add field text to the <p> after .change() with jquery - javascript

I am new to jquery. What I want to do is to change the "p" value everytime user changes the input field with syntax like "Input changed to: " and then the value from input field. My code doesn't work. Anyone could explain to me why?
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("#myinput").change(function() {
var str = $("#myinput").val();
$( "p" ).text(str);
});
});
</script>
</head>
<body>
<input type="text" id="myinput">
<p> Text changed to: </p>
</body>
</html>

The change event will run the function when the textbox changes focus (i.e mouse leaves the textbox). To run the function every time the user types a button, try the keyup event.
$(document).ready(function(){
$("#myinput").keyup(function() {
var str = $("#myinput").val();
$( "p" ).text(str);
});
});
Heres a working example: https://jsfiddle.net/8wra05sy/

okay the solution was simple. I should have used the .append() function instead of .text().

Related

JQuery trigger a keydown event first

Before asking this, I did some research on event capturing and bubbling. However, it still does not solve my problem.
I am writing an userscript for this website. Basically, I cannot change the website's code and I can only change my own userscript's code. The website has the window capture the event before my script can get it.
Here is a simplified example:
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
//I cannot change this code (it is part of the webpage):
$("p")[0].addEventListener("click",function(){
alert("p");
});
$(window)[0].addEventListener("click",function(){
alert("window");
},true);
//I can change this code (it is part of my userscript):
$("body")[0].addEventListener("click",function(){
alert("body: I want to come first");
});
});
</script>
</head>
<body>
<p>Click Here</p>
</body>
</html>
Edit: Clarification
for this example, I would want the "body" alert to come first, without disabling the "window" or "p" alert. So I would want the result to be either:
"body", "window", "p"
or
"body", "p", "window"
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("body")[0].addEventListener("click",function(){
alert("body: I want to come first");
});
window.RemoveEventListener('click',alert,true);
//I cannot change this code (it is part of the webpage):
$("p")[0].addEventListener("click",function(){
alert("p");
});
$(window)[0].addEventListener("click",function(){
alert("window");
},true);
//I can change this code (it is part of my userscript):
});
</script>
</head>
<body>
<p>Click Here</p>
</body>
</html>
You can using this as i have disabled the event alert and added your script at the starting of the script tag.

Jquery Selectbox get the value when selected and set to textfield

Hi I am new to javascript, html and jquery. I would really appreciate any help or suggestion thanks in advance. I am trying to get the value of my jquery select box and set the value to the textfield everytime they select something in the selectbox it will automatically change the value of text box. I am using the code below but I am just wonderingw what seems to be wrong in the code
<!DOCTYPE html>
<html>
<script type="text/javascript">
$('#loc').change(function(){
var val = $('#loc').val();
$("#com").val(val);
});
</script>
</html>
You means the innerHTML of option not value?
Try this:
<!DOCTYPE html>
<html>
<script type="text/javascript">
$('#loc').change(function(){
var val = $( "#loc option:selected" ).text();
$("#com").val(val);
});
</script>
</html>

onchange event of text box not working if i change text value dynamically

Onchange Event Fired when i change on textbox but when i am trying to change textbox value dynamically it doesnot fired why?
here is my simple demo when i click on button i changed textbox value dynamically but still textbox onchange event doesnot fired.
<!DOCTYPE html>
<html>
<head>
<title>Page Title</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
</head>
<body>
<h1>My First Heading</h1>
<p>My first paragraph.</p>
<input type="text" id="txtno" value="" onchange="javascript:alert('Hi');">
<input type="button" id="btnadd" value="ClickMe">
<script>
$(document).ready(function(){
$("#btnadd").click(function(){
$("#txtno").val('Hello');
});
});
</script>
</body>
</html>
Changing value of input via JS will not trigger .onChange events. You must trigger it manually
$('#room_1').trigger('change');
I don't see where you change input field value in your code.
The 'change' event is only fired on controls when the user commits a value change. If you make changes to a field programatically then you need to trigger the 'change' event.
In this case:
<script>
$(document).ready(function(){
$("#btnadd").click(function(){
$("#txtno").val('Hello').trigger('change');
});
});
</script>

How to get the selected element in jQuery event delegation?

I've been trying to understand jQuery delegation by writing a short script, but I encountered 2 problems.
<!DOCTYPE html>
<html>
<head>
<script src="jquery.min.js"></script>
</head>
<body>
<input type="text" id="text" />
<div id="msg"></div>
<script>
function showMsg() {
if ($("#text").val() === "") {
$("#msg").html("Your input is empty");
} else {
$("#msg").html("You have entered something")
}
}
$("#text").on("blur", showMsg());
</script>
</body>
1). This event delegation doesn't work as expected, the message "Your input is empty" always shows itself indefinitely. How to fix this?
2). In the showMsg() function I have to explicitly use $("#text") for the script to work, if I use $(this) it won't work. What if I have a lot of input fields that need to use this function, is it possible to uniformly define the function so that those input fields can use it without having to change anything in the function?
All you need to do is change
$("#text").on("blur", showMsg());
to
$("#text").on("blur", showMsg);
This will also fix your $(this) problem. You can set that back now.

Jquery change() not working

Hi everyone I am new to jquery. I am facing a problem with change function I jquery
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js">
</script>
<script>
$("input").change(function(){
alert("The text has been changed.");
});
</script>
</head>
<body>
<input type="text">
<p>Write something in the input field, and then press enter or click outside the field.</p>
</body>
</html>
I am not getting an alert box when I press it outside the textbox. Please help me to resolve this issue :D
You are trying to add a change handler to an element before it is added to the dom. You can use dom ready callback to delay the script execution till all the elements are loaded to the dom
jQuery(function($){
$("input").change(function(){
alert("The text has been changed.");
});
})
Demo: Fiddle
you can also try this :
$(function() {
$("input").change(function(){
alert("The text has been changed.");
});
})
you can also try this :
$(document).ready(function(){
$("input").change(function(){
alert("The text has been changed.");
});
});
Put your code inside the:
$(function(){
// Your code
});
The script will wait the DOM ready to start.

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