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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>Cropper.js</title>
<link rel="stylesheet" href="../css/cropper.css">
<style>
.container {
margin: 20px auto;
max-width: 960px;
}
img {
max-width: 100%;
}
.row,
.preview {
overflow: hidden;
}
.col {
float: left;
}
.col-6 {
width: 50%;
}
.col-3 {
width: 25%;
}
.col-2 {
width: 16.7%;
}
.col-1 {
width: 8.3%;
}
</style>
</head>
<body>
<div class="container">
<h1>Customize preview for Cropper</h1>
<div class="row">
<div class="col col-6">
<img id="image" src="../images/picture.jpg" alt="Picture">
</div>
<div class="col col-3">
<div class="preview"></div>
</div>
<div class="col col-2">
<div class="preview"></div>
</div>
<div class="col col-1">
<div class="preview"></div>
</div>
</div>
</div>
<script src="../js/cropper.js"></script>
<script>
function each(arr, callback) {
var length = arr.length;
var i;
for (i = 0; i < length; i++) {
callback.call(arr, arr[i], i, arr);
}
return arr;
}
window.addEventListener('DOMContentLoaded', function () {
var image = document.querySelector('#image');
var previews = document.querySelectorAll('.preview');
var previewReady = false;
var cropper = new Cropper(image, {
ready: function () {
var clone = this.cloneNode();
clone.className = '';
clone.style.cssText = (
'display: block;' +
'width: 100%;' +
'min-width: 0;' +
'min-height: 0;' +
'max-width: none;' +
'max-height: none;'
);
each(previews, function (elem) {
elem.appendChild(clone.cloneNode());
});
previewReady = true;
},
crop: function (event) {
if (!previewReady) {
return;
}
var data = event.detail;
var cropper = this.cropper;
var imageData = cropper.getImageData();
var previewAspectRatio = data.width / data.height;
each(previews, function (elem) {
var previewImage = elem.getElementsByTagName('img').item(0);
var previewWidth = elem.offsetWidth;
var previewHeight = previewWidth / previewAspectRatio;
var imageScaledRatio = data.width / previewWidth;
elem.style.height = previewHeight + 'px';
previewImage.style.width = imageData.naturalWidth / imageScaledRatio + 'px';
previewImage.style.height = imageData.naturalHeight / imageScaledRatio + 'px';
previewImage.style.marginLeft = -data.x / imageScaledRatio + 'px';
previewImage.style.marginTop = -data.y / imageScaledRatio + 'px';
});
},
});
});
</script>
</body>
</html>
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