@zach.codes/use-upload
v1.0.1
Published
**Zero dependency, total control, file upload hook for React and Svelte with upload progress.**
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Readme
Zero dependency, total control, file upload hook for React and Svelte with upload progress.
100% Test Coverage across React + Svelte
This is a simple hook for handling file uploads across multiple frameworks. It takes the simplest approach possible so that you have full control over the upload process, while still providing lots of help vs implementing this yourself.
It has upload progress due to using XHR, and can be used for uploading files direct to Google Cloud, AWS, etc.
Install
npm install @zach.codes/use-upload
Framework Agnostic
This library supports the same api across frameworks. Currently only svelte and React have implementations.
Svelte
<script lang="ts">
import { useUpload } from "@zach.codes/use-upload/lib/svelte";
let [upload, state] = useUpload(({ files }) => ({
method: "PUT",
url: "http://localhost:5000",
body: files[0],
}));
</script>
<div>
{#if $state.done}
<div>Done uploading!</div>
{/if}
{#if $state.error}
<div>Error uploading: {$state.error}</div>
{/if}
{#if $state.loading}
<div>{$state.progress}% complete</div>
{/if}
<input
type="file"
on:change={(e) => {
if (e.currentTarget.files) upload({ files: e.currentTarget.files });
}}
/>
</div>
React
Here's a basic example of uploading a single file to a url in React. The below examples all work in Svelte as well.
import { useUpload } from "@zach.codes/use-upload/lib/react";
const MyComponent = () => {
let [upload, { progress, done, loading }] = useUpload(({ files }) => ({
method: "PUT",
url: "http://localhost:4000",
body: files[0],
}));
return (
<div>
{loading ? `${progress}% complete` : null}
<input
type="file"
onChange={(e) => {
if (e.target.files) {
upload({ files: e.target.files });
}
}}
/>
</div>
);
};
Formdata
It's up to you to pass in formdata
import { useUpload } from "@zach.codes/use-upload/lib/react";
const MyComponent = () => {
let [upload, { progress, done, loading }] = useUpload(({ files }) => {
let formData = new FormData();
files.forEach((file) => formData.append(file.name, file));
return {
method: "PUT",
url: "http://localhost:4000",
body: formData,
};
});
return (
<div>
{loading ? `${progress}% complete` : null}
<input
type="file"
onChange={(e) => {
if (e.target.files) {
upload({ files: e.target.files });
}
}}
/>
</div>
);
};
Adding headers
You can pass a custom headers object
import { useUpload } from "@zach.codes/use-upload/lib/react";
const MyComponent = () => {
let [upload, { progress, done, loading }] = useUpload(({ files }) => {
let formData = new FormData();
files.forEach((file) => formData.append(file.name, file));
return {
method: "PUT",
url: "http://localhost:4000",
body: formData,
headers: { Authorization: "test" },
};
});
return (
<div>
{loading ? `${progress}% complete` : null}
<input
type="file"
onChange={(e) => {
if (e.target.files) {
upload({ files: e.target.files });
}
}}
/>
</div>
);
};
Customizing the request
You have full access to the XHR object, so you can set withCredentials or anything else you'd like.
import { useUpload } from "@zach.codes/use-upload/lib/react";
const MyComponent = () => {
let [upload, { progress, done, loading }] = useUpload(({ files, xhr }) => {
xhr.withCredentials = true;
let formData = new FormData();
files.forEach((file) => formData.append(file.name, file));
return {
method: "PUT",
url: "http://localhost:4000",
body: formData,
headers: { Authorization: "test" },
};
});
return (
<div>
{loading ? `${progress}% complete` : null}
<input
type="file"
onChange={(e) => {
if (e.target.files) {
upload({ files: e.target.files });
}
}}
/>
</div>
);
};
Signed uploads
Signed uploads to a storage bucket on AWS or similar service, usually require this flow:
- Hit your own backend to generate a signed url
- send the file to that signed url to upload direct
- do something on your frontend after it finishes
Here's how simple it is with this hook
import { useUpload } from "@zach.codes/use-upload/lib/react";
const MyComponent = () => {
let [upload, { progress, done, loading }] = useUpload(async ({ files }) => {
// This function is your request logic for getting a url
let url = await getUploadUrl({
caseId,
fileName: files[0].name,
contentType: files[0].type,
});
// returning undefined skips the upload logic, in case your `getUploadUrl` has an error
if (!url) return;
return {
method: "PUT",
url: url,
// send a single file in the body to the storage bucket
body: files[0],
};
});
useEffect(() => {
if (done) {
//refetch the data on the page, or some other action so the user can see the upload completed
}
}, [done, refetch]);
return (
<div>
{loading ? `${progress}% complete` : null}
<input
type="file"
onChange={(e) => {
if (e.target.files) {
upload({ files: e.target.files });
}
}}
/>
</div>
);
};