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    File Uploader

    Custom Drop Zone

    The FileUploader component supports the drag-and-drop functionality to upload files.

    In this demo, the dropZone property specifies the HTML element in which you can drag and drop files for upload. The dropZoneEnter and dropZoneLeave events allow you to customize the drop zone when the mouse pointer enters and leaves this zone while dragging the file.

    NOTE
    Allowed file extensions: .jpg, .jpeg, .gif, .png
    Maximum file size: 4 MB

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    $(function(){ $("#file-uploader").dxFileUploader({ dialogTrigger: "#dropzone-external", dropZone: "#dropzone-external", multiple: false, allowedFileExtensions: [".jpg", ".jpeg", ".gif", ".png"], uploadMode: "instantly", uploadUrl: "https://js.devexpress.com/Demos/NetCore/FileUploader/Upload", visible: false, onDropZoneEnter: function(e) { if(e.dropZoneElement.id === "dropzone-external") toggleDropZoneActive(e.dropZoneElement, true); }, onDropZoneLeave: function(e) { if(e.dropZoneElement.id === "dropzone-external") toggleDropZoneActive(e.dropZoneElement, false); }, onUploaded: function(e) { const file = e.file; const dropZoneText = document.getElementById("dropzone-text"); const fileReader = new FileReader(); fileReader.onload = function() { toggleDropZoneActive(document.getElementById("dropzone-external"), false); const dropZoneImage = document.getElementById("dropzone-image"); dropZoneImage.src = fileReader.result; } fileReader.readAsDataURL(file); dropZoneText.style.display = "none"; uploadProgressBar.option({ visible: false, value: 0 }); }, onProgress: function(e) { uploadProgressBar.option("value", e.bytesLoaded / e.bytesTotal * 100) }, onUploadStarted: function() { toggleImageVisible(false); uploadProgressBar.option("visible", true); } }); var uploadProgressBar = $("#upload-progress").dxProgressBar({ min: 0, max: 100, width: "30%", showStatus: false, visible: false }).dxProgressBar("instance"); function toggleDropZoneActive(dropZone, isActive) { if(isActive) { dropZone.classList.add("dx-theme-accent-as-border-color"); dropZone.classList.remove("dx-theme-border-color"); dropZone.classList.add("dropzone-active"); } else { dropZone.classList.remove("dx-theme-accent-as-border-color"); dropZone.classList.add("dx-theme-border-color"); dropZone.classList.remove("dropzone-active"); } } function toggleImageVisible(visible) { const dropZoneImage = document.getElementById("dropzone-image"); dropZoneImage.hidden = !visible; } document.getElementById("dropzone-image").onload = function() { toggleImageVisible(true); }; });
    <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.5/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.1.5/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/21.1.5/js/dx.all.js"></script> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="index.js"></script> </head> <body class="dx-viewport"> <div class="demo-container"> <div class="widget-container flex-box"> <span>Profile Picture</span> <div id="dropzone-external" class="flex-box dx-theme-border-color"> <img id="dropzone-image" src="#" hidden alt="" /> <div id="dropzone-text" class="flex-box"> <span>Drag & Drop the desired file</span> <span>…or click to browse for a file instead.</span> </div> <div id="upload-progress"></div> </div> <div id="file-uploader"></div> </div> </div> </body> </html>
    #dropzone-external { width: 350px; height: 350px; background-color: rgba(183, 183, 183, 0.1); border-width: 2px; border-style: dashed; padding: 10px; } #dropzone-external > * { pointer-events: none; } #dropzone-external.dropzone-active { border-style: solid; } .widget-container > span { font-size: 22px; font-weight: bold; margin-bottom: 16px; } #dropzone-image { max-width: 100%; max-height: 100%; } #dropzone-text > span { font-weight: 100; opacity: 0.5; } #upload-progress { display: flex; margin-top: 10px; } .flex-box { display: flex; flex-direction: column; justify-content: center; align-items: center; }