How can I check if the value of an input box is not the same after blur?
$("#username").on('blur', function() {
$("#usertext").append("new input<br>");
})
Check this jsFiddle: https://jsfiddle.net/xztptsdg/
Let's think that I enter "Josh" in input and after blur, will append new input box. But, user can "re-blur" the username input, and will append other input.
I want to check if the value is the same, not append new input.
You may use change instead of blur, for example:
$("#username").on('change', function() {
$("#usertext").append("new input<br>");
});
So, there is no need to check if the value changed or not because the change event is sent to an element when its value changes.
See this fiddle
You can keep a global variable to store the current value of the textbox and then check whether the entered value is the same as the previous one. If not, then append the new input text and also set the global variable with the new one. Below is the Javascript that does this.
JS
var txt = "";
$("#username").on('blur', function() {
if (txt != this.value) {
$("#usertext").append("new input<br>");
txt = this.value;
}
})
I would suggest you to use change(). According to the docs
The change event is sent to an element when its value changes.
See the fiddle and below is the JS code with change().
$("#username").change(function() {
$("#usertext").append("new input<br>");
});
You can do it like following snippet.
var text = '';
$("#username").on('blur', function() {
if(this.value != text){
text = this.value;
$("#usertext").append('new input<br>');
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" name="username" id="username">
<br>
<span id="usertext"></span>
Related
I have a text input. It has a change and an input listener. In the input listener, I delete the value of the input, if it is "delete". The change listener simply alerts "Changed.".
Current behaviour:
There is no "Changed." alert when I type "delete" and stop editing, because the comparison base is changed as well.
Desired behaviour:
I want to see the "Changed." alert based on the value at the start of the editing, ignoring all the programatic changes made during the modification.
What is the simplest way of doing this?
Playgorund:
Click the input.
Delete the content.
Type "delete".
See how the text is deleted.
Click somewhere else.
See how the "Changed." alert is not displayed.
var input = document.querySelector('input');
input.addEventListener('change', function() {
alert('Changed.');
});
input.addEventListener('input', function() {
input.value = input.value.replace(/^delete$/, '');
});
<input value="example" />
My current solution is to add an attribute that I store the initial value in on each focus event, and compare it to the current value at the time of the blur event.
var input = document.querySelector('input');
input.addEventListener('focus', function() {
this.setAttribute('data-value-on-focus', this.value);
});
input.addEventListener('blur', function() {
if (this.getAttribute('data-value-on-focus') !== this.value) alert('Changed.');
});
input.addEventListener('input', function() {
this.value = this.value.replace(/^delete$/, '');
});
<input value="example" />
After an a user presses enter inside an input field, I clear the value by document.getElementById('text').value = "";
As Im using a spacebars to iterate over an array, this displays multiple input fields with the same id of course id='text'
After typing in the first input field and pressing return key, the input field clear.
However, this is not the case for the proceeding inout fields. I understand document.getElementById only finds the first id.
How can I make this the input value is cleared for all input fields.
'keydown #text': function(event, template) {
if ((27 === event.which) || (13 === event.which)) {
event.preventDefault();
document.getElementById('text').value = "";
}
},
Never ever use ID for multiple elements. ID is unique and it can only be present once in the HTML document. Use class instead or regular HTML element selector:
'keydown input[type="text"]': function(event, template) {
if ((27 === event.which) || (13 === event.which)) {
event.preventDefault();
//this should delete value from the input
event.currentTarget.value = "";
}
}
And in HTML:
<input type="text" />
<input type="text" />
Solution:
You can iterate over all the matches and clear their value.
$("[id='text']").each(function(){
$(this).val("");
});
working example on jsfiddle, initially commented by #abdullah
Recommendations:
It is not good idea to use same id for multiple elements, id must be unique.
Use Jquery libary if you are including it $("#id") much simpler and neat than document.getElementById("id")
I would place the event listener on the parent (the form for example). And instead of
document.getElementById('text').value = "";
by
var inputs = event.currentTarget.querySelector('input');
Array.prototype.forEach.call(inputs , function(el, i){
el.value = '';
});
Now, If I hit the button, it clears all in the input field, and it automatically inputs "#marry" to it.
But, I don't want it to be cleared:(
What if I want to add "#marry" to the end of the strings that already exists in the input field?
How can I customize my javascript part?
