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<!DOCTYPE html> <html> <head> <script type="text/javascript" src="https://code.jquery.com/jquery-latest.min.js"></script> <title>HTML, CSS and JavaScript demo</title> </head> <body> <img id="image" src="https://cdn.pixabay.com/photo/2018/01/20/14/26/skyscraper-3094696_150.jpg"> <button>Convert img to File</button> <p>Data Result OR show in chrome console: </p> <div id="res"> </div> </body> </html>
.lw { font-size: 60px; }
// handle click and add class $("button").on("click", () => { var file = imgToFile(document.getElementById('image')); console.log(file); }) function imgToFile (imageElement){ imageElement.crossOrigin="anonymous"; var canvasElement = document.createElement("canvas"); canvasElement.width = imageElement.width; canvasElement.height = imageElement.height; var canvasContext = canvasElement.getContext("2d"); canvasContext.drawImage(imageElement, 0, 0); var imageData = canvasContext.getImageData(0, 0, imageElement.width, imageElement.height).data; var buffer = new Uint8Array(imageData.length); for(var index = 0; index < imageData.length; index++) buffer[index] = imageData[index]; // print buffer console.log(buffer); for(var i = 0; i < buffer.length; i++){ $("#res").append(" " + buffer[i]); } var imageBlob = new Blob(buffer); return new File([imageBlob], /\/([^/]+)$/.exec(imageElement.src)[1]); }