This question already has answers here:
How can I change div content with JavaScript?
(6 answers)
Closed 5 years ago.
I have a simple code that add two numbers. The result is displayed in a textbox. How can I display the result in a div, rather than a textbox?
Here is my current code, which displays the result in a textbox.
function sum() {
var field1 = document.getElementById('txt1').value;
var field2 = document.getElementById('txt2').value;
var field1V = parseInt(field1);
var field2V = parseInt(field2);
var result = field1V + field2V;
if (!isNaN(result)) {
document.getElementById('txt3').value = result;
}
}
<input type="text" placeholder="Type number" id="txt1" onkeyup="sum();" />
<input type="text" placeholder="Type number" id="txt2" onkeyup="sum();" />
Result: <input type="text" id="txt3" readonly />
function sum() {
var field1 = document.getElementById('txt1').value;
var field2 = document.getElementById('txt2').value;
var field1V = parseInt(field1);
var field2V = parseInt(field2);
var result = field1V + field2V;
if (!isNaN(result)) {
document.getElementById('txt3').value = result;
document.getElementById('result').innerHTML = result;
}
}
<input type="text" placeholder="Type number" id="txt1" onkeyup="sum();" />
<input type="text" placeholder="Type number" id="txt2" onkeyup="sum();" />
Result: <input type="text" id="txt3" readonly />
Result: <div id='result'></div>
Related
Let say I have 2 input box to enter integer value and 1 input value for display the result of sum of 2 input box earlier.
How to make make not assigned input value default 0 integer..
Below are my code so far
<input type="text" id="txt1" onkeyup="sum();" />
<input type="text" id="txt2" onkeyup="sum();" />
<input type="text" id="txt3" />
function sum() {
var txtFirstNumberValue = document.getElementById('txt1').value;
var txtSecondNumberValue = document.getElementById('txt2').value;
var result = parseInt(txtFirstNumberValue) + parseInt(txtSecondNumberValue);
if (!isNaN(result)) {
document.getElementById('txt3').value = result;
}
}
Below are my demo.. Let say input 1 is value=1 and input 2=null, I wanna make Input 3 to be 1
http://jsfiddle.net/tLKLy/
doing
document.getElementById('txt3').value = 0
should work.
if not, this will work too
$("input:txt3").val("0");
You can add default value attribute to the input tags and it should work.
function sum() {
var txtFirstNumberValue = document.getElementById('txt1').value;
var txtSecondNumberValue = document.getElementById('txt2').value;
var result = parseInt(txtFirstNumberValue) + parseInt(txtSecondNumberValue);
if (!isNaN(result)) {
document.getElementById('txt3').value = result;
}
}
<input type="text" value="0" id="txt1" onkeyup="sum();" />
<input type="text" value="0" id="txt2" onkeyup="sum();" />
<input type="text" id="txt3" />
Also you could do something like this, if you don't want to see the initial zeros. Basically parse the input fields and check if the sum is a Number.
function sum() {
let num1 = +(document.getElementById('txt1').value);
let num2 = +(document.getElementById('txt2').value);
let sum = num1 + num2;
if (!isNaN(sum)) {
document.getElementById('txt3').value = sum;
}
}
<input type="text" id="txt1" onkeyup="sum();" />
<input type="text" id="txt2" onkeyup="sum();" />
<input type="text" id="txt3" />
function sum() {
var txtFirstNumberValue = document.getElementById('txt1').value;
var txtSecondNumberValue = document.getElementById('txt2').value;
var result = parseInt(txtFirstNumberValue) + parseInt(txtSecondNumberValue);
if (!isNaN(result)) {
document.getElementById('txt3').value = result;
}
}
<input type="text" id="txt1" value="0" onkeyup="sum();" />
<input type="text" id="txt2" value="0" onkeyup="sum();" />
<input type="text" id="txt3" value="0"/>
https://jsfiddle.net/VIKAS_123/yotg8d64/
This question already has answers here:
Adding two numbers concatenates them instead of calculating the sum
(24 answers)
Closed 3 years ago.
