How I can create a input with JS ?

Question

How I can create a input with JS .Example I create a input,after a client type a input in it and he click on a submit and at the end Client's input turns to other input that I want.Example in phuysical quantities such as Celcius in Kelvin.

Answer 1

use prompt()
Ex: user=prompt (" enter somting" )

Answer 2

<input type="text" oninput="txt=this.value">
<input type="button" value="Submit" onclick="changeInput()">
<script type="text/javascript">
var txt;
function changeInput(){
alert("User input: "+txt+"\nChange this text however you want...");
}
</script>

Answer 3

please answer me,if you've any question or problem please ask from me.

Answer 4

Yes I know it , but how I can do it this work with create a input tag with HTML and change it with a submit as I want

Answer 5

Because my internet speed is sh*t here, I am not sure if I sent already an answer. But if I didnt, try something like this:

HTML:
<input type='number' id='firstInput' />
<p id="output"></p>
<button onclick='myFunction()'>click</button>

JS:
function myFunction() {
var input = parseInt(document.getElementById("firstInput").value);
var output = document.getElementById("output");

//calculations, here you can insert your own formula
output.innerHTML = (input + 5);
}

Answer 6

@ali
parseInt(...) means "transfer a number instead of a string" so if you type 4 it will be an integer, not a string (so parseInt(...)+4 = ...+4, but without parseInt() it would be "..." + 4.
So if (...) is 5, in the first case it would be 5+4=9, in the second it would be '5'+4=54).

For the second one, to be honest, I am not sure.

Answer 7

Thank you "Ice" your massage was sent to me.I've 2 question :
What is the "parseInt(...)" ?
How I can enter that answer in that input (I dont wanna use from p tag and ...,just I wanna enter the answer in that input.)

Answer 8

Thanks