This question already has answers here:
Input value is a string instead of a number
(4 answers)
Closed 3 months ago.
If you run the code snippet below and type (anything) into the input, the input will "follow along" with your text input, and not just show the first few characters indefinitely.
I'm wondering if this is possible to achieve if the input value is changed programmatically, in this example, the "Update Input" button.
const updateInput = () => {
const input1 = document.getElementById('input1');
input1.value += (Math.random()*1000).toString();
}
<input id="input1" style="width:50px" />
<button onclick="updateInput()">Update Input</button>
edit: This question has nothing to do with Input value is a string instead of a number
You need to focus it and then set selection range
const updateInput = () => {
const input1 = document.getElementById('input1');
input1.value += Math.random()*1000;
input1.focus()
input1.setSelectionRange(input1.value.length, input1.value.length);
}
<input id="input1" style="width:50px" />
<button onclick="updateInput()">Update Input</button>
Related
This question already has answers here:
Restrict input type="number" to its min or max if it is out of range
(3 answers)
Restrict user to put value in range in html input (type = number)
(4 answers)
HTML number input min and max not working properly
(20 answers)
Closed 4 months ago.
I'm trying this min max input type number but it doesn't work when the user manually type.
So I just disabling the button I have.
Is there's another way to do it without disabling the button like I did?
const ck = document.getElementById('btn');
var inp = document.getElementById('inp');
ck.addEventListener('click', function (){
alert(inp.value);
})
inp.addEventListener('keyup', function (){
var att = this.getAttribute("max");
var vl = this.value;
if (vl > att){
ck.disabled = true;
}else{
ck.disabled = false;
}
})
<input type="number" id="inp" min="1" max="5" value="1"/>
<button id="btn">Button</button>
This question already has an answer here:
Why is the value of my input always empty if I store it in a variable?
(1 answer)
Closed 12 months ago.
I want the value of the text input logged to the console but when I open the page the console.log() is empty. Why is this?
<input type="text" id="word"/>
//JavaScript
var newWord = document.getElementById("word").value;
console.log(newWord);
Ensure to add an event handler.
Add an onchange event listener to input element.
function func() {
var newWord = document.getElementById("word").value;
console.log(newWord);
}
<input type="text" id="word" onchange='func()'/>
You will need to enter a value to your input or add a default value
<input type="text" id="word" value="Hello"/>
var newWord = document.getElementById("word").value;
console.log(newWord);
This will log the value
Use .addEventListener to run a function when a change event is fired - This will run your function whenever the value in the input is updated and the focus is removed from the input box
document.getElementById('word').addEventListener('change', function () {
let newWord = this.value;
console.log(newWord);
});
<input type="text" id="word"/>
Or, you could use the input event, which will fire as soon as the input is changed
document.getElementById('word').addEventListener('input', function () {
let newWord = this.value;
console.log(newWord);
});
<input type="text" id="word"/>
I cannot get your question, but according to my understanding, you need to use a function to get the value of input box, when an event occurs. here is the code something like this.
<!DOCTYPE html>
<html>
<body>
<p>A function is triggered when the user is pressing a key in the input field.</p>
<input type="text" id="myinput" onkeypress="myFunction()">
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById('myinput').value;
document.getElementById('demo').innerHTML = x;
}
</script>
</body>
</html>
This question already has answers here:
How do I get the value of text input field using JavaScript?
(16 answers)
Closed 5 years ago.
I have no idea how to get value from input box. Right now when I click BET button it just subtracts 100, I want to achieve so when I enter the value in the text box and hit bet it'll subtract the value which I've entered from the balance. Here is my code:
HTML:
<div>
<input type="text" value=0 name="betAmount">
<button class="betBTN">BET</button>
</div>
JS:
document.addEventListener('DOMContentLoaded',function() {
document.querySelector('.betBTN').addEventListener('click', function() {
var toAdd = document.querySelector('div').textContent - 100;
document.querySelector('div').innerHTML = "";
document.querySelector('div').insertAdjacentHTML('afterbegin', toAdd);
});
});
Any suggestions?
