@uiw/react-color-alpha

React Color Alpha

Alpha is a subcomponent of @react-color.

Install

npm i @uiw/react-color-alpha

Usage

import React, { useState } from 'react';
import { hsvaToRgbaString } from '@uiw/color-convert';
import Alpha from '@uiw/react-color-alpha';

function Demo() {
  const [hsva, setHsva] = useState({ h: 0, s: 0, v: 68, a: 1 });
  return (
    <>
      <Alpha
        hsva={hsva}
        onChange={(newAlpha) => {
          setHsva({ ...hsva, ...newAlpha });
        }}
      />
      <div style={{ background: hsvaToRgbaString(hsva), marginTop: 30, padding: 10 }}>
        {JSON.stringify(hsva)}
      </div>
    </>
  );
}

export default Demo;

Props

import { HsvaColor } from '@uiw/color-convert';
import { Interaction } from '@uiw/react-drag-event-interactive';
declare const BACKGROUND_IMG = 'data:image/png;base64,....'
interface AlphaProps extends Omit<React.HTMLAttributes<HTMLDivElement>, 'onChange'> {
  prefixCls?: string;
  /** String, Pixel value for picker width. Default `316px` */
  width?: React.CSSProperties['width'];
  /** String, Pixel value for picker height. Default `16px` */
  height?: React.CSSProperties['height'];
  /** hsva => `{ h: 0, s: 75, v: 82, a: 1 }` */
  hsva: HsvaColor;
  /** React Component, Custom pointer component */
  pointer?: ({ prefixCls, left }: PointerProps) => JSX.Element;
  /** Set rounded corners. */
  radius?: React.CSSProperties['borderRadius'];
  /** Set the background color. */
  background?: string;
  /** Set the background element props. */
  bgProps?: React.HTMLAttributes<HTMLDivElement>;
  /** Set the interactive element props. */
  innerProps?: React.HTMLAttributes<HTMLDivElement>;
  /** String Enum, horizontal or vertical. Default `horizontal` */
  direction?: 'vertical' | 'horizontal';
  onChange?: (newAlpha: { a: number; }, offset: Interaction) => void;
}
interface PointerProps extends React.HTMLAttributes<HTMLDivElement> {
  prefixCls?: string;
  left?: string;
  top?: string;
}

License

Licensed under the MIT License.