Broaden the natural interface for the element

I'm looking to create a uniquely customized button in React using TypeScript. Essentially, I want to build upon the existing properties of the <button> tag. Below is a simplified version of what I have so far:

export default class Button extends React.Component<Props, State> {
  public render() {
    const { size, ...buttonProps } = this.props;
    return (
      <button
        {...buttonProps}
        className={classnames({
          [styles.small]: size === 'small',
          [styles.medium]: size === 'medium',
          [styles.large]: size === 'large',
        })}
      />
    );
  }
}

My challenge lies in finding a way to inherit all the native HTMLButton elements' proptypes within an interface. My initial attempt looks something like this:

interface Props extends <(Something)> {
  size: 'small' | 'medium' | 'large',
}

Have you ever had experience extending native HTML element properties in TypeScript before?

Answer №1

If you're working with React, the HTMLProps interface can be a valuable tool.

import { HTMLProps } from 'react'

interface Props extends HTMLProps<HTMLButtonElement> {
    size: 'tiny' | 'regular' | 'huge'
}

Answer №2

In TypeScript, interfaces can be merged and extended within the same common root, allowing for open and flexible declarations. See the example below:

interface HTMLButtonElement {
    customMethod(): string;
}

const button = document.getElementsByTagName('button')[0];

const customValue = button.customMethod();

To extend the HTMLButtonElement interface, it must be declared in the same global scope as the original interface. By adding a new method like customMethod, your HTMLButtonElement will inherit all properties from the original interface along with the extra functionality.

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