HomeJavascriptColoring App | HTML, CSS and Javascript Project

Coloring App | HTML, CSS and Javascript Project

Hey everyone. Welcome to today’s tutorial. In today’s tutorial, we will learn how to create a ‘Paint App’. To build this project we would need HTML, CSS, and Javascript. Let’s discover how to build this project in a few simple and easy-to-follow steps.

Video Tutorial:

Hey everyone. Welcome to today’s tutorial. In today’s tutorial, we will learn how to create a ‘Paint App’. To build this project we would need HTML, CSS, and Javascript. Let’s discover how to build this project in a few simple and easy-to-follow steps.

Project Folder Structure:

Let’s build the project folder structure before we begin writing the code. We create a project folder called ‘Paint App’. Inside this folder, we have three files. These files are index.html, style.css, and script.js.

HTML:

Let’s build the project folder structure before we begin writing the code. We create a project folder called ‘Paint App’. Inside this folder, we have three files. These files are index.html, style.css, and script.js.

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Paint App</title>
    <!-- Google Fonts -->
    <link
      href="https://fonts.googleapis.com/css2?family=Poppins&display=swap"
      rel="stylesheet"
    />
    <!-- Stylesheet -->
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <div class="container">
      <!-- SVG -->
      <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 500">
        <defs>
          <style>
            .cls-2 {
              fill: #fff;
              stroke: #000;
              stroke-miterlimit: 10;
              stroke-width: 3.68px;
            }
            .cls-3 {
              fill: #050506;
            }
            .cls-4 {
              fill: #09090b;
            }
            .cls-5 {
              fill: #111012;
            }
          </style>
        </defs>
        <!-- Border -->
        <path
          class="cls-2"
          d="M456.26,472.69a66.58,66.58,0,0,0-4.88-8.67c-5.13-7.93-10.4-15.76-15.11-24a87.09,87.09,0,0,1-10.35-30.12c-1.47-9.31-1.23-18.65-1-28,.38-14.55,1.89-29,2.67-43.56A117.73,117.73,0,0,0,425,304.29c-7.36-30.56-22.76-56-48.83-74.23-11.55-8.1-23.89-14.63-37.64-18.08-15.93-4-32-2.74-48-.35-9.2,1.38-17.83,4.62-26.4,8.08-9.32,3.77-18.56,7.76-28.22,10.62-8.07,2.39-16.26,4.32-24.77,4.09-13.57-.36-23.12-7.1-29.16-19a22.55,22.55,0,0,1-1.86-14,75.8,75.8,0,0,1,11.38-29.05c2.89-4.55,6.06-8.93,9.14-13.36A158.36,158.36,0,0,0,221.84,117c5.25-16.34,7.14-32.83,2.8-49.68-3.22-12.51-9-23.41-19.69-31.2-1.68-1.22-3.26-2.58-4.91-3.84C190.09,24.6,178.66,21,166.32,19.94a128.73,128.73,0,0,0-34.44,1.79c-11.15,2.08-22,5-32,10.74C81.44,43.08,66.17,57.39,53.19,74.08c-8.1,10.43-12,22.42-9.94,35.91,2.33,15.39,9.36,28.13,21.77,37.52C76.17,155.94,89.09,160,103,160.7c9.63.49,19.3.53,28.78-2.34a5.73,5.73,0,0,1-1.52,2.89,322.53,322.53,0,0,0-20.41,33.84c-13.66,26.23-23.45,53.75-27.45,83.18-2