Question 1

How to set up Flow.js with a Node.js backend?

Accepted Answer

Flow.js includes a sample in the 'samples/Node.js' folder. You need to handle POST requests with chunk parameters (like flowChunkNumber) and reassemble files server-side, often using middleware like multer or custom logic for chunk storage and merging.

Question 2

Flow.js vs resumable.js: which is better?

Accepted Answer

Flow.js evolved from resumable.js and adds features like folder drag-and-drop, upload speed estimation, and more comprehensive testing. For new projects, Flow.js is preferable due to active maintenance and enhanced reliability features.

Question 3

Can Flow.js resume uploads after a browser crash?

Accepted Answer

Yes, with the testChunks option enabled, Flow.js uses GET requests to check server-side chunk status, allowing uploads to resume seamlessly after crashes or even across different browser sessions.

Question 4

What browsers does Flow.js support?

Accepted Answer

Flow.js supports browsers with HTML5 File API: Firefox 4+, Chrome 11+, Safari 6+, and Internet Explorer 10+. Always check the README for specific versions and implement fallbacks for unsupported browsers.

Question 5

How to customize the chunk size in Flow.js?

Accepted Answer

Set the chunkSize option when initializing Flow, either as a fixed value (e.g., 1MB) or a function. For example, new Flow({chunkSize: 1024*1024}) configures 1MB chunks, with options to force uniform sizes or prioritize first/last chunks.

Question 6

Does Flow.js work with modern frameworks like React?

Accepted Answer

Flow.js is framework-agnostic; you can integrate it with React by wrapping it in components and handling events (e.g., fileAdded, progress). For Angular, there's a dedicated ng-flow extension, but React requires custom implementation.

flow.js

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