I'm struggling to get the behaviour I need - as follows:
A HTML form is pre-populated with a value via jQuery. When the user focuses on the input field I want the form to clear. On blur from the form, the form should repopulate the form with the existing value.
I have a solution that clears and repopulates the form but it fails as soon as anything is typed in.
This is what I have so far:
var x = "Default";
$(function () {
$("input").attr({
"value": x
});
$("input").focus(function () {
$("input").attr({
"value": ""
});
});
$("input").blur(function () {
$("input").attr({
"value": x
});
});
});
https://jsfiddle.net/thepeted/p74kfdt8/6/
If I look in developer tools, I can see the input value is changing dynamically in the DOM, but in the case that the user has typed something in to the form, the display no longer updates.
I'd love to understand why this is happening (ie, why it works in one case and not the other). Also, if there is a better way of approaching the problem.
As pointed out by Stijn, best practice would be to use the placeholder attibute.
However if you do want to use a function for it. I would check on the focus if the value is the default value or not. If so, empty the input, if not, don't do anything.
On blur, you also only want to place the default value back if the value is empty... so check for that aswell.
var x = "Default";
$(function() {
$('input[type=text]').val(x);
$('input[type=text]').on('focus', function() {
var elem = $(this);
if (elem.val() == x)
elem.val('');
}).on("blur", function() {
var elem = $(this);
if (elem.val() == '')
elem.val(x);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" />
Your edited jsfiddle.
updated code:
$("input").blur(function () {
$("input").val(x);
});
Personnaly, I'd use the placeholder attribute as everyone pointed out. If you too are facing the need to support older browsers and some others that do not support the placeholder attribute, use this snippet I've made:
$('input[placeholder]').each(function(){
var $this = $(this);
$this.val($this.attr('placeholder')).css('color','888888');
$this.focus(function(){
if($(this).val() == $(this).attr('placeholder'))
$(this).val('').css('color','');
});
$this.blur(function(){
if($(this).val() == '')
$(this).val($(this).attr('placeholder')).css('color','888888');
});
});
This script will find all inputs with a placeholder attribute, give it's value to the input, and add the correct events. I've left the css calls just to show you where to put the codes to mimic the greyed text like modern browsers do.
Try this code
var x = "Default";
$(function () {
$("input").val(x);
$("input").focus(function () {
$("input").val("");
});
$("input").blur(function () {
$("input").val(x);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<input type="text"/>
Related
I have a website url field that has the value set for returning visitors who have previously filled out the form. If they change the value, then ('keyup blur paste', function() will copy it to a div. If they do not change the value, the ('keyup blur paste', function() does not copy the value to the div
I would like to figure out how to add to this script a function that would also copy the value to the div if they do not change it, because blur only works if they click in the input before they submit the form.
Here is my current script:
$(function () {
$('#Website').on('keyup blur paste', function() {
var self = this;
setTimeout(function() {
var str = $(self).val();
$("#viewer").text(str.replace(/^http\:\/\//, ''));
}, 0)
})
});
If I get you correctly, you want to populate the div on load as well as on keyup/blur/paste? Something like this?
$(function () {
$('#Website').on('keyup blur paste', function() {
var self = this;
setTimeout(function() {
var str = $(self).val();
$("#viewer").text(str.replace(/^http\:\/\//, ''));
}, 0)
});
// just add the line below
$("#viewer").text($('#Website').val().replace(/^http\:\/\//, ''));
});
I've updated the fiddle you created to demonstrate this working: http://jsfiddle.net/8kn4V/2/
on your page load...
$('#mydiv').html('whatever the value of the cookie');
is that what you need? as they mentioned in the comments above, your question is a little confusing.
use val() for input , select and textareas, and use text() for general elements like divs.
First solution
It seems now you are using a timeout of 0. That is not necessary at all, I think. So please check out this Fiddle:
$('#website').on("keyup blur paste", function () {
var s = $(this).text();
$("#viewer").text(s.replace(/^http\:\/\//, ''));
});
Edited solution
Now it seems you also want code that update #viewer from #website even when not triggered.
Here is a second fiddle — I hope you'll give credit if this solves the problem as it stands currently.
Relevant code:
function viewerupdate(me){
var s = me.text();
$("#viewer").text(s.replace(/^http\:\/\//, ''));
}
$('#website').on("keyup blur paste", function () { viewerupdate($(this)) });
var current_viewer = $('#viewer').text();
$('#submit').click(function(){ // assumes in the case that no change was made, that the submission is done through #submit
if($('#viewer').text() == current_viewer )
viewerupdate($('#website'));
});
I am developing web app, I have such a requirement that whenever user click on text inside span i need convert it into input field and on blur i need to convert it back to span again. So i am using following script in one of my jsp page.