.65,19.52-2.52,39,1.54,58.29,3.91,18.63,11.22,35.8,23,50.87a22.94,22.94,0,0,1,4.42,9.74c2.54,12.06,3.08,24.3,3.67,36.55a74.42,74.42,0,0,0,2.93,19c2.21,7,6.9,11.35,13.55,14a38.92,38.92,0,0,0,30.59-.33,2.37,2.37,0,0,1,3,.4,34.54,34.54,0,0,0,16,7.88,145.58,145.58,0,0,0,15.43,2c9.36.74,16.85-2.56,22.34-10.25a67,67,0,0,0,3.88-6.38,88.85,88.85,0,0,0,8.46-22.33c.3-1.26.47-2.39,2.41-2.55a224.65,224.65,0,0,0,38.6-6.62,2.34,2.34,0,0,1,2.21.05c.26,3.52.6,7.14.77,10.76a123.78,123.78,0,0,0,3.1,21.24,11.24,11.24,0,0,0,7.11,8.39,25.18,25.18,0,0,0,12.81,1.77,30.42,30.42,0,0,1,8.92,1.3c8.79,3.11,17.76,5,27.17,4a17.71,17.71,0,0,0,4.82-1.12,43.47,43.47,0,0,0,15.3-10.45c6.77-7,10.78-15.43,13.06-24.76a240.06,240.06,0,0,0,6.34-45.59,3.13,3.13,0,0,0,.22-1.51c0,.49-.14,1.05.36,1.44a206.63,206.63,0,0,0,10,23.74c12.33,25.81,31.37,45.15,56.47,58.65a32.75,32.75,0,0,0,9.5,3.77c2.19.41,4.45.62,6-1.37S457.17,474.71,456.26,472.69Z"
        />
        <!-- Mask/Background -->
        <mask id="mask">
          <path
            d="M456.26,472.69a66.58,66.58,0,0,0-4.88-8.67c-5.13-7.93-10.4-15.76-15.11-24a87.09,87.09,0,0,1-10.35-30.12c-1.47-9.31-1.23-18.65-1-28,.38-14.55,1.89-29,2.67-43.56A117.73,117.73,0,0,0,425,304.29c-7.36-30.56-22.76-56-48.83-74.23-11.55-8.1-23.89-14.63-37.64-18.08-15.93-4-32-2.74-48-.35-9.2,1.38-17.83,4.62-26.4,8.08-9.32,3.77-18.56,7.76-28.22,10.62-8.07,2.39-16.26,4.32-24.77,4.09-13.57-.36-23.12-7.1-29.16-19a22.55,22.55,0,0,1-1.86-14,75.8,75.8,0,0,1,11.38-29.05c2.89-4.55,6.06-8.93,9.14-13.36A158.36,158.36,0,0,0,221.84,117c5.25-16.34,7.14-32.83,2.8-49.68-3.22-12.51-9-23.41-19.69-31.2-1.68-1.22-3.26-2.58-4.91-3.84C190.09,24.6,178.66,21,166.32,19.94a128.73,128.73,0,0,0-34.44,1.79c-11.15,2.08-22,5-32,10.74C81.44,43.08,66.17,57.39,53.19,74.08c-8.1,10.43-12,22.42-9.94,35.91,2.33,15.39,9.36,28.13,21.77,37.52C76.17,155.94,89.09,160,103,160.7c9.63.49,19.3.53,28.78-2.34a5.73,5.73,0,0,1-1.52,2.89,322.53,322.53,0,0,0-20.41,33.84c-13.66,26.23-23.45,53.75-27.45,83.18-2.65,19.52-2.52,39,1.54,58.29,3.91,18.63,11.22,35.8,23,50.87a22.94,22.94,0,0,1,4.42,9.74c2.54,12.06,3.08,24.3,3.67,36.55a74.42,74.42,0,0,0,2.93,19c2.21,7,6.9,11.35,13.55,14a38.92,38.92,0,0,0,30.59-.33,2.37,2.37,0,0,1,3,.4,34.54,34.54,0,0,0,16,7.88,145.58,145.58,0,0,0,15.43,2c9.36.74,16.85-2.56,22.34-10.25a67,67,0,0,0,3.88-6.38,88.85,88.85,0,0,0,8.46-22.33c.3-1.26.47-2.39,2.41-2.55a224.65,224.65,0,0,0,38.6-6.62,2.34,2.34,0,0,1,2.21.05c.26,3.52.6,7.14.77,10.76a123.78,123.78,0,0,0,3.1,21.24,11.24,11.24,0,0,0,7.11,8.39,25.18,25.18,0,0,0,12.81,1.77,30.42,30.42,0,0,1,8.92,1.3c8.79,3.11,17.76,5,27.17,4a17.71,17.71,0,0,0,4.82-1.12,43.47,43.47,0,0,0,15.3-10.45c6.77-7,10.78-15.43,13.06-24.76a240.06,240.06,0,0,0,6.34-45.59,3.13,3.13,0,0,0,.22-1.51c0,.49-.14,1.05.36,1.44a206.63,206.63,0,0,0,10,23.74c12.33,25.81,31.37,45.15,56.47,58.65a32.75,32.75,0,0,0,9.5,3.77c2.19.41,4.45.62,6-1.37S457.17,474.71,456.26,472.69Z"
          />
        </mask>
        <g id="group" mask="url(#mask)"></g>

