javascript change IFormFile to base64string
// Be aware! We are handling only the first <input type="file" /> element // To avoid errors, it should be placed before this piece of code var input = document.querySelector('input[type=file]'); // You will receive the Base64 value every time a user selects a file from his device // As an example I selected a one-pixel red dot GIF file from my computer input.onchange = function () { var file = input.files[0], reader = new FileReader(); reader.onloadend = function () { // Since it contains the Data URI, we should remove the prefix and keep only Base64 string var b64 = reader.result.replace(/^data:.+;base64,/, ''); console.log(b64); //-> "R0lGODdhAQABAPAAAP8AAAAAACwAAAAAAQABAAACAkQBADs=" }; reader.readAsDataURL(file); };
Source: base64.guru