Typed Input

Demo and API docs

An ultra simple element that extends the native input element and makes it typed.

Installation

npm i typed-input
# or
yarn add typed-input

Without npm/yarn

If you don't use npm or yarn, an IIFE (Immediately Invoked Function Expression) version of the element is also provided. The IIFE version of the element can also be used if you're still on Bower (e.g. if you're using Polymer < 3). To use it, just use the unpkg CDN:

<script src="https://unpkg.com/typed-input/typed-input.iife.min.js"></script>

Usage

Basic

After importing the ESM or the IIFE version of the element, just add is="tryped-input" to your input tag. From now on, your input.value will automagically be converted to the right type (numbers for input[type="number"], dates for input[type="date"], etc.). Remember that to get the typed value you will need to read the value property, not the value attribute. e.g. input.value will work, input.getAttribute('value') won't.

If for some reason you need to access the original, stringified value, you can use the backup property input.rawValue.

Practical example:

<script type="module" src="path/to/typed-input.js"></script>
<input is="typed-input" type="number" id="input">
<script>
  console.log(typeof input.value === 'number');
  // true
  console.log(typeof input.rawValue === 'string');
  // true
</script>

Extending the element

If you're building your own input element and you want it to be typed, you can extend HTMLTypedInputElement instead of HTMLInputElement.

Practical example:

import { HTMLTypedInputElement } from 'typed-input';

class MyCustomTypedInput extends HTMLTypedInputElement {
  // ...
}

customElements.define('my-custom-typed-input', MyCustomTypedInput, { extends: 'input' });

Using the mixin

If you are extending an element that already extends the native input, or you need to add types to an input-like element (i.e. an element that has type, value and checked properties), a typed mixin is also provided.

Practical example:

import { typed } from 'typed-input';

class MyCustomTypedInput extends typed(MyInputLikeElement) {
  // ...
}

customElements.define('my-custom-typed-input', MyCustomTypedInput, { extends: 'input' });