How to multiply two input and addition the third input on keypress
I have a Three input field need to multiple first two input and addition of third input then show the result field
HTML code:
<input type="text" tabindex="3" class="form-control" name="making_charge" oninput="calculate()" placeholder="Making Charge" id="box3" required />
<input type="text" tabindex="3" class="form-control" name="total_price" placeholder="Total Price" id="result" readonly />
function calculate() {
var myBox1 = document.getElementById('box1').value;
var myBox2 = document.getElementById('box2').value;
var myBox3 = document.getElementById('box3').value;
var result = document.getElementById('result');
var myResult = myBox1 * myBox2 + myBox3;
result.value = myResult;
}
Well value is a string so you need to covert it to a number to do mathematical operations on it.
You can do it with a +, Number(), parseInt(), parseFloat()
function calculate() {
var myBox1 = +document.getElementById('box1').value;
var myBox2 = +document.getElementById('box2').value;
var myBox3 = +document.getElementById('box3').value;
var result = document.getElementById('result');
var myResult = myBox1 * myBox2 + myBox3;
result.value = myResult;
}
<input type="text" tabindex="3" class="form-control" name="making_charge" oninput="calculate()" placeholder="Making Charge" id="box1" required />
<input type="text" tabindex="3" class="form-control" name="making_charge" oninput="calculate()" placeholder="Making Charge" id="box2" required />
<input type="text" tabindex="3" class="form-control" name="making_charge" oninput="calculate()" placeholder="Making Charge" id="box3" required />
<input name="total_price" placeholder="Total Price" id="result" readonly />
I created a form with three fields first_name, Last_name, city and in the fourth field, I am having an Id column which is read-only. When the user fills the first three fields in the form, before submitting it should generate an id in the fourth column but here it should use the first two alphabets that are in the fields to generate an Id
For eg. First_name = Roid, Last_name = Steve, city = California then in the fourth field it should automatically generate this id = rostca (all the first two alphabets)
How to achieve this?
Here is a JavaScript version to answer to your issue.
(function () {
populate();
})();
function populate () {
var str = "";
Array.from(document.getElementsByClassName("inputs")).forEach(function (element) {
str += element.value.substr(0, 2).toLowerCase();
});
document.getElementById("output").value = str;
}
<div>
<input type="text" class="inputs" value="Roid" oninput="populate();" />
<input type="text" class="inputs" value="Steve" oninput="populate();" />
<input type="text" class="inputs" value="California" oninput="populate();" />
<input id="output" type="text" readonly disabled />
</div>
Here is a jQuery answer to your issue.
$(function () {
populate();
$(".inputs").on("input", function() {
populate();
});
});
function populate () {
var str = "";
$(".inputs").each(function () {
str += $(this).val().substr(0, 2).toLowerCase();
});
$("#output").val(str);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>
<input type="text" class="inputs" value="Roid" />
<input type="text" class="inputs" value="Steve" />
<input type="text" class="inputs" value="California" />
<input id="output" type="text" readonly disabled />
</div>
Check below code,
function TextChanged(){
var first_name = document.getElementById("first_name").value;
var Last_name = document.getElementById("Last_name").value;
var city = document.getElementById("city").value;
document.getElementById("id").value = first_name.substring(0, 2) +Last_name.substring(0, 2) +city.substring(0, 2);
}
<input type="text" id="first_name" onblur="TextChanged()">
<input type="text" id="Last_name" onblur="TextChanged()">
<input type="text" id="city" onblur="TextChanged()">
<input type="text" id="id" readonly>
Check here jsbin demo, https://jsbin.com/qegazab/edit?html,js,console,output
I try to pass the textbox value from a page to another page.
I try to pass that text box but failed I use javascript for doing that.
