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How to crop multiple images with cropper js

Created at 12-Aug-2021 , By samar

Through many examples, we will learn how to resolve the "How to crop multiple images with cropper js".

You can crop multiple images with cropper js in HTML using javascript. You can select a specific image and after that, you can crop that image and you can get a preview of cropped images before upload

Crop multiple images with preview using cropper js in Bootstrap modal

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Crop multiple images with cropper js</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css" integrity="sha512-iBBXm8fW90+nuLcSKlbmrPcLa0OT92xO1BIsZ+ywDWZCvqsWgccV3gFoRBv0z+8dLJgyAHIhR35VZc2oM/gI1w==" crossorigin="anonymous" />
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
    <style>
    .g-height-50 {
        height: 50px;
    }

    .g-width-50 {
        width: 50px !important;
    }

    @media (min-width: 0){
        .g-pa-30 {
            padding: 2.14286rem !important;
        }
    }

    .g-bg-secondary {
        background-color: #fafafa !important;
    }

    .u-shadow-v18 {
        box-shadow: 0 5px 10px -6px rgba(0, 0, 0, 0.15);
    }

    .g-color-gray-dark-v4 {
        color: #777 !important;
    }

    .g-font-size-12 {
        font-size: 0.85714rem !important;
    }

    .media-comment {
        margin-top:20px
    }
    .singleImageCanvasContainer{
        overflow: hidden;
        height: 200px;
        width: 30%;
        display: inline-block;
        position: relative;
        padding-right: 0px;
        margin-right: 15px;
        border: 2px solid #dfdfdf;
        margin-bottom: 10px;
        padding: 4px;
        border-radius: .25rem;
    }

    .singleImageCanvasContainer .singleImageCanvasCloseBtn{
        position: absolute;
        right: 0;
    }
    .singleImageCanvasContainer .singleImageCanvas{
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
</style>
</head>
<body>


<!-- code by w3codegenerator.com -->
<div class="container m-5">
    <div class="row">
        <div class="col-md-12">
            <input type="file" name="file" id="file" accept="image/*" multiple />
        </div>

       
    </div>
</div>

<div class="modal" id="cropperModal">
    <div class="modal-dialog modal-lg">
        <div class="modal-content">
            <div class="modal-header">
                <h4 class="modal-title">Upload Images</h4>
               <button type="button" class="close" data-dismiss="modal">&amp;times;</button>
            </div>
            <form action="/upload-images" method="POST" enctype="multipart/form-data">
            
            <input type="hidden" id="post_img_data" name="image_data_url">
            <div class="modal-body p-4">
                <div class="img-preview"></div>
                <div id="galleryImages"></div>
                <div id="cropper">
                    <canvas id="cropperImg" width="0" height="0"></canvas>
                    <button type="button" class="cropImageBtn btn btn-danger" style="display:none;" id="cropImageBtn">Crop</button>
                </div>
                <div id="imageValidate" class="text-danger"></div>
            </div>
            <div class="modal-footer">
                <button type="submit" class="btn btn-primary">Upload</button>
            </div>
            </form>
        </div>
    </div>
</div>


<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.2/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/cropperjs/1.5.5/cropper.min.js" integrity="sha512-E4KfIuQAc9ZX6zW1IUJROqxrBqJXPuEcDKP6XesMdu2OV4LW7pj8+gkkyx2y646xEV7yxocPbaTtk2LQIJewXw==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/cropperjs/1.5.5/cropper.min.css" integrity="sha512-Aix44jXZerxlqPbbSLJ03lEsUch9H/CmnNfWxShD6vJBbboR+rPdDXmKN+/QjISWT80D4wMjtM4Kx7+xkLVywQ==" crossorigin="anonymous" referrerpolicy="no-referrer" />

<script>
    $(document).ready(function(){
        $("body").on("change", "#file", function(e){
            $('.singleImageCanvasContainer').remove();
            $('#post_img_data').val('');
        });
    })
</script>
<script>

    //Multiple image cropper and preview on creating post
    var c;
    var galleryImagesContainer = document.getElementById('galleryImages');
    var imageCropFileInput = document.getElementById('file');
    var cropperImageInitCanvas = document.getElementById('cropperImg');
    var cropImageButton = document.getElementById('cropImageBtn');
    // Crop Function On change
    function imagesPreview(input) {
        var cropper;
        //cropImageButton.className = 'show';
        var img = [];
        if (input.files.length) {
            var i = 0;
            var index = 0;
            for (let singleFile of input.files) {
                var reader = new FileReader();
                reader.onload = function(event) {
                    var blobUrl = event.target.result;
                    img.push(new Image());
                    img[i].onload = function(e) {
                        // Canvas Container
                        var singleCanvasImageContainer = document.createElement('div');
                        singleCanvasImageContainer.id = 'singleImageCanvasContainer'+index;
                        singleCanvasImageContainer.className = 'singleImageCanvasContainer';
                        // Canvas Close Btn
                        var singleCanvasImageCloseBtn = document.createElement('button');
                        var singleCanvasImageCloseBtnText = document.createTextNode('X');
                        // var singleCanvasImageCloseBtnText = document.createElement('i');
                        // singleCanvasImageCloseBtnText.className = 'fa fa-times';
                        singleCanvasImageCloseBtn.id = 'singleImageCanvasCloseBtn'+index;
                        singleCanvasImageCloseBtn.className = 'singleImageCanvasCloseBtn';
                        singleCanvasImageCloseBtn.classList.add("btn", "btn-sm");
                        singleCanvasImageCloseBtn.onclick = function() { 
                            removeSingleCanvas(this) 
                        };
                        singleCanvasImageCloseBtn.appendChild(singleCanvasImageCloseBtnText);
                        singleCanvasImageContainer.appendChild(singleCanvasImageCloseBtn);
                        // Image Canvas
                        var canvas = document.createElement('canvas');
                        canvas.id = 'imageCanvas'+index;
                        canvas.className = 'imageCanvas singleImageCanvas';
                        canvas.width = e.currentTarget.width;
                        canvas.height = e.currentTarget.height;
                        canvas.onclick = function() { cropInit(canvas.id); };
                        singleCanvasImageContainer.appendChild(canvas)
                        // Canvas Context
                        var ctx = canvas.getContext('2d');
                        ctx.drawImage(e.currentTarget,0,0);
                        // galleryImagesContainer.append(canvas);
                        galleryImagesContainer.appendChild(singleCanvasImageContainer);
                        // while (document.querySelectorAll('.singleImageCanvas').length == input.files.length) {
                        //     var allCanvasImages = document.querySelectorAll('.singleImageCanvas')[0].getAttribute('id');
                        //     console.log(allCanvasImages);
                        //     //commented by sam
                        //     //cropInit(allCanvasImages);
                        //     break;
                        // };
                        urlConversion();
                        index++;
                };
                    img[i].src = blobUrl;
                    i++;
                }
                reader.readAsDataURL(singleFile);
            }
        }
    }

