html5 input type number with regex pattern in mobile

Question

I'm trying to get regex pattern in input type number to show only numbers and dots. I tried something like this.

<input type="number" pattern="[0-9.]*">

<input type="tel">

Both are showing only numbers (0-9), but not displaying . (dot). I need to use dot in input field.

Is it possible thru html5? Or Shall I go with javascript?

Note: This is working fine in Android, but . (dot) not displaying in iphones

I need to display mobile keypad like this..

Any help regarding this?

Answer 1

If you only specify "type=number" it will display keypad on iPhone like:

And if you specify pattern like <input type="number" pattern="\d*"/> or <input type="number" pattern="[0-9]*" />, then keypad on iPhone will be like :

Still it cannot display dot(.), currently there is no pattern to handle such case.

So you may opt for <input type="tel" /> which will provide keypad like:

Please refer to below links for more details on inputs for iOS:

http://bradfrost.com/blog/mobile/better-numerical-inputs-for-mobile-forms/

http://blog.pamelafox.org/2012/05/triggering-numeric-keyboards-with-html5.html

https://about.zoosk.com/nb/engineering-blog/mobile-web-design-use-html5-to-trigger-the-appropriate-keyboard-for-form-inputs/

http://mobiforge.com/design-development/html5-mobile-web-forms-and-input-types

http://www.petefreitag.com/item/768.cfm

http://html5tutorial.info/html5-contact.php

Hope this will help you. :)

Updates for customization (reference: https://stackoverflow.com/a/20021657/1771795)

You can do some customization using javascript. Lets take example of currency input with decimals pattern in which e.which to read CharCode entered and then push it into an array (before) which represents digits before decimal mark and another array (after) to move values from (before) array past the decimal mark.

complete fiddle link

HTML:

<input type="tel" id="number" />

JS

Variables and functions:

// declare variables
var i = 0,
    before = [],
    after = [],
    value = [],
    number = '';

// reset all values
function resetVal() {
    i = 0;
    before = [];
    after = [];
    value = [];
    number = '';
    $("#number").val("");
    $(".amount").html("");
}

// add thousand separater
function addComma(num) {
  return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}

Main code:

// listen to keyup event
$("#number").on("keyup", function (e, v) {

    // accept numbers only (0-9)
    if ((e.which >= 48) && (e.which <= 57)) {

        // convert CharCode into a number   
        number = String.fromCharCode(e.which);

        // hide value in input
        $(this).val("");

        // main array which holds all numbers
        value.push(number);

        // array of numbers before decimal mark
        before.push(value[i]);

        // move numbers past decimal mark
        if (i > 1) {
            after.push(value[i - 2]);
            before.splice(0, 1);
        }

        // final value
        var val_final = after.join("") + "." + before.join("");

        // show value separated by comma(s)
        $(this).val(addComma(val_final));

        // update counter
        i++;

        // for demo
        $(".amount").html(" " + $(this).val());

    } else {

        // reset values
        resetVal();
    }
});

Reset:

// clear arrays once clear btn is pressed
$(".ui-input-text .ui-input-clear").on("click", function () {
    resetVal();
});

Result:

Answer 2

Not every input type and attribute is supported in all browsers. In general, most modern browsers from IE10+ include basics such as email and number.

The browser will revert to a standard text input when a specific type and ignore attributes when those values are not supported.

So you should use a good regular expression pattern.

for example

<input type="tel" name="tel" pattern="^(?:\(\d{3}\)|\d{3})[- . ]?\d{3}[- . ]?\d{4}$" />

• 1234567899
• 123 456 7899
• 123-456-7899
• 123.456.7899

supported

Browser support for 'tel' type

• Android (yes)
• iOS (yes)
• IE (yes)
• Mobile (yes)
• Opera (yes)
• Mobile (yes)
• Opera (yes)
• Classic (yes)
• Opera Mini (no)
• Firefox (yes)
• Mobile (yes)
• Chrome for Android (yes)

(Sources: caniuse.com, DeviceAtlas, mobilehtml5.org)

Browser support for pattern attribute

But the pattern attribute is supported in Internet Explorer 10, Firefox, Opera, and Chrome. And is not supported in Internet Explorer 9 and earlier versions, or in Safari.

Answer 3

Unfortunately it's not possible to achieve the exact functionality that you're looking for is not possible. However there is a kind of "hack" available which will give similar functionality:

http://www.brownphp.com/2011/05/iphone-currency-input-web-apps/

It's a bit of JS which fills in the decimal automatically when the user starts typing, like this: 0.01 -> 0.12 -> 1.23 -> 12.34 . So this can be used for similar effect.

Answer 4

I had a similar scenario whereby I needed to support both comma and point as both the decimal mark and digit grouping [see here]

E.g.

1.00 / 1,00
1,000,000.00 / 1.000.000,00

At the same time the scenario required that the number keypad was displayed on mobile devices.

The initial implementation combined the 'number' type with the pattern attribute.

<input type="number" pattern="^(0*[,.]*[0-9][0-9]*([,.][0-9]+)*|[0-9]?[,.][0-9]*[1-9][0-9]*)$" required />

However the number validation failed inputs that the pattern would allow. This meant the field and thus form were marked as invalid.

The solution was to change the type to 'tel'.

<input type="tel" pattern="^(0*[,.]*[0-9][0-9]*([,.][0-9]+)*|[0-9]?[,.][0-9]*[1-9][0-9]*)$" required />

Mobile users would now see a number keypad by default, and the pattern validation would be used to validate the input.