removed chrome extension code
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Peli de Halleux
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# microbit-chrome
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Prototype chrome addon that exposes the @boardname@'s serial output to webpages.
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* watch the [demo video](https://vimeo.com/146207766)
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# Installation
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See [developer.chrome.com](https://developer.chrome.com/extensions/getstarted#unpacked)
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for instructions on how to install the local version into your chrome browser.
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# Requirements
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* Chrome 48 or later.
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# Sample page
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The `demo.html` webpage goes along with the
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https://github.com/Microsoft/microbit-touchdevelop/blob/master/examples/tcs34725.cpp
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program. Run `http-server` from this directory, then visit
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http://localhost:8080/demo.html
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(keep in mind that pages served from `file://` cannot open ports).
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# Building
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Open a command prompt and run the following commands.
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````
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npm install
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typings update
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````
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var connections = [];
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// A list of "ports", i.e. connected clients (such as web pages). Multiple web
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// pages can connect to our service: they all receive the same data.
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var ports = [];
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function byPath(path) {
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return connections.filter(function (x) { return x.path == path; });
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}
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function byId(id) {
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return connections.filter(function (x) { return x.id == id; });
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}
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function onReceive(data, id) {
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if (ports.length == 0)
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return;
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var view = new DataView(data);
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var decoder = new TextDecoder("utf-8");
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var decodedString = decoder.decode(view);
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ports.forEach(function (port) { return port.postMessage({
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type: "serial",
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data: decodedString,
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id: id
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}); });
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}
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function findNewDevices() {
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chrome.serial.getDevices(function (serialPorts) {
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serialPorts.forEach(function (serialPort) {
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if (byPath(serialPort.path).length == 0 &&
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serialPort.displayName == "mbed Serial Port") {
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try {
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chrome.serial.connect(serialPort.path, { bitrate: 115200 }, function (info) {
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// In case the [connect] operation takes more than five seconds...
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if (info && byPath(serialPort.path).length == 0)
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connections.push({
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id: info.connectionId,
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path: serialPort.path
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});
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});
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}
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catch (e) {
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console.log("failed to connect to " + serialPort.displayName);
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}
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}
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});
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});
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}
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function main() {
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// Register new clients in the [ports] global variable.
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chrome.runtime.onConnectExternal.addListener(function (port) {
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console.log('connection to port ' + port.name);
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if (/^serial$/.test(port.name)) {
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ports.push(port);
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port.onDisconnect.addListener(function () {
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ports = ports.filter(function (x) { return x != port; });
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});
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}
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});
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// When receiving data for one of the connections that we're tracking, forward
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// it to all connected clients.
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chrome.serial.onReceive.addListener(function (info) {
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if (byId(info.connectionId).length > 0)
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onReceive(info.data, info.connectionId);
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});
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// When it looks like we've been disconnected, drop the corresponding
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// connection object from the [connections] global variable.
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chrome.serial.onReceiveError.addListener(function (info) {
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if (info.error == "system_error" || info.error == "disconnected" || info.error == "device_lost")
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connections = connections.filter(function (x) { return x.id != info.connectionId; });
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});
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// Probe serial connections at regular intervals. In case we find an mbed port
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// we haven't yet connected to, connect to it.
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setInterval(findNewDevices, 5000);
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findNewDevices();
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}
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document.addEventListener("DOMContentLoaded", main);
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@ -1,103 +0,0 @@
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declare var chrome: any;
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declare class TextDecoder {
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constructor(encoding: string);
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decode(data: DataView): string;
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}
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// A list of: {
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// id: number;
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// path: string;
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// } where [id] is the [connectionId] (internal to Chrome) and [path] is the
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// OS' name for the device (e.g. "COM4").
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interface Connection {
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id: string;
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path: string;
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}
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let connections: Connection[] = [];
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// A list of "ports", i.e. connected clients (such as web pages). Multiple web
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// pages can connect to our service: they all receive the same data.
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let ports = [];
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interface Message {
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type: string;
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data: string;
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id: string;
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}
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function byPath(path: string): Connection[] {
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return connections.filter((x) => x.path == path);
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}
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function byId(id: string): Connection[] {
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return connections.filter((x) => x.id == id);
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}
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function onReceive(data: ArrayBuffer, id: string) {
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if (ports.length == 0) return;
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let view = new DataView(data);
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let decoder = new TextDecoder("utf-8");
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let decodedString = decoder.decode(view);
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ports.forEach(port => port.postMessage(<Message>{
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type: "serial",
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data: decodedString,
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id: id
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}));
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}
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function findNewDevices() {
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chrome.serial.getDevices(function (serialPorts) {
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serialPorts.forEach(function (serialPort) {
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if (byPath(serialPort.path).length == 0 &&
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serialPort.displayName == "mbed Serial Port") {
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try {
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chrome.serial.connect(serialPort.path, { bitrate: 115200 }, function (info) {
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// In case the [connect] operation takes more than five seconds...
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if (info && byPath(serialPort.path).length == 0)
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connections.push({
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id: info.connectionId,
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path: serialPort.path
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});
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});
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} catch (e) {
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console.log(`failed to connect to ${serialPort.displayName}`)
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}
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}
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});
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});
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}
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function main() {
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// Register new clients in the [ports] global variable.
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chrome.runtime.onConnectExternal.addListener(function (port) {
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console.log('connection to port ' + port.name)
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if (/^serial$/.test(port.name)) {
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ports.push(port);
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port.onDisconnect.addListener(function () {
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ports = ports.filter(function (x) { return x != port });
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});
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}
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});
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// When receiving data for one of the connections that we're tracking, forward
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// it to all connected clients.
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chrome.serial.onReceive.addListener(function (info) {
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if (byId(info.connectionId).length > 0)
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onReceive(info.data, info.connectionId);
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});
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// When it looks like we've been disconnected, drop the corresponding
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// connection object from the [connections] global variable.
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chrome.serial.onReceiveError.addListener(function (info) {
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if (info.error == "system_error" || info.error == "disconnected" || info.error == "device_lost")
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connections = connections.filter((x) => x.id != info.connectionId);
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});
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// Probe serial connections at regular intervals. In case we find an mbed port
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// we haven't yet connected to, connect to it.
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setInterval(findNewDevices, 5000);
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findNewDevices();
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}
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document.addEventListener("DOMContentLoaded", main);
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{
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"app": {
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"background": {
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"scripts": [ "background.js" ]
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}
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},
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"manifest_version": 2,
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"name": "makecode.microbit.org",
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"version": "0.8.0",
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"author": "Microsoft Corporation",
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"short_name": "makecode.microbit.org",
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"description": "Extension for https://makecode.microbit.org.",
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"offline_enabled": true,
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"icons": {
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"48": "logo48.png",
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"128": "logo128.png"
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},
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"permissions": [
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"serial",
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"usb"
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],
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"externally_connectable": {
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"matches": [ "*://localhost/*", "https://makecode.microbit.org/*", "https://*.microbit.org/*" ]
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}
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}
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{
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"compiler-options": {
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"target": "ES5",
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"module": "amd",
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"sourceMap": false
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}
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}
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