JSFiddle - React, Tailwind, and code Playground

by DSDmark

HTML

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>SketchBoard</title>
    <link rel="stylesheet" href="assets/css/style.css" />
  </head>
  <body>
    <!-- <div class="sketchColor">
      <input type="text" id="sketchColor" placeholder="Enter a Color Name" />
      <button type="button" id="changeColor" onclick="getInputValue()">
        Change Color
      </button>
    </div>
    <canvas id="cvs"></canvas> -->
    <!-- =================================== -->
<!--     <canvas id="cvs"></canvas> -->
 <div class="color-picker">
      <div class="container">
        <div class="color-spectrum">
          <div class="color-handle"></div>
          <canvas width="500" height="176"></canvas>
        </div>
        <div class="hue">
          <div class="hue-handle"></div>
          <div class="hue-bar"></div>
        </div>
        <div class="picked-color"></div>
      </div>
    </div>
    <!-- =========================================== -->
    <!-- <script defer src="/assets/js/index.js"></script> -->
    <script defer src="test.js"></script>
  </body>
</html>

CSS

/* html {
  box-sizing: border-box;
}

*,
*:before,
*:after {
  box-sizing: inherit;
}

body {
  font-family: "Roboto", "Lucida Grande", sans-serif;
}

.main {
  width: 500px;
  height: 100vh;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.container {
  -webkit-box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
  box-shadow: 0px 1px 4px 0px rgba(0, 0, 0, 0.2);
}

.color-handle,
.hue-handle {
  width: 20px;
  height: 20px;
  border-radius: 10px;
  background: red;
  border: 2px solid #fff;
  cursor: pointer;
}

.color-spectrum {
  position: relative;
}

.color-handle {
  position: absolute;
  top: -10px;
  left: -10px;
  will-change: transform;
}

.hue {
  position: relative;
  margin: 0 auto;
  padding: 1.5em 0;
  width: 80%;
}

.hue-bar {
  position: relative;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(
    to right,
    hsl(0, 100%, 50%),
    hsl(60, 100%, 50%),
    hsl(120, 100%, 50%),
    hsl(180, 100%, 50%),
    hsl(240, 100%, 50%),
    hsl(300, 100%, 50%),
    hsl(360, 100%, 50%)
  );
  z-index: 1;
}
.hue-handle {
  position: absolute;
  left: -10px;
  top: 18px;
  z-index: 2;
  will-change: transform;
}
.hue-handle.hue-handle--animatable {
  transition: transform 0.3s cubic-bezier(0, 0, 0.3, 1);
}

.color-picker canvas {
  display: block;
}

.picked-color {
  width: 100%;
  font-family: 400;
  height: 100px;
  background: #ccc;
  margin-bottom: 1.5em;
  display: flex;
  align-items: center;
  justify-content: space-around;
  text-align: center;
}

body {
  display: grid;
  place-items: center;
  min-height: 100vh;
} */

JavaScript

/* const ColorPicker = {
  mainFunction() {
    this.canvas = document.getElementById("cvs");
    this.CH = this.canvas.height = 400;
    this.CW = this.canvas.width = 400;

    this.canvas.style.background = "black";
    this.ctx = this.canvas.getContext("2d");
    // Add three color stops

    this.gradient = this.ctx.createLinearGradient(0, 0, this.CW, 0);
    this.gradient.addColorStop(0.2, "red");
    this.gradient.addColorStop(0.5, "black");
    this.gradient.addColorStop(1, "white");
    this.ctx.fillStyle = this.gradient;

    this.ctx.fillRect(0, 0, this.CW, this.CW / 2);
    // Set the fill style and draw a rectangle
  }
};

ColorPicker.mainFunction();
class ColorPicker{
constructor(){
this.canvas = document.getElementById("cvs");
this.CH = this.canvas.height = 400;
    this.CW = this.canvas.width = 400;

    this.canvas.style.background = "black";
    this.ctx = this.canvas.getContext("2d");
    // Add three color stops

    this.gradient = this.ctx.createLinearGradient(0, 0, this.CW, 0);
    this.gradient.addColorStop(0, `rgb(255, 153, 255)`);
  
    this.gradient.addColorStop(1, `rgb(255, 0, 0)`);
    this.ctx.fillStyle = this.gradient;

    this.ctx.fillRect(0, 0, this.CW, this.CW / 2);
    // Set the fill style and draw a rectangle
}
}

let picker = new ColorPicker();


==========================

class ColorPicker {
  constructor() {
    this.colorPickerEl = document.querySelector("canvas");
    this.hueBarEl = document.querySelector(".hue");
    this.hueHandleEl = document.querySelector(".hue-handle");
    this.colorHandleEl = document.querySelector(".color-handle");
    this.pickedColorEl = document.querySelector(".picked-color");
  
    const colorPickerBCR = this.colorPickerEl.getBoundingClientRect();
    const huePickerBCR = this.hueBarEl.getBoundingClientRect();
  
    this.huePickerX = huePickerBCR.left;
    this.canvasX = colorPickerBCR.left;
    this.canvasY = colorPickerBCR.top;
  
    this.canvasWidth = colorPickerBCR.width;
   ...