I have to try to change my code properly but still not work
the error is the data that passing to the text box is multiple.
this is my code
1st-page code
function myFunction() {
var inputTest = document.getElementById('tanggal2').value;
var inputTest1 = document.getElementById('dt').value;
localStorage.setItem( 'objectToPass', inputTest );
localStorage.setItem( 'objectToPass1', inputTest1 );
if (inputTest=="") {
window.open('report_pengambilan_singgle.html','','height=650,width=1200');
}
else {
window.open('report_pengambilan_singgle1.html','','height=650,width=1200');
}
}
<input type="text" id="dt" type="text" name="dt" maxlength="1" size="23" readonly="readonly" style="visibility:hidden" />
<input type="text" id="tanggal2" type="text" name="tanggal2" maxlength="1" size="23" readonly="readonly" style="visibility:hidden" />
<label onclick="myFunction();" >a</label>
and this my 2nd-page code
var inputTest = localStorage.getItem('objectToPass');
var inputTest1 = localStorage.getItem('objectToPass1');
var displayData = inputTest;
var displayData = inputTest1;
document.getElementById("datepicker1").value=inputTest;
document.getElementById("datepicker2").value=inputTest;
document.getElementById("datepicker3").value=inputTest;
localStorage.removeItem( 'objectToPass1' ); // Clear the localStorage
localStorage.removeItem( 'objectToPass' ); // Clear the localStorage
Try this way...
test.html
<script>function myFunction() {
var inputTest = document.getElementById('tanggal2').value;
var inputTest1 = document.getElementById('dt').value;
if (inputTest=="") {
window.open('report_pengambilan_singgle.html','','height=650,width=1200');
}
else {
window.open('test1.html?name=' + inputTest1,'','height=650,width=1200');
}
}
</script>
<input type="text" id="dt" type="text" name="dt" size="23" />
<input type="text" id="tanggal2" type="text" name="tanggal2" size="23" />
<button onclick="myFunction();" >a</button>
test1.html
<script>window.onload = function () {
var url = document.location.href,
params = url.split('?')[1].split('&'),
data = {}, tmp;
for (var i = 0, l = params.length; i < l; i++) {
tmp = params[i].split('=');
data[tmp[0]] = tmp[1];
}
document.getElementById("datepicker1").value = data.name;
}
</script>
<input type="text" id="datepicker1" type="text" name="datepicker1" size="23" />
i Hope working for u...
you have textbox which have hidden and not any value define
so first set any value in textbox and create textbox in another page before your <script> start
like
<input type="text" id="datepicker1" value="">
<input type="text" id="datepicker2" value="">
<input type="text" id="datepicker3" value="">
function multiplyBy()
{
num1 = document.getElementById("firstNumber").value;
num2 = document.getElementById("secondNumber").value;
num3= document.getElementById("result").value = num1 * num2;
document.getElementById("total").value = +num3 ;
}
1st Number : <input type="text" id="firstNumber" value="" /><br>
2nd Number: <input type="text" id="secondNumber" value="" onchange="multiplyBy()" /><br>
<p>The Result is : <br>
<input type="text" name="result" id = "result" value=""/>
</p>
<p>Total :<br>
<input type="text" name="total" id="total" value=""/>
</p>
function multiplyBy()
{
num1 = document.getElementById("firstNumber").value;
num2 = document.getElementById("secondNumber").value;
num3= document.getElementById("result").value = num1 * num2;
}
1st Number : <input type="text" id="firstNumber" value="" /><br>
2nd Number: <input type="text" id="secondNumber" value=""
onchange="multiplyBy()" /><br>
<p>The Result is : <br>
<input type="text" name="result" id = "result" value=""/>
</p>
I am multiplying two numbers here.how to add those multiplied numbers in another text box.suppose 2&5 are multiplied later 4&6 multiplied how to add those numbers.
