@uiw/react-color-alpha

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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';

export default function Demo() {
  const [hsva, setHsva] = useState({ h: 0, s: 0, v: 68, a: 1 });
  return (
    <>
      <div style={{ display: "flex", gap: 10, flexDirection: "column", paddingBottom: 20 }}>
        <Alpha
          hsva={hsva}
          onChange={(newAlpha) => {
            setHsva({ ...hsva, ...newAlpha });
          }}
        />
        <Alpha
          hsva={hsva}
          reverse
          onChange={(newAlpha) => {
            setHsva({ ...hsva, ...newAlpha });
          }}
        />
      </div>
      <div style={{ display: "flex", gap: 10, flexDirection: "row" }}>
        <Alpha
          hsva={hsva}
          direction="vertical"
          width={16}
          height={120}
          onChange={(newAlpha) => {
            setHsva({ ...hsva, ...newAlpha });
          }}
        />
        <Alpha
          hsva={hsva}
          direction="vertical"
          reverse={true}
          width={16}
          height={120}
          onChange={(newAlpha) => {
            setHsva({ ...hsva, ...newAlpha });
          }}
        />
      </div>
      <div style={{ background: hsvaToRgbaString(hsva), marginTop: 30, padding: 10 }}>
        {JSON.stringify(hsva)}
      </div>
    </>
  );
}

Props

import React from 'react';
import { HsvaColor } from '@uiw/color-convert';
import { Interaction } from '@uiw/react-drag-event-interactive';
import type * as CSS from 'csstype';
import { PointerProps } from './Pointer';
export * from './Pointer';
export interface AlphaProps extends Omit<React.HTMLAttributes<HTMLDivElement>, 'onChange'> {
  prefixCls?: string;
  /** String, Pixel value for picker width. Default `316px` */
  width?: CSS.Properties<string | number>['width'];
  /** String, Pixel value for picker height. Default `16px` */
  height?: CSS.Properties<string | number>['height'];
  /** hsva => `{ h: 0, s: 75, v: 82, a: 1 }` */
  hsva: HsvaColor;
  /** React Component, Custom pointer component */
  pointer?: (props: PointerProps) => JSX.Element;
  /** Set rounded corners. */
  radius?: CSS.Properties<string | number>['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>;
  pointerProps?: PointerProps;
  /** String Enum, horizontal or vertical. Default `horizontal` */
  direction?: 'vertical' | 'horizontal';
  /** Flip alpha progression along the current axis. */
  reverse?: boolean;
  onChange?: (newAlpha: {
      a: number;
  }, offset: Interaction) => void;
}
export declare const BACKGROUND_IMG = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAMUlEQVQ4T2NkYGAQYcAP3uCTZhw1gGGYhAGBZIA/nYDCgBDAm9BGDWAAJyRCgLaBCAAgXwixzAS0pgAAAABJRU5ErkJggg==";
declare const Alpha: React.ForwardRefExoticComponent<AlphaProps & React.RefAttributes<HTMLDivElement>>;
export default Alpha;
interface PointerProps extends React.HTMLAttributes<HTMLDivElement> {
  prefixCls?: string;
  left?: string;
  top?: string;
}

Contributors

As always, thanks to our amazing contributors!

Made with contributors.

License

Licensed under the MIT License.