#61 suspense samples

examples/06-suspense-like/.babelrc

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+{
+  "presets": [
+    [
+      "@babel/preset-env",
+      {
+        "useBuiltIns": "usage"
+      }
+    ],
+    "@babel/preset-typescript",
+    "@babel/preset-react"
+  ],
+  "plugins": [
+    "@babel/proposal-class-properties",
+    "@babel/proposal-object-rest-spread"
+  ]
+}

examples/06-suspense-like/package.json

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+{
+  "name": "06-suspense-like",
+  "version": "1.0.0",
+  "description": "React Promise Tracker sample with suspense-like component",
+  "keywords": [
+    "react",
+    "promise",
+    "tracker",
+    "hook",
+    "hooks",
+    "typescript"
+  ],
+  "author": "Javier Calzado (javi.calzado@lemoncode.net)",
+  "license": "MIT",
+  "main": "src/index.tsx",
+  "scripts": {
+    "start": "webpack-dev-server  --mode development --inline --hot --open",
+    "typecheck": "tsc --pretty --noEmit",
+    "build": "npm run typecheck && webpack  --mode development"
+  },
+  "dependencies": {
+    "@babel/polyfill": "^7.2.5",
+    "@material-ui/core": "3.9.3",
+    "react": "16.8.4",
+    "react-dom": "16.8.4",
+    "react-promise-tracker": "2.0.2"
+  },
+  "devDependencies": {
+    "@babel/cli": "^7.2.3",
+    "@babel/core": "^7.2.2",
+    "@babel/plugin-proposal-class-properties": "^7.1.0",
+    "@babel/plugin-proposal-object-rest-spread": "^7.0.0",
+    "@babel/preset-env": "^7.3.1",
+    "@babel/preset-react": "^7.0.0",
+    "@babel/preset-typescript": "^7.3.3",
+    "@types/node": "11.13.4",
+    "@types/react": "16.8.8",
+    "@types/react-dom": "16.8.2",
+    "babel-loader": "^8.0.6",
+    "core-js": "^2.6.5",
+    "html-webpack-plugin": "^3.2.0",
+    "tslint": "^5.16.0",
+    "tslint-react": "^4.0.0",
+    "typescript": "^3.4.5",
+    "webpack": "^4.29.3",
+    "webpack-cli": "^3.2.3",
+    "webpack-dev-server": "^3.1.14"
+  }
+}

examples/06-suspense-like/src/api.ts

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+const fetchWithDelay = (url: string, delay: number): Promise<Response> =>
+  new Promise(resolve => setTimeout(() => resolve(fetch(url, { method: "GET" })), delay));
+
+export interface Quote {
+  body: string;
+  author: string;
+}
+
+export const getQuote = () =>
+  fetchWithDelay("https://favqs.com/api/qotd", Math.random() * 3000)
+    .then(result => result.json())
+    .then<{ quote: Quote }>(result => result.quote);
+
+const arrayBufferToBase64 = buffer => {
+  let binary = "";
+  const bytes = [].slice.call(new Uint8Array(buffer));
+  bytes.forEach(b => (binary += String.fromCharCode(b)));
+  return window.btoa(binary);
+};
+
+export const getPicture = (width: number, height: number) =>
+  fetchWithDelay(`https://picsum.photos/${width}/${height}`, Math.random() * 3000).then(res =>
+    res.arrayBuffer().then(buffer => "data:image/jpeg;base64," + arrayBufferToBase64(buffer))
+  );

examples/06-suspense-like/src/app.tsx

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+import * as React from "react";
+import CircularProgress from "@material-ui/core/CircularProgress";
+import Typography from "@material-ui/core/Typography";
+import Button from "@material-ui/core/Button";
+import { WithStyles, withStyles } from "@material-ui/core/styles";
+import { trackPromise, usePromiseTracker } from "react-promise-tracker";
+import { Quote, getQuote, getPicture } from "./api";
+import { styles } from "./styles";
+
+
+const Suspense: React.FC<{ tag: string, className?: string }> = ({ tag, className, children }) => {
+  const { promiseInProgress } = usePromiseTracker({ area: tag });
+  return promiseInProgress ? <CircularProgress className={className} size={60}/> : <>{children}</>;
+};
+
+const AppInner: React.FC<WithStyles<typeof styles>> = ({classes}) => {
+  const [quote, setQuote] = React.useState<Quote>({ body: "", author: "" });
+  const [picture, setPicture] = React.useState();
+  const loadData = React.useCallback(() => {
+    trackPromise(getQuote(), "quote").then(setQuote);
+    trackPromise(getPicture(500, 200), "picture").then(setPicture);
+  }, []);
+
+  React.useEffect(() => loadData(), []);
+
+  return (
+    <div className={classes.container}>
+      <Button variant="outlined" onClick={loadData} className={classes.button}>Refresh</Button>
+      <Suspense tag="picture" className={classes.progress}>
+        <img src={picture} className={classes.pic}/>
+      </Suspense>
+      <Suspense tag="quote" className={classes.progress}>
+        <Typography variant="h4" align="center" className={classes.text}>{quote.body}</Typography>
+        <Typography variant="h5" className={classes.text}>{quote.author}</Typography>
+      </Suspense>
+    </div>
+  );
+};
+
+export const App = withStyles(styles)(AppInner);

