I want the value of the input but it always alert 0, how can I get the value of input
below, I cant get the value - the value of input is just numbers
$(document).ready(function() {
var text = Number($("#text").val())
$("#btn").click(function() {
$("#p").text(text)
})
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="text" id="text" placeholder="Enter a number" class="txt"><br>
<button id="btn">RUN</button>
<p id="p"></p>
The problem is that you get the variable value when the page loads and you never get it later. You need to get it whenever you click the button. I have edited it for you and now it works.
$(document).ready(function(){
$("#btn").click(function(){
var text = Number($("#text").val())
$("#p").text(text)
})
})
Did you added a js library on your page?
<!DOCTYPE html>
<html>
<body>
<head>
<script src="//code.jquery.com/jquery-3.3.1.js"></script>
</head>
<input type="text" id="text" placeholder="Enter a number" class="txt"><br>
<button id="btn">RUN</button>
<script>
$(document).ready(function() {
$("#btn").click(function() {
alert($("#text").val());
})
});
</script>
</body>
</html>
Related
JQuery Part
I just started using JQuery. First I wanted to create a a input box with an button that alerts the text that is in that box. This is the way I wanted to do that.
$(document).ready(function() {
$('#hit').click(function() {
alert($('#term').val());
});
});
That is the code in the html body part. Here im not sure if I have to declare the id with an # or not. I tried both but It didnt work for both.
My Code
<!DOCTYPE html>
<html>
<head>
<title>Button Event</title>
<script src="cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"> $(document).ready(function() { $('#hit').click(function() { alert($('#term').val()); }); }); </script>
</head>
<body> <input id="term" type="text" value="enter your search"> <button id="hit" type="button" name="Button">Search</button> </body>
</html>
I am really new to JavaScript and Jquery. When I run this code there are no errors or something like that in the console just blank. The Button and Input field are on the website but when I enter something and click the button after that nothing happens. That´s why im sure there are some mistakes in that code.
$(document).ready(function() {
$('#hit').click(function() {
alert($('#term').val());
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input id="term" type="text" value="enter your search" />
<button id="hit" type="button" name="Button">Search</button>
here has worked, do you have imported a jquery library?
Resolution with your code:
<!DOCTYPE html>
<html>
<head>
<title>Button Event</title>
</head>
<body> <input id="term" type="text" value="enter your search"> <button id="hit" type="button" name="Button">Search</button>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
$(document).ready(function() { $('#hit').click(function() { alert($('#term').val()); }); });
</script>
</body>
</html>
How to detect the changes in input values when it is dynamically changed.
as the change on txt2 clear the value in txt1 . I need to detect that it has cleared or changed.
Onchange does not do that.
<input id="txt1" type="text" onchange="SetDefault();" onpaste="this.onchange();" oninput="this.onchange();">
<br>
<input id="txt2" type="text" onchange="SetDefaultSecond();" onkeyup="this.onchange();" onpaste="this.onchange();" oninput="this.onchange();">
<script>
function SetDefault(){
alert("Change1");
}
function SetDefaultSecond(){
$("#txt1").val('');
alert("Change2");
}
</script>
You can manually trigger the input event when you clear the first input like this:
<input id="txt1" type="text">
<br>
<input id="txt2" type="text">
<script>
$("#txt1").on("input", function() {
alert("Change1");
});
$("#txt2").on("input", function() {
$("#txt1").val('').trigger('input');
alert("Change2");
});
</script>
jsFiddle here: https://jsfiddle.net/dr0oabj1/
you need to use oninput event to capture any change to an input. it triggers every time the value changes due to typing/pasting etc. difference between onchange & oninput is onchange only triggers after focus goes off the input where as oninput triggers every time values changes due to any reason.
