Reference: FileReader.readAsDataURL
Considering the following example:
function previewFile(file) {
var reader = new FileReader();
reader.onlo
The suggested edit queue is full for @tibor-udvari's excellent fetch answer, so I'll post my suggested edits as a new answer.
This function gets the content type from the header if returned, otherwise falls back on a settable default type.
async function getFileFromUrl(url, name, defaultType = 'image/jpeg'){
const response = await fetch(url);
const data = await response.blob();
return new File([data], name, {
type: response.headers.get('content-type') || defaultType,
});
}
// `await` can only be used in an async body, but showing it here for simplicity.
const file = await getFileFromUrl('https://example.com/image.jpg', 'example.jpg');
Expanding on Felix Turner s response, here is how I would use this approach with the fetch
API.
async function createFile(){
let response = await fetch('http://127.0.0.1:8080/test.jpg');
let data = await response.blob();
let metadata = {
type: 'image/jpeg'
};
let file = new File([data], "test.jpg", metadata);
// ... do something with the file or return it
}
createFile();