Fill Second Input automatically when filling the First

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Fill Second Input automatically when filling the First

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#1 by (4 votes)
#2 by (3 votes)

2

I have a input that I'll give the name of input-1 , and there I'll insert this: 12:00

When I have a second input that I am going to give the name of input-2 , it is possible to insert in input-1 : 12:00

It does not input-2 can automatically fill the time I put in input-1 but with another two hours.

Example :

I put 10:00 on input-1 and no input-2 on 12:00 .

Is it possible to do this?

php mysql javascript html

asked by anonymous 23.04.2015 / 01:10

2 answers

4

You could create a function to get the value of the first input and set a second variable to add, in your case, the value of 2 . So it will get the value, and it will add up to the number defined in the variable.

function calc()
{
  var a = "2";
  var b = valor.value;

  total.value = parseFloat(a) + parseFloat(b) + ':00';
}

Valor: <input type="time" id="valor" onkeypress="calc()"><br/><br/>
Total: <input type="time" id="total">

In this case, I put :00 just to follow your example, but it's irrelevant if you do not have to use it.

23.04.2015 / 01:56

Passing javascript object by parameter in ajax callback Display inline does not work

score 3 · Accepted Answer

Yes,

You should add an event listener in input-1 of types

KeyDown (when the key is pressed but does not release) or,
KeyUp (when the key is released) or,
KeyPress (when key is pressed)
or Blur (when exiting the input)

And make this trigger a function that treats data from input-1 and insert them into input-2 .

Taking the following code as an example:

Javascript with JQuery to make it easier to view the binding of the event:

$(document).ready( function(){
    $('#input-1').keyup(function (e) {
        var patt = /([0-9]{1,2}:[0-9]{2})/;
        // Testando se o valor digitado já é algo como nn:nn
        if (patt.test(e.target.value)) {
            var strsplit = e.target.value.split(':');
            var hora = Number(strsplit[0]) + 2;
            var min = (strsplit[1]);
            var stringfinal = '';
            // ex. se hora = 24 então vira 00, se hora = 25 então vira 01;
            if (hora > 23) {
                hora = hora - 24;
            }
            if (hora < 10) {
                stringfinal += '0' + hora;
            } else {
                stringfinal += hora;
            }
            stringfinal += ':' + min;
            $('#input-2').val(stringfinal);
        } else {
            // Faz nada...   
        }
    });
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script><inputid="input-1" type="text">
<input id="input-2" type="text">

This should give the planned effect, the function I did was pretty basic and can be greatly improved, it's more a proof of concept.

Events can be checked even without jQuery. More information can be found at MDN Input and

I hope this answers your question.