        <!-- Mouth -->
        <path
          class="cls-3"
          d="M104.42,126a30.81,30.81,0,0,1-1.85,9.74c-3.3,8-10.85,11.6-19,9.09a23,23,0,0,1-8.58-4.93c-.68-.61-1.5-1.34-.74-2.38s1.81-.73,2.69,0a20.24,20.24,0,0,0,9.35,4.69,11.05,11.05,0,0,0,11.16-3.93c3.06-3.71,3.89-8.16,3.77-12.86a3,3,0,0,0-1.39-2.29,16,16,0,0,1-4.59-6.56,8.75,8.75,0,0,1-.5-1.8,1.47,1.47,0,0,1,.93-1.77c1-.34,1.57.15,1.93,1,.2.48.38,1,.59,1.44a13.37,13.37,0,0,0,14.91,8.1c.62-.1,1.22-.27,1.84-.33a1.52,1.52,0,0,1,1.83,1.28c.17,1-.44,1.53-1.33,1.8a17.82,17.82,0,0,1-8,.35C106.45,126.56,105.55,126.3,104.42,126Z"
        />
        <!-- Eyebrow -->
        <path
          class="cls-4"
          d="M159.1,55.84a20.36,20.36,0,0,0-2.27-9.41c-3-5.39-8.06-7.19-13.69-4.82-.28.12-.55.29-.83.42-1,.46-2.06.92-2.72-.29-.81-1.46.51-2,1.45-2.58a13,13,0,0,1,14.82,1.17,14.64,14.64,0,0,1,2.91,3.22,22.43,22.43,0,0,1,3.41,13.93c-.06,1.15-.31,2.44-1.92,2.22-1.42-.2-1.23-1.43-1.22-2.45C159,56.83,159.08,56.42,159.1,55.84Z"
        />
        <!-- Nose -->
        <path
          class="cls-5"
          d="M66.86,102c3.38-.24,6.57,3.72,6.88,7.21a1.52,1.52,0,0,1-2.95.57,9.4,9.4,0,0,0-1.35-3.11c-1.41-1.82-2.66-2-4.33-.46-.78.73-1.54,1.25-2.4.54-1.05-.87-.5-1.89.16-2.75A4.59,4.59,0,0,1,66.86,102Z"
        />
        <!-- Eyes -->
        <path
          class="cls-3"
          d="M145.84,86.7a7.41,7.41,0,0,0-1.83-.24c-1.57-.14-3.07.43-5.17.65.48-.72.69-1,.93-1.38a28,28,0,0,0,5.08-21.53c-.66-4.13-2.34-7.81-6.28-9.88-3.52-1.86-7.82-1-11.12,2.26-5.93,5.86-8.17,13.14-7.68,21.28.37,6.15,2.39,11.4,9.09,13.67l-1.31,1.12c-.47.4-1,.8-1.41,1.22-1.72,1.63-2,2.56-1.06,3.34,1.41,1.12,2.28-.14,3.18-.92a28.34,28.34,0,0,1,15.66-7,12.78,12.78,0,0,0,1.84-.28,1.17,1.17,0,0,0,.9-1.13A1.21,1.21,0,0,0,145.84,86.7ZM132.32,65.78a8.55,8.55,0,0,1,2.14-8.58,1.76,1.76,0,0,1,2.23-.31,7.26,7.26,0,0,1,3.69,3.59,18.34,18.34,0,0,1,1.84,7.85c0,3.23-.93,4.06-3.59,3.54A7.83,7.83,0,0,1,132.32,65.78Z"
        />
      </svg>
      <div class="options">
        <div class="color-options">
          <label for="color-input">Color:</label>
          <input type="color" id="color-input" value="#0075ff" />
        </div>
        <div class="size">
          <label for="size-input">Brush Size:</label>
          <input type="range" min="5" max="100" value="5" id="size-input" />
        </div>
      </div>
    </div>
    <!-- Script -->
    <script src="script.js"></script>
  </body>
</html>

CSS:

Let’s build the project folder structure before we begin writing the code. We create a project folder called ‘Paint App’. Inside this folder, we have three files. These files are index.html, style.css, and script.js.

