better-number-input v1.0.3

better-number-input

Use it in your html:

<script src="https://cdn.jsdelivr.net/gh/chill31/better-number-input/better-number-input.js"></script>

at the end of the body tag BUT before all scripts, so it selects all number inputs and implements strict number only behaviour. Read the documentation for better code examples and detail.

Brief

this file does simple things. First, it removes the annoying "up" and "down" arrows in the number inputs. This is done by just converting the type="number" attribute to type="text".

This is not a problem. For accessibility, the input will still be rendered as a "number" input for those using assistive technologies.

Options

There are a few options you can customize to change the behaviour of the "number" input. The default are as follows:

{
  allowNegative: true,
  allowDecimal: true,
  allowScientificNotation: false,
  valueAsNumber: 0,
  resetValues: true
}

These options are set through javascript through <input>.betterInputOptions. To customize these, you can do:

const myInput = document.querySelector('.my-number-input');

myInput.betterInputOptions = {
  allowNegative: false,
  allowDecimal: false,
  allowScientificNotation: true,
  valueAsNumber: 1, // won't actually change the input value.
  resetValues: false
}

Detailed Options

allowNegative

this option is a boolean type. (true, false) This allows you to set whether negatives will be allowed or not. (kind of obvious)

allowDecimal

this option is a boolean type (true, false) This allows you to set whether a decimal point (.) will be allowed to enter or not.

allowScientificNotation

this option is a boolean type (true, false) This allows you to set whether scientific notation will be allowed or not. For those of you who don't know, this is how scientific notation is used:

console.log(3e4); // valid Javascript syntax (scientific notation)

// OUTPUT: 30000

valueAsNumber

this value is supposed to be read-only. It is a type of number. As you read in the beginning, the number input is changed to "text" input for certain features and removing the "up down" arrows. In the number inputs, there was a parameter of valueAsNumber to give the value of the input as number type, but this won't be possible with text inputs. To get the value as number in the "better" number inputs, use

const myInput = document.querySelector('.my-number-input');
console.log(myInput.betterInputOptions.valueAsNumber);

resetValues

Input values are saved after refreshes for some time, so this option allows you to reset the value of the inputs each time the browser tab refreshes. This option is a boolean type (true, false)

Disabling Features.

For all the number inputs which you don't need this feature for, you can do the following:

<input type="number" disable-better-number-input>

the inputs with disable-better-number-input attribute are not selected in the input list, so they will not be enhanced as the other number inputs will be in your project.