I have array of image data, and trying to convert it into array of File
s
const images = [
{ img: "http://localhost/images/1.jpg", name: "1.png", mime_type: "image/jpeg" },
{ img: "http://localhost/images/2.jpg", name: "2.png", mime_type: "image/jpeg" },
]
const res: File[] = images.map(function (item) {
return new File([item.img], item.name, { type: item.mime_type })
})
This does not work 🙁 As I understand it, the converted image in base24 should be passed to the file constructor? How can I do that?
UPD:
I have a VUE component to work with images. The input component has a property of type Array. How to create an Array based on the data returned by database. Returns from the database: image link, name and type.
UPD2 answer:
let PhotosAsFile: File[] = []
const _photos = [
{ url: "http://localhost:8080/images/1.jpeg", name: "name1", mime_type: "image/jpeg" },
{ url: "http://localhost:8080/images/2.jpeg", name: "name2", mime_type: "image/jpeg" },
{ url: "http://localhost:8080/images/3.jpeg", name: "name3", mime_type: "image/jpeg" },
]
const data: Promise<File>[] = _photos.map(async function (item): Promise<File> {
const myBlob: Blob = await getBlobFromUrl(item.url)
const extensionsFile: RegExpMatchArray | null | undefined = item.url?.match(/.([^.]+)$/)
return new File([myBlob], extensionsFile && item.name ? item.name + "." + extensionsFile[1] : "image.jpeg", {
type: item.mime_type ?? "image/jpeg",
})
})
Promise.all(data).then((values: File[]): void => {
PhotosAsFile = values
})
const getBlobFromUrl = (url): Promise<Blob> => {
return new Promise((resolve, reject): void => {
const request: XMLHttpRequest = new XMLHttpRequest()
request.open("GET", url, true)
request.responseType = "blob"
request.onload = () => {
resolve(request.response)
}
request.onerror = reject
request.send()
})
}
2
Answers
Answer
To create
File
(i’m not sure why you’d ever need that), you need to pass in the binary datahttps://developer.mozilla.org/en-US/docs/Web/API/File/File
That’s a file in memory. You can’t read it from the disk. You can’t write it to the disk. You can set it as value of and send as FormData I guess.