* {
  padding: 0;
  margin: 0;
}
body {
  background-color: #0075ff;
}
.container {
  width: 500px;
  height: 500px;
  background-color: #ffffff;
  position: absolute;
  transform: translate(-50%, -50%);
  top: 50%;
  left: 50%;
  border-radius: 0.5em;
}
svg {
  fill: #ffffff;
}
.options {
  padding: 1em 0;
  margin-top: 1em;
  display: flex;
  align-items: center;
  justify-content: space-around;
  background-color: #ffffff;
  font-family: "Poppins", sans-serif;
  border-radius: 0.5em;
}
label {
  margin-right: 0.5em;
}
#color-input {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-color: transparent;
  width: 40px;
  height: 40px;
  border: none;
}
#color-input::-webkit-color-swatch {
  border: 3px solid #000000;
  border-radius: 5px;
}
#color-input::-moz-color-swatch {
  border-radius: 50%;
  border: 3px solid #000000;
}
.color-options,
.size {
  display: flex;
  align-items: center;
}

Javascript:

Finally, we add functionality using Javascript. Once again copy the code below and paste it into your script file.

The steps included in creating are:

  • Create variable initializations, and references to HTML elements. Just make sure to set the height and width variables to proper values based on SVG “viewbox” values.
  • Then create ‘isTouchDevice()’, which gives us the device type so that we could use it for responsible behavior. This also helps us to decide on the event to use based on device type.
  • Handle inputs for setting the color and size of the brush
  • When the user clicks/touches the image we get the x and y position
const container = document.querySelector(".container");
const group = document.querySelector("#group");
const colorInput = document.querySelector("#color-input");
const sizeInput = document.querySelector("#size-input");
let currentColor, currentSize, svgWidth, svgHeight, initialX, initialY;
let circles = [];
let deviceType = "";
let events = {
  mouse: {
    click: "click",
  },
  touch: {
    click: "touchstart",
  },
};

const isTouchDevice = () => {
  try {
    //We try to create TouchEvent. It would fail for desktops and throw error
    document.createEvent("TouchEvent");
    deviceType = "touch";
    return true;
  } catch (e) {
    deviceType = "mouse";
    return false;
  }
};

//Choose color
colorInput.addEventListener("input", () => {
  currentColor = colorInput.value;
});

//Choose sie
sizeInput.addEventListener("input", () => {
  currentSize = sizeInput.value;
});

isTouchDevice();

container.addEventListener(events[deviceType].click, (e) => {
  let mouseX = !isTouchDevice() ? e.clientX : e.touches[0].clientX;
  let mouseY = !isTouchDevice() ? e.clientY : e.touches[0].clientY;
  let relativeX = mouseX - container.getBoundingClientRect().left;
  let relativeY = mouseY - container.getBoundingClientRect().top;

  //Inside the dino part
  let finalX = relativeX / initialX;
  let finalY = relativeY / initialY;
  circles.push(
    `<circle cx="${finalX}" cy="${finalY}" fill="${currentColor}" r="${currentSize}"/>`
  );
  group.innerHTML = circles.join("");
});

window.onload = () => {
  currentColor = "#0075ff";
  colorInput.value = currentColor;
  currentSize = 5;
  sizeInput.value = currentSize;
  [svgHeight, svgWidth] = [500, 500];
  initialX = container.clientWidth / svgWidth;
  initialY = container.clientHeight / svgHeight;
  circles = [];
};

Go ahead and customize the project the way you like. If you have any queries, suggestions, or feedback comment below. Download the source code by clicking on the ‘Download Code’ button below.

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