Js convert image to base64

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Js convert image to base64

Comments: 4 | Rating: 4.3 / 5 for converting images to Base64 and get the original string Base64, I recommend using one of the following methods: Of course, we can use the new Image () to paint a canvas and using the toDataURL () method to get Base64 string. But this can only be useful if you don? t need the original Base64 string, and / or type of the original image. Also keep in mind that this method can return different results for the same image, depending on the browser and operating system (you can get not only the different Base64 values, but also slightly different images). If this is your case or you don? t worry, check the example below (it is supported by most popular browsers, such as Chrome 4+, Riva 12 +, Firefox 3.6+, Internet Explorer 9+, Safari 4+). // For bypass errors (A Tainted paintings could not be exported? ? or ? ? SecurityError: The operation is insecure? ?) // The browser should load the image via unauthenticated request and following CORS headers var img = new image(); img.crossOrigin = 'Anonymous'; // The magic begins after the image is successfully loaded img.onload = function () {var canvas = document.createElement ( 'canvas'), CTX = canvas.getContext ( '2d'); canvas.height = img.naturalHeight; canvas.width = img.naturalWidth; ctx.drawImage (img, 0, 0); // Unfortunately, we are unable to keep the original image type, so all the images will be converted to PNG // For this reason, we can not get the original string var uri = Base64 canvas.toDataURL ( 'image / png' ), B64 = uri .Replace (/ ^ :. image data +; base64, /, ''); console.log (B64); // -> "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVQImWP4z8DwHwAFAAH / q842iQAAAABJRU5ErkJggg == '}; // If you upload images from a remote server, be sure to configure an Access-Control-Allow-originates // For example, the following image can be loaded from any location. var url = '//static.base64.guru/uploads/images/1x1.gif'; img.src = url; A few days ago I was looking for a way to quickly put an image as a string to send in a message. I remembered that it was possible to use Base64 for this, but I do not remember the exact procedure. I had to take bits from different StackOverflow answers to make it work. I decided to write this article to save a few minutes. imgToBase64 function (img) {const linen = document.createElement ( 'canvas'); ctx = const canvas.getContext ( '2d'); canvas.width = img.width; canvas.height = img.height; // I think this will not work within the function by img.crossOrigin console = 'anonymous'; ctx.drawImage (img, 0, 0); canvas.toDataURL return (); } Let's try: Here's a nice picture of Xochimilco, in Mexico City, Mexico taken by Jeremy Lishner on Unsplash. You can follow the link if you want, but I included the image so there's no need to leave this page. Open the console (Ctrl + Shift + I). Paste the code. We will imgToBase64 available as function. Click the collection in the upper left (Ctrl + Shift + C) and select the image. Now you will have a reference to DOMElement with $ 0. Copy type (imgToBase64 ($ 0)). Now you have the image string to the clipboard, ready for pasting elsewhere. Sometimes you get a SecurityError error :. The transaction is insecure, this is related to the attribute crossOrigin, you can manually change the value of $ anonymous 0.crossOrigin = 'anonymous' and repeat step 4. Tip: you can check the image Base64 string above created by pasting in the URL of a browser tab. Like this: That's it ... I hope you find it useful. Tomasz Wegrzanowski - Ifeanyi Fredrick Okwuobi August 25 - August 16 Tomasz Wegrzanowski - August 25 readAsDataURL The method is used to The content of the blob or the specified file. When the reading operation is over, the Readystate becomes done, and the loadend is activated. At that time, the result attribute contains data as a set of data: URLs representing file data as a base-coded string64. Note: the result of the Blob cannot be decoded directly as a basic64 without first removing the URL data statement preceding the la data. To retrieve only the BASE64 encoded string, first remove the data: * / *; base64, from the result. istanceoffilereader.readasdataurl (Blob); Blob the blob or file to read. recovery (URL) .then (answer => risposta.blob ()) .then (BLOB => New promise ((resolution, rifiutazione) => {const Reader = New FileReader () Reader .onloadend = () => Resolution (Reader.Result) Reader.onerror = Reject Reader.ReaDaSDataurl (Blob)})) Todataurl ( ' ) .then (DataURL = > {.log console ( 'result', DataURL)}) These approaches have a better compression work for other file types such as browser support: FileReader http: // #feat = retrieves 2. approach: canvas load the image into an image object, paint in a canvas nontanata and convert the canvas in a dataump. todataurl function (src, callback, OutputFormat) {var img = new Image (); img.crossorigin = 'anonymous'; img.onload = function () {var canvas = document.createElement ( 'canvas'); VAR CTX = canvas.getContext ('2D'); var datauml; canvas.Height = questo.NaturalHeight; canvas.width = this.naturalwidth; ctx.drawimage (this, 0, 0); DataURL = canvas.todataurl (OutputFormat); callback (DataURL); } ;; img.src = src; if (plete plete || === undefined) {img.src = "data: image / gif; base64, r0lgodlhaqaaaaaaaaaaaaaaaaaaaaaaaquabaaacauwaaaaqabaaacauwaaaaa img.src = src;}} todataurl ( ' / avatar / d50c83cc0c6523b4d3f6523b4d3f6085295c953e0 ', function (DataURL) {console.log (' result ', datauml)}) in the detail of input formats supported: image / jpeg, image / jpeg, image / jpg, image / gif, image / bmp , image / tiff, image / icon x-icon, image / svg + xml, image / webp, image / xxx output formats supported: image / jpeg, image / jpeg, image / WebP (Chrome) browser Support: 3. approach: images from the local file system If you want to convert images from the users file system that you need to take a different approach. Use the FileReader API: encodeimageFileasurl function (element) {var = element.files files [0]; vAR Player = new FileReader (); reader.onloadend = Function () {console.log ( 'Result' , Reader.Result)} Reader.ReaDaSDataurl (file); } /> node js convert image to base64. react js convert image to base64. vue js convert image to base64. js convert image url to base64. convert image to base64 string in react js. convert uploaded image to base64 react js. react js convert image url to base64. node js convert image url to base64

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