Dotted custom cursor style

Playing around with a custom dot cursor style using HTML, CSS and JavaScript. Demo and Download options available.

HTML Snippet

<header class="header container">
<main class="main container">
    <div class="col">
        <a href="#">
            <img src="https://source.unsplash.com/PjXHrNQT56o/800x500">
        </a>
    </div>
    
    <div class="col">
        <a href="#">
            <img src="https://source.unsplash.com/PfinelUfh4E/800x500">
        </a>
    </div>
    
    <div class="col">
        <a href="#">
            <img src="https://source.unsplash.com/Pb4FBi7Oq7o/800x500">
        </a>
    </div>
    
    <div class="col">
        <a href="#">
            <img src="https://source.unsplash.com/stL-jEO7FGc/800x500">
        </a>
    </div>
    
    <div class="col">
        <a href="#">
            <img src="https://source.unsplash.com/Ws92xzbSris/800x500">
        </a>
    </div>
    
    <div class="col">
        <a href="#">
            <img src="https://source.unsplash.com/N7Q0Ir-hXeA/800x500">
        </a>
    </div>
</main>

<div class="cursor-dot-outline"></div>
<div class="cursor-dot"></div>

CSS Code

@import url(https://fonts.googleapis.com/css?family=Open+Sans:400|Raleway:300);
*,
*:before,
*:after {
  box-sizing: border-box;
}

html {
  font-family: "Open Sans", Helvetica, arial, sans-serif;
  color: #dc5656;
  background-color: #333333;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "Raleway", "Open Sans", sans-serif;
  text-align: center;
}

a {
  color: #333333;
  text-decoration: none;
}

img {
  max-width: 100%;
}

.header {
  position: relative;
  overflow: visible;
}
.header:after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 50px;
  height: 2px;
  background-color: #dc5656;
  -webkit-transform: translateX(-50%);
          transform: translateX(-50%);
}

.pen__subheading {
  margin-bottom: 0;
}
.pen__subheading a {
  color: #dc5656;
}
.pen__subheading a:hover, .pen__subheading a:focus {
  color: #e58080;
}

.container {
  overflow: hidden;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.col {
  padding: 1rem;
}
@media (min-width: 800px) {
  .col {
    width: 50%;
    float: left;
  }
  .col:nth-of-type(2n + 1) {
    clear: left;
  }
}
.col.col--full {
  width: 100%;
}

html,
html *,
body,
body * {
  cursor: none;
}

.cursor-dot,
.cursor-dot-outline {
  pointer-events: none;
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  opacity: 0;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  transition: opacity 0.3s ease-in-out, -webkit-transform 0.3s ease-in-out;
  transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out;
  transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out, -webkit-transform 0.3s ease-in-out;
}

.cursor-dot {
  width: 8px;
  height: 8px;
  background-color: #dc5656;
}

.cursor-dot-outline {
  width: 40px;
  height: 40px;
  background-color: rgba(229, 128, 128, 0.5);
}

JavaScript

var cursor = {
    delay: 8,
    _x: 0,
    _y: 0,
    endX: (window.innerWidth / 2),
    endY: (window.innerHeight / 2),
    cursorVisible: true,
    cursorEnlarged: false,
    $dot: document.querySelector('.cursor-dot'),
    $outline: document.querySelector('.cursor-dot-outline'),
    
    init: function() {
        // Set up element sizes
        this.dotSize = this.$dot.offsetWidth;
        this.outlineSize = this.$outline.offsetWidth;
        
        this.setupEventListeners();
        this.animateDotOutline();
    },
    
    setupEventListeners: function() {
        var self = this;
        
        // Anchor hovering
        document.querySelectorAll('a').forEach(function(el) {
            el.addEventListener('mouseover', function() {
                self.cursorEnlarged = true;
                self.toggleCursorSize();
            });
            el.addEventListener('mouseout', function() {
                self.cursorEnlarged = false;
                self.toggleCursorSize();
            });
        });
        
        // Click events
        document.addEventListener('mousedown', function() {
            self.cursorEnlarged = true;
            self.toggleCursorSize();
        });
        document.addEventListener('mouseup', function() {
            self.cursorEnlarged = false;
            self.toggleCursorSize();
        });
  
        document.addEventListener('mousemove', function(e) {
            // Show the cursor
            self.cursorVisible = true;
            self.toggleCursorVisibility();

            // Position the dot
            self.endX = e.pageX;
            self.endY = e.pageY;
            self.$dot.style.top = self.endY + 'px';
            self.$dot.style.left = self.endX + 'px';
        });
        
        // Hide/show cursor
        document.addEventListener('mouseenter', function(e) {
            self.cursorVisible = true;
            self.toggleCursorVisibility();
            self.$dot.style.opacity = 1;
            self.$outline.style.opacity = 1;
        });
        
        document.addEventListener('mouseleave', function(e) {
            self.cursorVisible = true;
            self.toggleCursorVisibility();
            self.$dot.style.opacity = 0;
            self.$outline.style.opacity = 0;
        });
    },
    
    animateDotOutline: function() {
        var self = this;
        
        self._x += (self.endX - self._x) / self.delay;
        self._y += (self.endY - self._y) / self.delay;
        self.$outline.style.top = self._y + 'px';
        self.$outline.style.left = self._x + 'px';
        
        requestAnimationFrame(this.animateDotOutline.bind(self));
    },
    
    toggleCursorSize: function() {
        var self = this;
        
        if (self.cursorEnlarged) {
            self.$dot.style.transform = 'translate(-50%, -50%) scale(0.75)';
            self.$outline.style.transform = 'translate(-50%, -50%) scale(1.5)';
        } else {
            self.$dot.style.transform = 'translate(-50%, -50%) scale(1)';
            self.$outline.style.transform = 'translate(-50%, -50%) scale(1)';
        }
    },
    
    toggleCursorVisibility: function() {
        var self = this;
        
        if (self.cursorVisible) {
            self.$dot.style.opacity = 1;
            self.$outline.style.opacity = 1;
        } else {
            self.$dot.style.opacity = 0;
            self.$outline.style.opacity = 0;
        }
    }
}

cursor.init();

Preview