javascript styled-componentsとhue-rotateで1枚の画像を怠惰にカラフルにするref：https：//qiita.com/terrierscript/items/02

Posted 2021-05-03

const getAngle = (idx, max) => {
  console.log(idx);
  return (360 * idx) / max;
};
const MockAvaterManual = styled.img`
  filter: hue-rotate(${({ idx, max }) => `${getAngle(idx, max)}deg`});
`;

class App extends Component {
  render() {
    return (
      <MockAvaterManual src={icon} width="80" max={8} idx={0} />
    )
  }
}

import React, { Component } from "react";
import icon from "./icon.png";
import styled from "styled-components";

const randomAngle = () => {
  const num = 7; // ランダムに出したい色数
  return (Math.ceil(Math.random() * num) * 360) / num;
};

// ここでhue-rotate使う
const MockAvater = styled.img`
  filter: hue-rotate(${() => `${randomAngle()}deg`});
`;

class App extends Component {
  render() {
    return (
      <div className="App">
        <MockAvater src={icon} width="80" />
      </div>
    );
  }
}