Try this. You need to parse the input value using parseFloat. This will convert the string to a number. The existing result value is added to the newly calculating value. |0 is used for the false value of input getting 0
Updated
prev, present and total result box were added
Append each additional input with new result.
var last=0;
function multiplyBy() {
var num1 = document.getElementById("firstNumber");
var num2 = document.getElementById("secondNumber");
var prev = document.getElementById("prev");
var present = document.getElementById("present");
var total = document.getElementById("result");
prev.value=last;
present.value=(parseFloat(num1.value) * parseFloat(num2.value))
last = last+(parseFloat(num1.value) * parseFloat(num2.value))
total.value=last;
num1.value = "";
num2.value = "";
}
1st Number : <input type="text" id="firstNumber" value="" /><br> 2nd Number: <input type="text" id="secondNumber" value="" onchange="multiplyBy()" /><br>
<p >
Prev result:<br>
<input type="text" name="result" id="prev" ><br>
Present:<br>
<input type="text" name="result" id="present" ><br>
The total Result is : <br>
<input type="text" name="result" id="result"><br>
</p>
You just need for get value of text box and add it with result
function multiplyBy()
{ var sum = 0;
var num=0;
num1 = document.getElementById("firstNumber").value;
num2 = document.getElementById("secondNumber").value;
num =parseInt(num1 * num2);
num3=parseInt(document.getElementById("result").value);
document.getElementById("result").value=(num + num3);
}
</script>
1st Number : <input type="text" id="firstNumber" value="" /><br>
2nd Number: <input type="text" id="secondNumber" value=""
onchange="multiplyBy()" /><br>
<p>The Result is : <br>
<input type="text" name="result" id = "result" value="0"/>
</p>
I have added the multiplyBy() to both the input fields and changed the type to number to restrict the user to enter number only.
Please check the code snippet below.
document.getElementById("firstNumber").addEventListener("change",multiplyBy);
document.getElementById("secondNumber").addEventListener("change",multiplyBy);
function multiplyBy()
{
actualResult = document.getElementById("actualResult").value ? document.getElementById("actualResult").value : 0; // Return zero if there is no value in actualResult input field
num1 = document.getElementById("firstNumber").value;
num2 = document.getElementById("secondNumber").value;
num3= document.getElementById("result").value = num1 * num2;
document.getElementById("actualResult").value = Number(actualResult) + num3;
}
1st Number : <input type="number" id="firstNumber" value=""/><br>
2nd Number: <input type="number" id="secondNumber" value=""/><br>
<p>The Current Result is : <br>
<input type="number" name="result" id = "result" value=""/>
</p>
<p>Previous Result + Current Result : <br>
<input type="number" name="actualResult" id = "actualResult" value=""/>
</p>
You need to add event handlers if you want to calculate on change of textbox input like following.
function multiplyBy()
{
var result = document.getElementById("result");
var num1 = document.getElementById("firstNumber").value;
var num2 = document.getElementById("secondNumber").value;
var num3= parseFloat(num1) * parseFloat(num2);// to convert entered values to float and || 0 to use 0 if no value is there
if(!isNaN(num3)){
document.getElementById("resultPrev").value = document.getElementById("result").value;
document.getElementById("resultCurrent").value = num3;
result.value = parseFloat(result.value || 0) + num3;
}
}
document.getElementById("firstNumber").addEventListener("change",multiplyBy);
document.getElementById("secondNumber").addEventListener("change",multiplyBy);
1st Number : <input type="text" id="firstNumber" value="" /><br>
2nd Number: <input type="text" id="secondNumber" /><br>
<p>The Previous Result is : <br>
<input type="text" name="resultPrev" id = "resultPrev" value="0"/>
</p>
<p>The Current Result is : <br>
<input type="text" name="resultCurrent" id = "resultCurrent" value=""/>
</p>
<p>The Final Result is : <br>
<input type="text" name="result" id = "result" value=""/>
</p>
Consider handling non number values.