Input field
<textarea class="box text_area" cols="10" id="input" name="comment[body]"></textarea>
button
<a href="#topic" id="username" value="#marry”><span class='btn'>reply</span></a>
javascript
$(document).on('click', 'a#username', function() {
$(".box#input").val($(this).attr('value'));
}
val() has a callback with the arguments index and value, you can use that to easily add something to the value.
$(".box#input").val(function(_, val) {
return this.value + 'some extra string';
});
$(document).on('click', 'a#username', function() {
var self = this;
$(".box#input").val(function(_, val) {
return val + self.value;
});
});
First of all adeneo's answer is good and you should read it. Here is an alternative solution that does not use jQuery:
I assume that both these elements are a part of a form. Let's say for instance the form has an ID of "post". We can access it using document.forms and then its fields as such:
var input = document.forms.post["comment[body]"];
Now, we can add to its value whenever the button is clicked. First select username with getElementById or querySelector and then add the event:
username.addEventListener("click", function(ev){
input.value += ev.target.value;
});
Or with jQuery (this also delegates if the element is not in the DOM yet):
$(document).on('click', 'a#username', function() {
input.value += this.value;
});
It might be desirable to append an extra space between the current text and the username.
append #marry at the end of text area. you can use bellow code its working fine.
$(document).on('click', 'a#username', function () {
var txtvalue = $(".box#input").val();
$(".box#input").val(txtvalue + $(this).attr('value'));
});
see jsfiddle link http://jsfiddle.net/F6mkh/1/
I facing problem with my jquery, on showing input text based on input value.
Here is the JS fiddle demo :
http://jsfiddle.net/Ltapp/364/
When I try to input #hotmail, the input box will show. But when I want to type some text in the #hotm input box, it will hide again.
JS code :
$(window).load(function(){
var myString = '#hotmail';
$('#hotm').hide();
$("input").keyup(function () {
var value = $(this).val();
if($(this).val().match(myString)) {
$('#hotm').show();
} else {
$('#hotm').hide();
}
});
});
It's because your selector $("input") affects both input elements. I have updated it to the $("input:first") selector instead. JsFiddle here
$("input:first").keyup(function () {
var value = $(this).val();
if(value.match(myString)) {
$('#hotm').show();
} else {
$('#hotm').hide();
}
});
As many has said, you are binding the event on all the inputs I did a little change:
$(function(){
var myString = /#hotmail/ig;
$("#check").bind('keyup checkvalue', function() {
$('#hotm')[myString.test(this.value) ? 'show' : 'hide']();
}).trigger('checkvalue');
});
using regex if you are using #HoTmAil it will also hit on that, and also added a custom event checkvalue to see if #hotm should be visible on for example a postback on the form you might be using.
demo: http://jsfiddle.net/voigtan/xjwvT/1/
You're affecting all inputs. Either give each one a unique ID / Class or use the jQuery $(this) method.
See JSFiddle Here:
http://jsfiddle.net/Ltapp/366/
<input type="text" id="firstinput"/>
<p id="secondinput"><input type="text"/></p>
var myString = '#hotmail';
$('#secondinput').hide();
$("#firstinput").keyup(function () {
var value = $(this).val();
if($(this).val().match(myString)) {
$('#secondinput').show();
} else {
$('#secondinput').hide();
}
});
use this for your if part :
if($(this).val().match($(this).val().substr(0,strlen($(this).val())))
it's because the new box also = "input"; if you give the hotmail textbox it's own id, it won't hide
<input id="hotmail" type="text"/>
and then
$("#hotmail").keyup(function () {...});
I would like a span to update when a value is entered into a text field using jquery.
My form field has a text box with the name "userinput" and i have a span with the id "inputval".
Any help would be greatly appreciated.
UPDATE:
although you marked this as the correct answer, note that you should use the keyup event rather than the change event or the keydown
$(document).ready(function() {
$('input[name=userinput]').keyup(function() {
$('#inputval').text($(this).val());
});
});
Try the following, you have to call again keyup() to trigger for the last char:
$(".editable_input").keyup(function() {
var value = $(this).val();
var test = $(this).parent().find(".editable_label");
test.text(value);
}).keyup();
Try this. Be sure that you understand what is going on here.
// when the DOM is loaded:
$(document).ready(function() {
// find the input element with name == 'userinput'
// register an 'keydown' event handler
$("input[name='userinput']").keydown(function() {
// find the element with id == 'inputval'
// fill it with text that matches the input elements value
$('#inputval').text(this.value);
}
}
$(function() {
$("input[name=userinput]").keydown(
function() {
$('#inputval').text(this.value);
}
)
})