Replace your 100 with
document.querySelector("input").value;
This line will get the value of input element
document.addEventListener('DOMContentLoaded',function() {
document.querySelector('.betBTN').addEventListener('click', function() {
var toAdd = document.querySelector('div').textContent - document.querySelector("input").value;
document.querySelector('div').innerHTML = "";
document.querySelector('div').insertAdjacentHTML('afterbegin', toAdd);
});
});
Balance: <div>1000</div>
<input type="text" value=0 name="betAmount">
<button class="betBTN">BET</button>
If you’re talking about the entered value, then the following would do the job:
document.querySelector('input[name="betAmount"]').value;
All input elements, whether they are HTML input or textarea or select etc have a value property which is the actual value of the user data.
This question already has answers here:
Dynamically creating a specific number of input form elements
(2 answers)
Closed 1 year ago.
I've a form field named Number of messages, and based on what number the user specifies, I want the exact number of text fields to be dynamically generated below to allow users to enter specified number of messages.
I have browsed through some examples where JQuery is used to generate dynamic form fields, but since I'm not acquainted with JQuery, those examples are a bit too complex for me to grasp. I do know the basics of JavaScript, and would really appreciate if I could find a solution to my query using JavaScript.
function addinputFields(){
var number = document.getElementById("member").value;
for (i=0;i<number;i++){
var input = document.createElement("input");
input.type = "text";
container.appendChild(input);
container.appendChild(document.createElement("br"));
}
}
and html code will be
Number of members:<input type="text" id="member" name="member" value=""><br />
<button id="btn" onclick="addinputFields()">Button</button>
<div id="container"/>
fiddle here
You can try something similar to this...
var wrapper_div = document.getElementById('input_set');
var btn = document.getElementById('btn');
btn.addEventListener('click', function() {
var n = document.getElementById("no_of_fields").value;
var fieldset = document.createElement('div'),
newInput;
for (var k = 0; k < n; k++) {
newInput = document.createElement('input');
newInput.value = '';
newInput.type = 'text';
newInput.placeholder = "Textfield no. " + k;
fieldset.appendChild(newInput);
fieldset.appendChild(document.createElement('br'));
}
wrapper_div.insertBefore(fieldset, this);
}, false);
No. of textfields :
<input id="no_of_fields" type="text" />
<div id="input_set">
<p>
<label for="my_input"></label>
</p>
<button id="btn" href="#">Add</button>
</div>
It is a simple task which is made simpler with jQuery. You need to first get the value from the input field for which you can use .val() or .value. Once you get the value, check if it is an integer. Now, simply use .append() function to dynamically add the elements.
HTML
<form id="myForm">
Number of Messages: <input id="msgs" type="text"> </input>
<div id="addmsg">
</div>
</form>
JAVASCRIPT
$("#msgs").on('change', function()
{
var num = this.value;
if(Math.floor(num) == num && $.isNumeric(num))
{
$("#addmsg").text('');
for(var i = 0; i < num; i++)
{
$("#addmsg").append("<input type='text'/><br/>");
}
}
});
Fiddle
Note, everytime the value in the input changes, I am first clearing the div by:
$("#addmsg").text('');
And then I loop and keep adding the input field. I hope this helps!
I am doing some basic javascript where i am choosing some value from the popup and that value is appearing in the textfield. Now there is a button on the side of the textfieldfield, which when clicked will transfer its value to the another textfield as comma separated.
I mean the new textfield will have values as comma separated and not replaced.
I am doing a code like this
<input type="text" class="inputs" style="width:70px;" name="color1" id="color1" value="" maxlength="7" size="7">
<img src="icon_add.gif" alt="Add to text Box above" title="Add to text Box above" border="0">
function addtoTextField(cFieldName) {
var objTxt = document.getElementById('sta');
objTxt.appendChild(cFieldName);
}
Another text field where i need to pass value
<input type="text" name="sta" id="sta" class="inputs" />
Textbox element can't have child nodes, it only got a value. So to append value of other textbox as comma delimeted string, have this:
function addtoTextField(cFieldName) {
var oField = document.getElementById(cFieldName);
var valueToAdd = oField.value;
if (valueToAdd.length === 0)
return; //don't add empty values
var objTxt = document.getElementById('sta');
var existingValues = (objTxt.value.length === 0) ? [] : objTxt.value.split(",");
existingValues.push(valueToAdd);
objTxt.value = existingValues.join(",");
oField.value = ""; //clear textbox
oField.focus(); //bring focus back
}
Live test case.
The above will also clear the sender textbox value and re-focus it for next input.