How do I disable the script for the mobile version of the site?

Question

I customized the cursor on my site. It is now in the shape of a dot. But when I click anywhere on the mobile version of the site, that dot appears. This is very disturbing. How do I disable the code for the mobile version of the site? I need the script not to work on devices less than 1200 pixels wide

<style>

html, 
html *, 
body, 
body * {
        cursor: none;
}
.cursor-dot,
.cursor-dot-outline {
  mix-blend-mode: difference;
  pointer-events: none;
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  opacity: 0;
  position: fixed;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  -webkit-transition: opacity 0.3s ease-in-out, -webkit-transform 0.3s ease-in-out;
  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 {
  z-index:99999999;
  width: 10.0px;
  height: 10.0px;
  background-color: rgba(255, 255, 255, 1.00);
  border: solid;
  border-radius: 50%;
  border-width: 0px;
  border-color: #000;
}

.cursor-dot-outline {
  z-index:99999998;
  width: 0.0px;
  height: 0.0px;
  background-color: rgba(169, 169, 222, 0.2);
  border: solid;
  border-radius: 50%;
  border-width: 0px;
  border-color: #000;
}

</style>

<script>
    
    $("body").prepend('<div class="cursor-dot-outline"></div>');
    $("body").prepend('<div class="cursor-dot"></div>');

    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() {
        this.dotSize = this.$dot.offsetWidth;
        this.outlineSize = this.$outline.offsetWidth;
        
        this.setupEventListeners();
        this.animateDotOutline();
    },

    setupEventListeners: function() {
        var self = this;
        
        document.querySelectorAll('a').forEach(function(el) {
            el.addEventListener('mouseover', function() {
                self.cursorEnlarged = true;
                self.toggleCursorSize();
            });
            el.addEventListener('mouseout', function() {
                self.cursorEnlarged = false;
                self.toggleCursorSize();
            });
        });
        
        document.addEventListener('mousedown', function() {
            self.cursorEnlarged = true;
            self.toggleCursorSize();
        });
        document.addEventListener('mouseup', function() {
            self.cursorEnlarged = false;
            self.toggleCursorSize();
        });
  
  
        document.addEventListener('mousemove', function(e) {
            self.cursorVisible = true;
            self.toggleCursorVisibility();

            self.endX = e.clientX;
            self.endY = e.clientY;
            self.$dot.style.top = self.endY + 'px';
            self.$dot.style.left = self.endX + 'px';
        });
        
        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.$dot.style.transform = 'translate(-50%, -50%) scale(4)';
            self.$outline.style.transform = 'translate(-50%, -50%) scale(0)';
        } 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();

        
</script>

Answer 1

You can place this at the beginning of the script:

if(window.innerWidth < 1200) {
  throw new Error("Site is on mobile")
}

This will stop the execution of the script if the width is under 1200, as you want.