I want to set the value input by the user to var numberr, Not the value that is already there eg(value="9").
I might be completely doing the wrong thing I just want to know how to store a value Inputted by the user :/
var numberr = document.getElementById("myNumber").value;
function myFunctionVar() {
document.getElementById("myNumber").value = numberr;
}
<form action="/action_page.php">
<input type="number" id="myNumber" value="9">
<input type="submit">
</form>
You can try parseInt
document.getElementById("btnmyNumber").addEventListener("click", myFunctionVar);
function myFunctionVar() {
var numberr = parseInt(document.getElementById("myNumber").value, 10);
alert(numberr);
<form >
<input type="number" id="myNumber" value="9">
<input type="submit" id="btnmyNumber">
</form>
Try it:
let myNumber;
let input = document.querySelector('#myNumber')
input.addEventListener('input', function(e){
myNumber = e.target.value
console.log(myNumber)
})
Vote up if it helped)
Related
I am trying to obtain the value of a html input element which changes value when buttons are pressed or a value has been typed. Initially it is given a default value of 1.
<input type="text" name="list_quantity" value="1" id="count1">
Below is what I have included in the http GET request in an attempt to get the value
<input type="hidden" name="bought" value=document.getElementById("count1").value; />
In the resulting url this is the relevant parameter
'&bought=document.getElementById%28"count1"%29.value%3B'
Is this?
let c1 = document.querySelector("#count1");
let c2 = document.querySelector("#count2");
c1.onchange = function(){
c2.type = "text";
c2.value = c1.value;
}
<input type="text" name="list_quantity" value="1" id="count1">
<input type="hidden" name="bought" id="count2"/>
Or, with onkeyup
let c1 = document.querySelector("#count1");
let c2 = document.querySelector("#count2");
c1.onkeyup = function(){
c2.type = "text";
c2.value = c1.value;
}
<input type="text" name="list_quantity" value="1" id="count1">
<input type="hidden" name="bought" id="count2"/>
You can do it in this way:
function change(){
document.getElementById('bought').value = document.getElementById('count1').value;
}
<input type="hidden" name="bought" id="bought" />
<input onchange="change()" type="text" name="list_quantity" value="1" id="count1">
I have 2 radio buttons. All of them have different values. I also have one text field, in case I need a different value, I can enter that value on that text field.
<form action="" onsubmit="return doSubmit(this)">
<input type="radio" name="url" value="https://example.com/fee/25"> $25
<input type="radio" name="url" value="https://example.com/fee/50"> $50
<input type="submit" value="Submit">
</form>
and here is the Javascript I've found to make radio buttons working
<script type="text/javascript">
function doSubmit(form) {
var urls = form['url'];
var i = urls && urls.length;
while (i--) {
if (urls[i].checked) {
window.location = urls[i].value;
}
}
document.getElementById("amount").value;
return false;
}
</script>
I have one text field:
<input type="text" name="amount" size="10" id="amount" value="">
Ok. If the amount is entered, then I need to use this code:
document.getElementById("amount").value
But how to make it working with radio buttons? I have created this JS code:
<script type="text/javascript">
var link = "https://example.com/fee/";
var input= document.getElementById('amount');
input.onchange=input.onkeyup= function() {
link.search= encodeURIComponent(input.value);
};
</script>
What I'm doing wrong? Thanks in advance for your time. I love and enjoy learning from experts.
I would create a separate radio button for the text input:
var options = Array.from(document.querySelectorAll("[name=url]"));
amount.addEventListener('focus', function() {
options[0].checked = true; // If textbox gets focus, check that radio button
});
options[0].addEventListener('change', function() {
amount.focus(); // if first radio button gets checked, focus on textbox.
});
function doSubmit(form) {
// get checked value, replace empty value with input text
var value = options.find( option => option.checked ).value || amount.value;
window.location = "https://example.com/fee/" + value;
return false;
};
<form action="" onsubmit="return doSubmit(this)">
<input type="radio" name="url" value="" checked>
$<input type="text" name="amount" size="5" id="amount" value="" >
<input type="radio" name="url" value="25"> $25
<input type="radio" name="url" value="50"> $50
<input type="submit" value="Submit">
</form>
Instead of using the url as the value for the radio buttons, consider using the value you wish to pass to the url:
function doSubmit(form) {
var endpoint = "https://example.com/fee/";
// gets the values of input elements that were selected
var checkedValues = Array.from(form.amounts)
.filter(radio => radio.checked)
.map(radio => radio.value);
// if a radio button was checked, use its value
// otherwise, use the value in the text field
var amount = checkedValues.length ?
checkedValues[0] : form.amount.value;
console.log('redirecting to: ', endpoint + amount);
return false;
}
// uncheck radio buttons when text is entered
function uncheck() {
Array.from(document.querySelectorAll('input[name="amounts"]'))
.forEach(radio => radio.checked = false);
}
<form action="" onsubmit="return doSubmit(this)">
<input type="radio" name="amounts" value="25"> $25
<input type="radio" name="amounts" value="50"> $50
<input type="text" name="amount" onkeyup="uncheck()">
<input type="submit" value="Submit">
</form>
Edit: Wow I completely forgot you could use the :checked attribute as a css selector. In this case, the code becomes quite simple:
function doSubmit(form) {
// select checked inputs with the specified name attribute
var checkedRadio = document.querySelector('input[name="amounts"]:checked')
// if we have a radio button that is checked, use its value
// otherwise, use the text input's value
var amount = checkedRadio ? checkedRadio.value : form.amount.value;
window.location = 'https://example.com/fee/' + amount;
return false;
}
// uncheck radio buttons when text is entered
function uncheck() {
Array.from(document.querySelectorAll('input[name="amounts"]'))
.forEach(radio => radio.checked = false);
}
<form action="" onsubmit="return doSubmit(this)">
<input type="radio" name="amounts" value="25"> $25
<input type="radio" name="amounts" value="50"> $50
<input type="text" name="amount" onkeyup="uncheck()">
<input type="submit" value="Submit">
</form>
I want to pass the value 9112232453 of one textfield to another.
