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Photo mosaic ------------ The goal of this task is to implement the following flow in a client-side app. 1. A user selects a local image file. 2. The app loads that image, divides the image into tiles, computes the average color of each tile, fetches a tile from the server for that color, and composites the results into a photomosaic of the original image. 3. The composited photomosaic should be displayed according to the following constraints: - tiles should be rendered a complete row at a time (a user should never see a row with some completed tiles and some incomplete) - the mosaic should be rendered from the top row to the bottom row. 4. The client app should make effective use of parallelism and asynchrony. The project skeleton contains a lightweight server (written in node) for serving the client app and the tile images. To start it, run npm start. / serves mosaic.html /js/* serves static resources /color/<hex> serves an SVG mosaic tile for color <hex>. e.g., /color/0e4daa The tile size should be configurable via the code constants in js/mosaic.js. The project skeleton is already set up to include those constants in both the mosaic client and the mosaic server. The default size is 16x16. You should: - pretend you're submitting this as production-quality code for review; i.e., - write effective comments; - make the code modular; - make the code testable; - avoid using JS libraries (e.g., jQuery, Modernizr, React) as browser APIs are sufficient for the exercise and we're not testing for familiarity with any particular tools; - use HTML5 features where appropriate; - allocate about 3 hours to do the task. You may: - edit /etc/hosts; - use any HTML5 feature supported by current Chrome (e.g., Promise, Worker); - be as creative as you like with the submission UI (file input, drag & drop, etc); however, it is not the focus of the task, a minimal UI is fine. Have fun!