upload-js
Advanced tools
JavaScript File Upload Library
(With Integrated Cloud Storage)
Files are hosted on Upload.io: the file upload service for developers.
Install via NPM:
npm install upload-js
Or via NPM:
yarn add upload-js
Or via a <script> tag:
<script src="https://js.upload.io/upload-js/v1"></script>
<input> element — Try on CodePenTo create a working file upload button, copy this example:
<html>
<head>
<script src="https://js.upload.io/upload-js/v1"></script>
<script>
const upload = new Upload({
// Get production API keys from Upload.io
apiKey: "free"
});
const uploadFile = upload.createFileInputHandler({
onProgress: ({ bytesSent, bytesTotal }) => {
console.log(`${bytesSent / bytesTotal}% complete`)
},
onUploaded: ({ fileUrl, fileId }) => {
alert(`File uploaded!\n${fileUrl}`);
},
onError: (error) => {
alert(`Error!\n${error.message}`);
}
});
</script>
</head>
<body>
<input type="file" onchange="uploadFile(event)" />
</body>
</html>
File object — Try on CodePenIf you have a File object already, use the upload.uploadFile(...) method:
const { Upload } = require("upload-js");
const upload = new Upload({ apiKey: "free" });
const onFileInputChange = async event => {
const fileObject = event.target.files[0];
const { fileUrl, fileId } = await upload.uploadFile({
file: fileObject,
onProgress: ({ bytesSent, bytesTotal }) => {
console.log(`${bytesSent / bytesTotal}% complete`)
}
});
alert(`File uploaded to: ${fileUrl}`);
}
Uploader is our file & image upload widget, powered by Upload.js.
Uploader has a larger payload size (29kB) compared to Upload.js (7kB), but if you're writing a file upload UI component, it could save you time: Uploader provides things like progress bars and cancellation out-the-box.
const { Upload } = require("upload-js");
const upload = new Upload({ apiKey: "free" });
const MyUploadButton = () => {
const uploadFile = upload.createFileInputHandler({
onProgress: ({ bytesSent, bytesTotal }) => {
console.log(`${bytesSent / bytesTotal}% complete`)
},
onUploaded: ({ fileUrl, fileId }) => {
alert(`File uploaded!\n${fileUrl}`);
},
onError: (error) => {
alert(`Error!\n${error.message}`);
}
});
return <input type="file" onChange={uploadFile} />;
};
const { Upload } = require("upload-js");
const upload = new Upload({ apiKey: "free" });
angular
.module("exampleApp", [])
.controller("exampleController", $scope => {
$scope.uploadFile = upload.createFileInputHandler({
onProgress: ({ bytesSent, bytesTotal }) => {
console.log(`${bytesSent / bytesTotal}% complete`)
},
onUploaded: ({ fileUrl, fileId }) => {
alert(`File uploaded!\n${fileUrl}`);
},
onError: (error) => {
alert(`Error!\n${error.message}`);
}
});
})
.directive("onChange", () => ({
link: (scope, element, attrs) => {
element.on("change", scope.$eval(attrs.onChange));
}
}));
const { Upload } = require("upload-js");
const upload = new Upload({ apiKey: "free" });
const uploadFile = upload.createFileInputHandler({
onProgress: ({ bytesSent, bytesTotal }) => {
console.log(`${bytesSent / bytesTotal}% complete`)
},
onUploaded: ({ fileUrl, fileId }) => {
alert(`File uploaded!\n${fileUrl}`);
},
onError: (error) => {
alert(`Error!\n${error.message}`);
}
});
const vueApp = new Vue({
el: "#example",
methods: { uploadFile }
});
<html>
<head>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script src="https://js.upload.io/upload-js/v1"></script>
<script>
const upload = new Upload({
// Get production API keys from Upload.io
apiKey: "free"
});
$(() => {
$("#file-input").change(
upload.createFileInputHandler({
onBegin: () => {
$("#file-input").hide()
},
onProgress: ({ bytesSent, bytesTotal }) => {
const progress = Math.round(bytesSent / bytesTotal * 100)
$("#title").html(`File uploading... ${progress}%`)
},
onError: (error) => {
$("#title").html(`Error:<br/><br/>${error.message}`)
},
onUploaded: ({ fileUrl, fileId }) => {
$("#title").html(`
File uploaded:
<br/>
<br/>
<a href="${fileUrl}" target="_blank">${fileUrl}</a>`
)
}
})
)
})
</script>
</head>
<body>
<h1 id="title">Please select a file...</h1>
<input type="file" id="file-input" />
</body>
</html>
Please refer to the CodePen example (link above).
Overview of the code:
Upload once in your app (at the start).createFileInputHandler once for each file <input> element.onProgress to display the upload progress for each input element.onUploaded fires, record the fileUrl from the callback's argument to a local variable.onUploaded has fired for all files, the form is ready to be submitted.Note: file uploads will safely run in parallel, despite using the same Upload instance.
By default, the browser will attempt to render uploaded files:
https://upcdn.io/W142hJkHhVSQ5ZQ5bfqvanQ
To force a file to download, add ?download=true to the file's URL:
https://upcdn.io/W142hJkHhVSQ5ZQ5bfqvanQ?download=true
Given an uploaded image URL:
https://upcdn.io/W142hJkHhVSQ5ZQ5bfqvanQ
Resize with:
https://upcdn.io/W142hJkHhVSQ5ZQ5bfqvanQ/thumbnail
Auto-crop with:
https://upcdn.io/W142hJkHhVSQ5ZQ5bfqvanQ/thumbnail-square
Tip: to create more transformations, please register an account.
To crop images using manually-provided geometry:
<html>
<head>
<script src="https://js.upload.io/upload-js/v1"></script>
<script>
const upload = new Upload({
// Get production API keys from Upload.io
apiKey: "free"
});
// Step 1: Upload the original file.
const onOriginalImageUploaded = ({ fileId, fileUrl: originalImageUrl }) => {
// Step 2: Configure crop geometry.
const crop = {
// Type Def: https://github.com/upload-js/upload-image-plugin/blob/main/src/types/ParamsFromFile.ts
input: fileId,
pipeline: {
steps: [
{
geometry: {
// Prompt your user for these dimensions...
offset: {
x: 20,
y: 40
},
size: {
// ...and these too...
width: 200,
height: 100,
type: "widthxheight!"
}
},
type: "crop"
}
]
}
}
// Step 3: Upload the crop geometry.
const blob = new Blob([JSON.stringify(crop)], {type: "application/json"});
upload
.uploadFile({
file: {
name: `${fileId}_cropped.json`, // Can be anything.
type: blob.type,
size: blob.size,
slice: (start, end) => blob.slice(start, end)
}
})
.then(
({ fileUrl: cropGeometryUrl }) => {
// Step 4: Done! Here's the cropped image's URL:
alert(`Cropped image:\n${cropGeometryUrl}/thumbnail`)
},
e => console.error(e)
);
};
const uploadFile = upload.createFileInputHandler({
onUploaded: onOriginalImageUploaded
});
</script>
</head>
<body>
<input type="file" onchange="uploadFile(event)" />
</body>
</html>
Upload.js is the JavaScript client library for Upload.io: the file upload service for developers.
Core features:
"free" API key.)Available with an account:
"free" API key provides temporary storage only.)"free" API key allows 100 uploads per day per IP.)If you would like to contribute to Upload.js:
FAQs
File Upload Library — Upload.js gives developers AJAX multipart file uploading via XHR 🚀 Comes with Cloud Storage 🌐
The npm package upload-js receives a total of 7,542 weekly downloads. As such, upload-js popularity was classified as popular.
We found that upload-js demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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