THE WORLD'S LARGEST WEB DEVELOPER SITE
×

HOW TO

HowTo Home

Menus

Icon Bar Menu Icon Accordion Tabs Vertical Tabs Tab Headers Full Page Tabs Top Navigation Responsive Topnav Search Bar Fixed Sidebar Side Navigation Fullscreen Navigation Off-Canvas Menu Hover Sidenav Buttons Horizontal Scroll Menu Vertical Menu Bottom Navigation Responsive Bottom Nav Bottom Border Nav Links Right Aligned Menu Links Fixed Menu Slide Down Bar on Scroll Sticky Navbar Hover Dropdowns Click Dropdowns Dropdown in Topnav Dropdown in Sidenav Mega Menu Pagination Breadcrumbs Button Group Vertical Button Group

Images

Slideshow Slideshow Gallery Modal Images Lightbox Responsive Image Grid Image Grid Tab Gallery Image Overlay Image Overlay Zoom Image Overlay Icon Image Effects Image Text Image Text Blocks Transparent Image Text Full Page Image Hero Image Rounded Images Avatar Images Responsive Images Center Images Thumbnails Meet the Team Sticky Image Flip an Image Shake an Image Portfolio Gallery Portfolio with Filtering Image Zoom Image Magnifier Glass Image Comparison Slider

Buttons

Alert Buttons Outline Buttons Animated Buttons Button on Image Social Media Buttons Loading Buttons Icon Buttons Next/prev Buttons Block Buttons Text Buttons Round Buttons Scroll To Top Button

Forms

Login Form Signup Form Contact Form Newsletter Responsive Form Clear Input Field Copy Text to Clipboard Animated Search Search Button Fullscreen Search Custom Checkbox/Radio Custom Select Toggle Switch Check Checkbox Password Validation Toggle Password Visibility Multiple Step Form Autocomplete

Filters

Filter List Filter Table Filter Elements Filter Dropdown Sort List Sort Table

Tables

Zebra Striped Table Responsive Tables Comparison Table

More

Fullscreen Video Modal Boxes Timeline Scroll Indicator Progress Bars Skill Bar Range Sliders Tooltips Popups Collapsible Calendar HTML Includes To Do List Loaders Star Rating User Rating Overlay Effect Contact Chips Cards Profile Card Alerts Notes Labels Circles Coupon Fixed Footer Equal Height Clearfix Snackbar Scroll Drawing Sticky Header Pricing Table Parallax Aspect Ratio Build a Website Toggle Like/Dislike Toggle Hide/Show Toggle Text Toggle Class Add Class Remove Class Active Class Zoom Hover Arrows Shapes Browser Window Custom Scrollbar Device Look Placeholder Color Vertical Line Animate Icons Countdown Timer Typewriter Coming Soon Page Center Website Chat Messages Split Screen Testimonials Quotes Slideshow Closable List Items Draggable HTML Element Trigger Button on Enter Syntax Highlighter JS Animations Contact Section

Grid

2 Column Layout 3 Column Layout 4 Column Layout Expanding Grid List Grid View Mixed Column Layout Blog Layout

Google

Google Maps Google Translate Google Charts Google Fonts

Converters

Convert Weight Convert Temperature Convert Length Convert Speed

How TO - Image Zoom


Learn how to create an image zoom.


Image Zoom

Mouse over the image:

Zoom Preview:

Try it Yourself »


Create an Image Zoom

Step 1) Add HTML:

Example

<div class="img-zoom-container">
  <img id="myimage" src="img_fjords.jpg" width="300" height="200">
  <div id="myresult" class="img-zoom-result"></div>
</div>

Step 2) Add CSS:

The container must have a "relative" positioning.

Example

* {box-sizing: border-box;}
.img-zoom-container {
  position: relative;
}
.img-zoom-lens {
  position: absolute;
  border: 1px solid #d4d4d4;
  /*set the size of the lens:*/
  width: 40px;
  height: 40px;
}
.img-zoom-result {
  border: 1px solid #d4d4d4;
  /*set the size of the result div:*/
  width: 300px;
  height: 300px;
}


Step 3) Add JavaScript:

Example

function imageZoom(imgID, resultID) {
  var img, lens, result, cx, cy;
  img = document.getElementById(imgID);
  result = document.getElementById(resultID);
  /*create lens:*/
  lens = document.createElement("DIV");
  lens.setAttribute("class", "img-zoom-lens");
  /*insert lens:*/
  img.parentElement.insertBefore(lens, img);
  /*calculate the ratio between result DIV and lens:*/
  cx = result.offsetWidth / lens.offsetWidth;
  cy = result.offsetHeight / lens.offsetHeight;
  /*set background properties for the result DIV*/
  result.style.backgroundImage = "url('" + img.src + "')";
  result.style.backgroundSize = (img.width * cx) + "px " + (img.height * cy) + "px";
  /*execute a function when someone moves the cursor over the image, or the lens:*/
  lens.addEventListener("mousemove", moveLens);
  img.addEventListener("mousemove", moveLens);
  /*and also for touch screens:*/
  lens.addEventListener("touchmove", moveLens);
  img.addEventListener("touchmove", moveLens);
  function moveLens(e) {
    var pos, x, y;
    /*prevent any other actions that may occur when moving over the image*/
    e.preventDefault();
    /*get the cursor's x and y positions:*/
    pos = getCursorPos(e);
    /*calculate the position of the lens:*/
    x = pos.x - (lens.offsetWidth / 2);
    y = pos.y - (lens.offsetHeight / 2);
    /*prevent the lens from being positioned outside the image:*/
    if (x > img.width - lens.offsetWidth) {x = img.width - lens.offsetWidth;}
    if (x < 0) {x = 0;}
    if (y > img.height - lens.offsetHeight) {y = img.height - lens.offsetHeight;}
    if (y < 0) {y = 0;}
    /*set the position of the lens:*/
    lens.style.left = x + "px";
    lens.style.top = y + "px";
    /*display what the lens "sees":*/
    result.style.backgroundPosition = "-" + (x * cx) + "px -" + (y * cy) + "px";
  }
  function getCursorPos(e) {
    var a, x = 0, y = 0;
    e = e || window.event;
    /*get the x and y positions of the image:*/
    a = img.getBoundingClientRect();
    /*calculate the cursor's x and y coordinates, relative to the image:*/
    x = e.pageX - a.left;
    y = e.pageY - a.top;
    /*consider any page scrolling:*/
    x = x - window.pageXOffset;
    y = y - window.pageYOffset;
    return {x : x, y : y};
  }
}

Step 4) Initiate the Zoom Effect:

Example

<script>
imageZoom("myimage", "myresult");
</script>
Try it Yourself »