle.net/GXFpR/1/

This should work:
<html>
<head>
</head>
<body>
<input type="text" id="theTextBox" onfocus="selectText()" value="some value"></input>
<script type="text/javascript">
function selectText() {
document.getElementById("theTextBox").select();
};
</script>
</body>
</html>

You can check with onfocus and then use this.select() as inline
<input name="" type="text" value="test test" onfocus="this.select()" />
UPDATE: a more universal approach, will add focus to inputs of the text type also input text's that are not readonly
window.onload = setFocus();
or call beneth the last form input field
setFocus();
main
setFocus = function(){
var i = [];
i = document.getElementsByTagName("input");
for(var t=0; t < i.length; t++){
if(i.item(t).type == "text" && i.item(t).readOnly == false){
i.item(t).onfocus = function (){this.select()};
}
}
}

You can try something like this? http://jsfiddle.net/z55UZ/
$("input, textarea").focus(
function()
{
this.select();
}
)
EDIT:
here is an updated fiddle: http://jsfiddle.net/IrvinDominin/z55UZ/2/
In the example is selected the last focused element; but if you look at the code the var childInputHasFocus and whoHasFocus are never setted to false...when you want to stop the selecting feature?
Where you wanna call the function? Because the click event sets the active/focused element as is caller.