    imageCropFileInput.addEventListener("change", function(event){
        
        $('#cropperModal').modal('show');
        var mediaValidation = validatePostMedia(event.target.files);
        if(!mediaValidation){
            var $el = $('#file');
            $el.wrap('<form>').closest('form').get(0).reset();
            $el.unwrap();
            return false;
        }

        $('#mediaPreview').empty();
        $('.singleImageCanvasContainer').remove();
        if(cropperImageInitCanvas.cropper){
            cropperImageInitCanvas.cropper.destroy();
            cropperImageInitCanvas.width = 0;
            cropperImageInitCanvas.height = 0;
            cropImageButton.style.display = 'none';
        }
        imagesPreview(event.target);
    });
    // Initialize Cropper
    function cropInit(selector) {
        c = document.getElementById(selector);
        
        if(cropperImageInitCanvas.cropper){
            cropperImageInitCanvas.cropper.destroy();
        }
        var allCloseButtons = document.querySelectorAll('.singleImageCanvasCloseBtn');
        for (let element of allCloseButtons) {
            element.style.display = 'block';
        }
        c.previousSibling.style.display = 'none';
        // c.id = croppedImg;
        var ctx=c.getContext('2d');
        var imgData=ctx.getImageData(0, 0, c.width, c.height);
        var image = cropperImageInitCanvas;
        image.width = c.width;
        image.height = c.height;
        var ctx = image.getContext('2d');
        ctx.putImageData(imgData,0,0);

        cropper = new Cropper(image, {
            aspectRatio: 16/9,
			viewMode: 4,
            preview: '.img-preview',
            crop: function(event) {
                cropImageButton.style.display = 'block';
            }
        });

    }
    
    function image_crop() {
        if(cropperImageInitCanvas.cropper){
            var cropcanvas = cropperImageInitCanvas.cropper.getCroppedCanvas({
                    width: 250, height: 250
                });
            // document.getElementById('cropImages').appendChild(cropcanvas);
            var ctx=cropcanvas.getContext('2d');
            var imgData=ctx.getImageData(0, 0, cropcanvas.width, cropcanvas.height);
            // var image = document.getElementById(c);
            c.width = cropcanvas.width;
            c.height = cropcanvas.height;
            var ctx = c.getContext('2d');
            ctx.putImageData(imgData,0,0);
            cropperImageInitCanvas.cropper.destroy();
            cropperImageInitCanvas.width = 0;
            cropperImageInitCanvas.height = 0;
            cropImageButton.style.display = 'none';
            var allCloseButtons = document.querySelectorAll('.singleImageCanvasCloseBtn');
            for (let element of allCloseButtons) {
                element.style.display = 'block';
            }
            urlConversion();
        } else {
            alert('Please select any Image you want to crop');
        }
    }
    cropImageButton.addEventListener("click", function(){
        image_crop();
    });
    // Image Close/Remove
    function removeSingleCanvas(selector) {
        selector.parentNode.remove();
        urlConversion();
    }
    
    function urlConversion() {
        var allImageCanvas = document.querySelectorAll('.singleImageCanvas');
        var convertedUrl = '';
        canvasLength = allImageCanvas.length;
        for (let element of allImageCanvas) {
            convertedUrl += element.toDataURL('image/jpeg');
            convertedUrl += 'img_url';
        }
        document.getElementById('post_img_data').value = convertedUrl;
    }
</script>
<script>
    function validatePostMedia(files){

        $('#imageValidate').empty();
        let err = 0;
        let ResponseTxt = '';
        if(files.length > 10){
            err += 1;
            ResponseTxt += '<p> You can select maximum 10 files. </p>';
        }
        $(files).each(function(index, file) {
            if(file.size > 1048576){
                err +=  1;
                ResponseTxt += 'File : '+file.name + ' is greater than 1MB';
            }
        });

        if(err > 0){
            $('#imageValidate').html(ResponseTxt);
            return false;
        }
        return true;
        
    }
</script>
</body>
</html>

You can crop multiple images in the bootstrap modal using cropper js. Cropper js is a third-party plugin that helps you to crop images. Here you will also get a preview of all images before uploading.

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How to crop multiple images with cropper js

Crop multiple images with preview using cropper js in Bootstrap modal

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