I know I need Javascript for this but I don't know how to do it.
HTML
<form method = "post" action="">
<input type="checkbox" name="phone" value="9112232453" onclick='some_func();' >
<input type="text" name="phone" value="" id="phone">
<input type="submit" name="Go">
</form>
Then later, I want to use the value in my php.
You could use a JS. function to take param (this.value) like:
<script>
var some_func = function (val){
var input = document.getElementById("phone");
input.value = val;
}
</script>
<form method = "post" action="">
<input type="checkbox" name="phone" value="9112232453" onclick='some_func(this.value);' >
<input type="text" name="phone" value="" id="phone">
<input type="submit" name="Go">
</form>
The best way is to not obtrude the HTML code with Javascript event handlers.
So, you can add a DOMContentLoaded event listener to the document, and as soon as DOM is loaded:
You add a change event listener to the input[type=checkbox], and then:
1.1. If the checkbox is checked, then you change the input#phone's value to its value
1.2. If not, then you empty the input#phone's value.
document.addEventListener('DOMContentLoaded', function() {
document.getElementById('cbphone').addEventListener('change', function(e) {
var phone = document.getElementById('phone');
if (this.checked) {
phone.value = this.value;
// you can even enable/disable the input#phone field, if you want to, e.g:
// phone.disabled = false;
}
else {
phone.value = '';
// phone.disabled = true;
}
});
});
<form method="post" action="">
<input type="checkbox" name="cbphone" id="cbphone" value="9112232453">
<input type="text" name="phone" id="phone">
<input type="submit" name="Go" value="Go">
</form>
before submit form use validation and check whether the field value is filled up or not. if yes get value of the field.
if(document.getElementBy("fieldIdfirst").value!="")
{
document.getElementBy("fieldIdSecond").value=document.getElementElementById("fieldIdfirst");
}
Thanks it..
Try this: http://jsfiddle.net/yhuxy4e1/
HTML:
<form method = "post" action="">
<input type="checkbox" name="phone" value="9112232453" onclick='some_func();' id="chk_phone">
<input type="text" name="phone" value="" id="txt_phone">
<input type="submit" name="Go">
</form>
JavaScript:
some_func = function() {
var checkBox = document.getElementById('chk_phone');
var textBox = document.getElementById('txt_phone');
textBox.value = checkBox.value;
}
Hi i want to calculate two input field values and result will show in third input field so i want to write code in ajax page
<input id="a1" type="text" />
<input id="a2" type="text" onblur="Calculate();" />
<input id="a3" type="text" name="total_amt" value="" />
here javascript function
<script>
function Calculate()
{
var resources = document.getElementById('a1').value;
var minutes = document.getElementById('a2').value;
document.getElementById('a3').value=parseInt(resources) * parseInt(minutes);
document.form1.submit();
}
</script>
starting its working but nw its not working please help me
Thanks in Advance
Look this! Work it.
http://jsfiddle.net/op1u4ht7/2/
<input id="a1" type="text" />
<input id="a2" type="text" onblur="calculate()" />
<input id="a3" type="text" name="total_amt" />
calculate = function()
{
var resources = document.getElementById('a1').value;
var minutes = document.getElementById('a2').value;
document.getElementById('a3').value = parseInt(resources)*parseInt(minutes);
}
Try AutoCalculator https://github.com/JavscriptLab/autocalculate Calculate Inputs value and Output By using selector expressions
Just add an attribute for your output input like data-ac="(#firstinput+#secondinput)"
No Need of any initialization just add data-ac attribute only. It will find out dynamically added elements automatically
FOr add 'Rs' with Output just add inside curly bracket data-ac="{Rs}(#firstinput+#secondinput)"
My code is from an answer above. Special thank for you!
calculate = function (a, p, t) {
var amount = document.getElementById(a).value;
var price = document.getElementById(p).value;
document.getElementById(t).value = parseInt(amount)*parseInt(price);}
<input type="number" id="a0" onblur="calculate('a0', 'p0', 't0')">
<input type="number" id="p0" onblur="calculate('a0', 'p0', 't0')">
<input type="number" id="t0" >
<hr>
<input type="number" id="a1" onblur="calculate('a1', 'p1', 't1')">
<input type="number" id="p1" onblur="calculate('a1', 'p1', 't1')">
<input type="number" id="t1" >
put in you form id="form1"
the JavaScript is look like this.
calculate = function()
{
var resources = document.getElementById('a1').value;
var minutes = document.getElementById('a2').value;
document.getElementById('a3').value = parseInt(resources)*parseInt(minutes);
document.form1.submit();
}
I have a form
<form>
<input id="input" type="number">
<input type="submit">
</form>
I want to be able to input a number into the number and click the submit button and javascript displays a number based on the number submitted.
(My Guess is that this question is very basic but I am pretty knew to javascript.)
Here is a very simple (jquery-less) example of what you might be after:
<script type="text/javascript">
function ShowANumber() {
var currentNumber = document.getElementById("input").value;
var newNumber = currentNumber * 10 // Do something with input
document.getElementById("result").innerHTML = newNumber;
return false; // Stop form submit
}
</script>
<form onsubmit="return ShowANumber();">
<input id="input" type="text"/>
<input type="submit"/>
</form>
<div>Result: <span id="result"></span></div>