Java Script:
<script type="text/javascript">
function covertSpan(id){
$('#'+id).click(function() {
var input = $("<input>", { val: $(this).text(),
type: "text" });
$(this).replaceWith(input);
input.select();
});
$('input').live('blur', function () {
var span=$("<span>", {text:$(this).val()});
$(this).replaceWith(span);
});
}
JSP Code:
<span id="loadNumId" onmouseover="javascript:covertSpan(this.id);">5566</span>
Now my problem is, everything works fine only for the first time. I mean whenever i click on the text inside span for the first time it converts into input field and again onblur it coverts back from input field to normal text. But if try once again to do so it won't work. Whats wrong with above script?
Would be good to change your dom structure to something like this (note that the span and the input are side by side and within a shared parent .inputSwitch
<div class="inputSwitch">
First Name: <span>John</span><input />
</div>
<div class="inputSwitch">
Last Name: <span>Doe</span><input />
</div>
Then we can do our JS like this, it will support selecting all on focus and tabbing to get to the next/previous span/input: http://jsfiddle.net/x33gz6z9/
var $inputSwitches = $(".inputSwitch"),
$inputs = $inputSwitches.find("input"),
$spans = $inputSwitches.find("span");
$spans.on("click", function() {
var $this = $(this);
$this.hide().siblings("input").show().focus().select();
}).each( function() {
var $this = $(this);
$this.text($this.siblings("input").val());
});
$inputs.on("blur", function() {
var $this = $(this);
$this.hide().siblings("span").text($this.val()).show();
}).on('keydown', function(e) {
if (e.which == 9) {
e.preventDefault();
if (e.shiftKey) {
$(this).blur().parent().prevAll($inputSwitches).first().find($spans).click();
} else {
$(this).blur().parent().nextAll($inputSwitches).first().find($spans).click();
}
}
}).hide();
I understand you think that element replacement is a nice thing, however, I would use a prompt to get the text. Why? It is a lot easier and actually a bit prettier for the user as well. If you are curious on how to do it, I show you.
html:
<span class='editable'>foobar</span>
js:
$(function()
{
$('span.editable').click(function()
{
var span = $(this);
var text = span.text();
var new_text = prompt("Change value", text);
if (new_text != null)
span.text(new_text);
});
});
http://jsfiddle.net/qJxhV/1/
First, you need to change your click handler to use live() as well. You should take note, though, that live() has been deprecated for quite a while now. You should be using on() in both cases instead.
Secondly, when you replace the input with the span, you don't give the element an id. Therefore, the element no longer matches the selector for your click handler.
Personally, I would take a different (and simpler) approach completely. I would have both the span and in the input in my markup side by side. One would be hidden while the other is shown. This would give you less chance to make mistakes when trying to recreate DOM elements and improve performance since you won't constantly be adding/removing elements from the DOM.
A more generic version of smerny's excellent answer with id's can be made by slightly altering two lines:
$input.attr("ID", "loadNum"); becomes $input.attr("ID", $(this).attr("ID")); -- this way, it simply takes the current id, and keeps it, whatever it is.
Similarly,
$span.attr("ID", "loadNum"); becomes $span.attr("ID", $(this).attr("ID"));
This simply allows the functions to be applied to any div. With two similar lines added, both id and class work fine. See example.
I have done little change in code, By using this input type cant be blank, it will back to its real value.
var switchToInput = function () {
var $input = $("<input>", {
val: $(this).text(),
type: "text",
rel : jQuery(this).text(),
});
$input.addClass("loadNum");
$(this).replaceWith($input);
$input.on("blur", switchToSpan);
$input.select();
};
var switchToSpan = function () {
if(jQuery(this).val()){
var $text = jQuery(this).val();
} else {
var $text = jQuery(this).attr('rel');
}
var $span = $("<span>", {
text: $text,
});
$span.addClass("loadNum");
$(this).replaceWith($span);
$span.on("click", switchToInput);
}
$(".loadNum").on("click", switchToInput);
jsFiddle:- https://jsfiddle.net/svsp3wqL/
I have a textarea like so,
<textarea id="txtaFilter" cols="45" rows="5"></textarea>
and the following script,
$(document).ready(function () {
$(".selector").bind('change', function () {
var value = $(this).val();
$("#txtaFilter").val($("#txtaFilter").val() + value);
$(this).children('option:eq(0)').prop('selected', true);
});
});
where ".selector" is a class applied to two dropdownlists.
When I chose a value on the dropdown, it appears to do nothing, but after looking at the debugger in chrome it is changing the value just not displaying it.
Does anyone know why this is? Is there something special I'm missing about the .val() property?
Problem/Solution:
I forgot that there are multiple "#txtaFilter"'s on the page when I removed the $(this).siblings("#txtaFilter"), So it was accessing the hidden one instead of the visible one. Sorry about that, guess I was wrong on the question too :/
You can use val method:
$("#txtaFilter").val(function(i, oldVal){
return oldVal + value
});
Use .val() to get the text of a textarea.
