Snake Highlighting Login Form using HTML CSS and JavaScript

Slither into the world of dynamic web design with our Snake Highlighting Login Form tutorial! In this guide, we’ll blend the fundamentals of HTML, CSS, and JavaScript to craft a login form that comes to life with the mesmerizing movement of a snake. Join us as we explore how to infuse your forms with personality and interactivity, creating a captivating user experience that’s both functional and fun. Let’s embark on this creative journey together and elevate your login page to new heights!

I would recommend you don’t just copy and paste the code, just look at the code and type by understanding it.

Demo

See the Pen Snake highlight by Mikael Ainalem (@ainalem) on CodePen.

HTML Code

Starter Template

<!doctype html>
<html lang="en">

<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <!-- CSS -->
    <link rel="stylesheet" href="style.css">

    <title>Snake Highlighting Login Form using HTML CSS and JavaScript - Coding Torque</title>
</head>

<body>
    <!-- Further code here -->

    <script src="script.js"></script>
</body>

</html>

Paste the below code in your `<body>` tag.

<div class="page">
  <div class="container">
    <div class="left">
      <div class="login">Login</div>
      <div class="eula">By logging in you agree to the ridiculously long terms that you didn't bother to read</div>
    </div>
    <div class="right">
      <svg viewBox="0 0 320 300">
        <defs>
          <linearGradient
                          inkscape:collect="always"
                          id="linearGradient"
                          x1="13"
                          y1="193.49992"
                          x2="307"
                          y2="193.49992"
                          gradientUnits="userSpaceOnUse">
            <stop
                  style="stop-color:#ff00ff;"
                  offset="0"
                  id="stop876" />
            <stop
                  style="stop-color:#ff0000;"
                  offset="1"
                  id="stop878" />
          </linearGradient>
        </defs>
        <path d="m 40,120.00016 239.99984,-3.2e-4 c 0,0 24.99263,0.79932 25.00016,35.00016 0.008,34.20084 -25.00016,35 -25.00016,35 h -239.99984 c 0,-0.0205 -25,4.01348 -25,38.5 0,34.48652 25,38.5 25,38.5 h 215 c 0,0 20,-0.99604 20,-25 0,-24.00396 -20,-25 -20,-25 h -190 c 0,0 -20,1.71033 -20,25 0,24.00396 20,25 20,25 h 168.57143" />
      </svg>
      <div class="form">
        <label for="email">Email</label>
        <input type="email" id="email">
        <label for="password">Password</label>
        <input type="password" id="password">
        <input type="submit" id="submit" value="Submit">
      </div>
    </div>
  </div>
</div>

CSS Code

Create a file style.css and paste the code below.

@import url('https://rsms.me/inter/inter-ui.css');
::selection {
  background: #2D2F36;
}
::-webkit-selection {
  background: #2D2F36;
}
::-moz-selection {
  background: #2D2F36;
}
body {
  background: white;
  font-family: 'Inter UI', sans-serif;
  margin: 0;
  padding: 20px;
}
.page {
  background: #e2e2e5;
  display: flex;
  flex-direction: column;
  height: calc(100% - 40px);
  position: absolute;
  place-content: center;
  width: calc(100% - 40px);
}
@media (max-width: 767px) {
  .page {
    height: auto;
    margin-bottom: 20px;
    padding-bottom: 20px;
  }
}
.container {
  display: flex;
  height: 320px;
  margin: 0 auto;
  width: 640px;
}
@media (max-width: 767px) {
  .container {
    flex-direction: column;
    height: 630px;
    width: 320px;
  }
}
.left {
  background: white;
  height: calc(100% - 40px);
  top: 20px;
  position: relative;
  width: 50%;
}
@media (max-width: 767px) {
  .left {
    height: 100%;
    left: 20px;
    width: calc(100% - 40px);
    max-height: 270px;
  }
}
.login {
  font-size: 50px;
  font-weight: 900;
  margin: 50px 40px 40px;
}
.eula {
  color: #999;
  font-size: 14px;
  line-height: 1.5;
  margin: 40px;
}
.right {
  background: #474A59;
  box-shadow: 0px 0px 40px 16px rgba(0,0,0,0.22);
  color: #F1F1F2;
  position: relative;
  width: 50%;
}
@media (max-width: 767px) {
  .right {
    flex-shrink: 0;
    height: 100%;
    width: 100%;
    max-height: 350px;
  }
}
svg {
  position: absolute;
  width: 320px;
}
path {
  fill: none;
  stroke: url(#linearGradient);;
  stroke-width: 4;
  stroke-dasharray: 240 1386;
}
.form {
  margin: 40px;
  position: absolute;
}
label {
  color:  #c2c2c5;
  display: block;
  font-size: 14px;
  height: 16px;
  margin-top: 20px;
  margin-bottom: 5px;
}
input {
  background: transparent;
  border: 0;
  color: #f2f2f2;
  font-size: 20px;
  height: 30px;
  line-height: 30px;
  outline: none !important;
  width: 100%;
}
input::-moz-focus-inner { 
  border: 0; 
}
#submit {
  color: #707075;
  margin-top: 40px;
  transition: color 300ms;
}
#submit:focus {
  color: #f2f2f2;
}
#submit:active {
  color: #d0d0d2;
}

JavaScript Code

Create a file script.js and paste the code below.

var current = null;
document.querySelector('#email').addEventListener('focus', function(e) {
  if (current) current.pause();
  current = anime({
    targets: 'path',
    strokeDashoffset: {
      value: 0,
      duration: 700,
      easing: 'easeOutQuart'
    },
    strokeDasharray: {
      value: '240 1386',
      duration: 700,
      easing: 'easeOutQuart'
    }
  });
});
document.querySelector('#password').addEventListener('focus', function(e) {
  if (current) current.pause();
  current = anime({
    targets: 'path',
    strokeDashoffset: {
      value: -336,
      duration: 700,
      easing: 'easeOutQuart'
    },
    strokeDasharray: {
      value: '240 1386',
      duration: 700,
      easing: 'easeOutQuart'
    }
  });
});
document.querySelector('#submit').addEventListener('focus', function(e) {
  if (current) current.pause();
  current = anime({
    targets: 'path',
    strokeDashoffset: {
      value: -730,
      duration: 700,
      easing: 'easeOutQuart'
    },
    strokeDasharray: {
      value: '530 1386',
      duration: 700,
      easing: 'easeOutQuart'
    }
  });
});