function SetDefault(){
alert("Change1");
}
function SetDefaultSecond(){
$("#txt1").val('');
alert("Change2");
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<input id="txt1" type="text" oninput="SetDefault();" />
<br>
<input id="txt2" type="text" oninput="SetDefaultSecond();"/>
Try this :
$(document).ready(function(){
$("#txt2").on("input",function(){
$("#txt1").val('');
console.log("Change2");
})
$("#txt1").on("input",function(){
console.log("Change1");
})
})
Final code :
<!DOCTYPE html>
<html lang="en">
<head>
</head>
<body>
Text 1 : <input id="txt1" type="text">
<br><br>
Text 2 : <input id="txt2" type="text">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("#txt2").on("input",function(){
$("#txt1").val('');
console.log("Change2");
})
$("#txt1").on("input",function(){
console.log("Change1");
})
})
</script>
</body>
</html>
Kodies answer is right; just try this ultra simple example and then proceed to Detect all changes to a (immediately) using JQuery
<input id="txt1" type="text" oninput="console.log('input')" onchange="this.oninput()">
<br>
<button onclick="eval(this.textContent)">console.log('clearing'); txt1.value=''</button>
<br>
<button onclick="eval(this.textContent)">console.log('clearing <b>and triggering</b>'); txt1.value=''; <b>txt1.onchange()</b></button>
use this in txt2
oninput="changeClass(txt2);"
and in script
function changeClass(text) {
if(text.value==''){
//code for clear txt1
}
}
I want to enter names using input field and then show those names dynamically on the click of a button. Can anyone provide me with a code sample that does that?
What you want to achieve is fairly easy to do with jquery. However while asking a question first give it a try and then ask if you dont get it.
$(function(){
$('#submit').on('click', function(){
var value = $('#name').val();
var text = '<p>' + value + '</p>';
$('#display').append(text);
})
})
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" name="inputNames" id="name">
<button id="submit">Submit</button>
<div id="display"></div>
<html>
<body>
<input type="text" name="Names" id="Names">
<input type="button" value="Click" onclick="SendName();" name="">
<p id="ShowNames"></p>
<script type="text/javascript">
function SendName() {
var d= document;
var InputNames = d.getElementById("Names").value;
var ShowNames = d.getElementById("ShowNames");
ShowNames.innerHTML +=InputNames+"</br>";
}
</script>
</body>
</html>
This is really strange. I am trying to get the value of a text field by id but what I am seeing in console is an empty string. Below is my complete code. All scripts are included correctly.
<html>
<head>
<meta charset="UTF-8">
<title>Awok- Scrapper</title>
<script src="jquery.js" type="text/javascript"></script>
</head>
<body>
<div id="form">
<form>
<input type="text" name="query" id="test"/>
<input type="button" id="send" value="Submit" />
</form>
</div>
<div id="result">
</div>
<script>
$(function () {
var query = document.getElementById('test').value;
$('#send').click(function () {
console.info(query);
});
});
</script>
</body>
Since you use jQuery you can use it like this:
$('#send').click(function () {
var query = $('#test').val();
console.log(query);
});
$('#send').click(function () {
var query = $('#test').val();
console.info(query);
});
You tried to get value of query which has modified at the time of page load.
I'm new to Javascript. Can I show direct data from an HTML form on the same page. My code is here:
<html>
<head>
<title></title>
</head>
<script>
document.getElementById("btn").onclick = avc;
function avc(){
var a = document.getElementsByName("firstname").value;
document.getElementsByName("abc").innerHTML = a;
}
</script>
<body>
<form method="post">
First name: <input id="fname" type="text" name="firstname"><br>
<input id="btn" type="submit">
</form>
<div name="abc"></div>
</body>
</html>
Using the ID for the element would also work when getting the value.
var a = document.getElementById('fname').value;
Yes you can with
<script>
document.getElementById('abc').innerHTML=document.getElementById('fname').value;
</script>
at the end
if you want that every time you write something in text box changes the value in div abc try this:
<html>
<head></head>
<body>
<form method="post">
First name: <input id="fname" type="text" name="firstname" onKeyUp="f()"><br>
<input id="btn" type="submit">
</form>
<div id="abc"></div>
<script>
function f() {
document.getElementById('abc').innerHTML=document.getElementById('fname').value;
}
f(document.getElementById('fname').value);
</script>
</body>
</html>
Yes, but you need to subscript the correct element like so...
var a = document.getElementsByName("firstname")[0].value;