$(document).ready(function () {
$(".selector").bind('change', function () {
var value = $(this).val();
var txtaFilter = $("#txtaFilter");
txtaFilter.val(txtaFilter.val()+value);
$(this).children('option:eq(0)').attr('selected', true);
});
});
I know that there is the change event handling in jQuery associated with an input of type select. But I want to know if the user has selected another value in the select element ! So I don't want to run code when the user select a new element in the select but I want to know if the user has selected a different value !
In fact there are two select elements in my form and I want to launch an ajax only when the two select elements has been changed. So how to know that the two elements has been changed ?
You can specifically listen for a change event on your chosen element by setting up a binding in your Javascript file.
That only solves half your problem though. You want to know when a different element has been selected.
You could do this by creating a tracking variable that updates every time the event is fired.
To start with, give your tracking variable a value that'll never appear in the dropdown.
// Hugely contrived! Don't ship to production!
var trackSelect = "I am extremely unlikely to be present";
Then, you'll need to set up a function to handle the change event.
Something as simple as:-
var checkChange = function() {
// If current value different from last tracked value
if ( trackSelect != $('#yourDD').val() )
{
// Do work associated with an actual change!
}
// Record current value in tracking variable
trackSelect = $('#yourDD').val();
}
Finally, you'll need to wire the event up in document.ready.
$(document).ready(function () {
$('#yourDD').bind('change', function (e) { checkChange() });
});
First of all you may use select event handler (to set values for some flags). This is how it works:
$('#select').change(function () {
alert($(this).val());
});
Demo: http://jsfiddle.net/dXmsD/
Or you may store the original value somewhere and then check it:
$(document).ready(function () {
var val = $('#select').val();
...
// in some event handler
if ($('#select').val() != val) ...
...
});
First you need to store previous value of the selected option, then you should check if new selected value is different than stored value.
Check out the sample!
$(document).ready(function() {
var lastValue, selectedValue;
$('#select').change(function() {
selectedValue = $(this).find(':selected').val();
if(selectedValue == lastValue) {
alert('the value is the same');
}
else {
alert('the value has changed');
lastValue = selectedValue;
}
});
});
You can save the value on page load in some hidden field.
like
$(document).ready(function(){
$('hiddenFieldId').val($('selectBoxId').val());
then on change you can grab the value of select:
});
$('selectBoxId').change(function(){
var valChng = $(this).val();
// now match the value with hidden field
if(valChng == $('hiddenFieldId').val()){
}
});
$("select").change(function () {
var str = "";
$("select option:selected").each(function () {
str += $(this).text() + " ";
});
$("div").text(str);
})
.change();
http://docs.jquery.com/Events/change
I'm trying to get my <input.../> fields to go blank on focus, and if on focus out they're still blank, revert them to their original values.
I would've thought this would work, but apparently not:
$('input').focus( function() {
var init_value = $(this).val();
$(this).val('');
});
$('input').focusout( function() {
var new_value = $(this).val();
if(new_value == "") {
$(this).val(init_value);
}
});
Any alterations/advice to get it working would be most appreciated ;)!
You should consider using the HTML5 placeholder attribute as a first option.
http://diveintohtml5.ep.io/forms.html#placeholder
With jQuery, you could modify your original script like this:
$('input').focus(function() {
$(this).val('');
});
$('input').focusout(function() {
if($(this).val('')){
$(this).val('Enter something');
}
});
Example: http://jsfiddle.net/jasongennaro/8bJcQ/
EDIT
Here is a revised script to deal with the situation as mentioned in your comment:
As for the jQuery option, that simply wouldn't do as it needs the
original value= value. I have perhaps 8 different text fields, the
instructions for which are the value, e.g. "Enter your email address",
"Enter your url", etc :(.
$('input').each(function(){
var a = $(this).attr('value');
$(this).focus(function() {
$(this).val('');
});
$(this).focusout(function() {
if($(this).val('')){
$(this).val(a);
}
});
});
Example 2: http://jsfiddle.net/jasongennaro/8bJcQ/3/
There is an easier method of doing this assuming a modern browser is used. Simply add the attribute placeholder="some text" and the browser will handle all this for you. If you must support older browsers, try this:
var init_value;
$('input').focus( function() {
init_value = $(this).val();
$(this).val('');
});
$('input').blur( function() {
var new_value = $(this).val();
if(new_value == "") {
$(this).val(init_value);
}
});
Your problem was the scope of init_value. You defined it inside an anonymous function, and could not access that value from a second anonymous function. To fix this you simply need to define init_value outside the scope of each event handler.
Also notice how I used .blur() instead of .focusout(). The jQuery API explains the difference between the two.