examples/06-suspense-like/src/index.html

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+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+	<meta charset="utf-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+	<title>React Promise Tracker - Suspense</title>
+</head>
+
+<body>
+	<div id="root"></div>
+</body>
+
+</html>

examples/06-suspense-like/src/index.tsx

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+import * as React from "react";
+import * as ReactDOM from "react-dom";
+import CssBaseline from "@material-ui/core/CssBaseline";
+import { App } from "./app";
+
+ReactDOM.render(
+  <>
+    <CssBaseline />
+    <App />
+  </>,
+  document.getElementById("root")
+);

examples/06-suspense-like/src/styles.ts

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+import { createStyles } from "@material-ui/core/styles";
+
+export const styles = () => createStyles({
+  progress: {
+    margin: "1rem",
+  },
+  container: {
+    display: "flex",
+    flexDirection: "column",
+    alignItems: "center",
+    padding: "2rem",
+  },
+  button: {
+    marginBottom: "2rem",
+  },
+  pic: {
+    marginBottom: "1.25rem",
+    borderRadius: "8px",
+  },
+  text: {
+    marginBottom: "0.75rem",
+  }
+});
+
+

examples/06-suspense-like/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "es6",
+    "module": "es6",
+    "moduleResolution": "node",
+    "declaration": false,
+    "noImplicitAny": false,
+    "jsx": "react",
+    "sourceMap": true,
+    "noLib": false,
+    "suppressImplicitAnyIndexErrors": true,
+    "allowSyntheticDefaultImports": true,
+  },
+  "compileOnSave": false,
+  "exclude": ["node_modules"]
+}

examples/06-suspense-like/tslint.json

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+{
+  "extends": ["tslint:recommended", "tslint-react", "tslint-config-prettier"],
+  "defaultSeverity": "warning",
+  "rules": {
+    "align": [true, "parameters", "statements"],
+    "array-type": false,
+    "arrow-parens": false,
+    "class-name": true,
+    "comment-format": [true, "check-space"],
+    "curly": false,
+    "eofline": true,
+    "forin": false,
+    "import-spacing": true,
+    "indent": [true, "spaces"],
+    "interface-name": [true, "never-prefix"],
+    "jsdoc-format": true,
+    "jsx-no-lambda": false,
+    "jsx-no-multiline-js": false,
+    "label-position": true,
+    "max-line-length": [true, 120],
+    "member-ordering": false,
+    "member-access": false,
+    "no-any": false,
+    "no-arg": true,
+    "no-bitwise": true,
+    "no-console": false,
+    "no-consecutive-blank-lines": [true, 2],
+    "no-construct": true,
+    "no-debugger": true,
+    "no-default-export": false,
+    "no-duplicate-variable": true,
+    "no-empty": true,
+    "no-empty-interface": false,
+    "no-eval": true,
+    "no-implicit-dependencies": false,
+    "no-internal-module": true,
+    "no-object-literal-type-assertion": false,
+    "no-shadowed-variable": true,
+    "no-string-literal": false,
+    "no-submodule-imports": false,
+    "no-trailing-whitespace": true,
+    "no-unsafe-finally": true,
+    "no-unused-expression": true,
+    "no-var-keyword": true,
+    "no-var-requires": false,
+    "object-literal-key-quotes": [true, "as-needed"],
+    "object-literal-sort-keys": false,
+    "one-line": [true, "check-catch", "check-else", "check-open-brace", "check-whitespace"],
+    "only-arrow-functions": false,
+    "ordered-imports": false,
+    "quotemark": [true, "double", "jsx-double"],
+    "radix": false,
+    "semicolon": [true, "always", "strict-bound-class-methods"],
+    "trailing-comma": [
+      true,
+      {
+        "multiline": {
+          "objects": "always",
+          "arrays": "always",
+          "imports": "always",
+          "exports": "always",
+          "typeLiterals": "always"
+        },
+        "singleline": "never",
+        "esSpecCompliant": true
+      }
+    ],
+    "triple-equals": [true, "allow-null-check"],
+    "typedef": [true, "parameter", "property-declaration"],
+    "typedef-whitespace": [
+      true,
+      {
+        "call-signature": "nospace",
+        "index-signature": "nospace",
+        "parameter": "nospace",
+        "property-declaration": "nospace",
+        "variable-declaration": "nospace"
+      }
+    ],
+    "variable-name": [true, "ban-keywords", "check-format", "allow-leading-underscore", "allow-pascal-case"],
+    "whitespace": [
+      true,
+      "check-branch",
+      "check-decl",
+      "check-module",
+      "check-operator",
+      "check-separator",
+      "check-type",
+      "check-typecast"
+    ]
+  }
+}

examples/06-suspense-like/webpack.config.js

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+const HtmlWebpackPlugin = require("html-webpack-plugin");
+const path = require("path");
+
+const basePath = __dirname;
+
+module.exports = {
+  context: path.join(basePath, "src"),
+  resolve: {
+    extensions: [".js", ".ts", ".tsx"],
+  },
+  entry: ["./index.tsx"],
+  output: {
+    path: path.join(basePath, "dist"),
+    filename: "bundle.js"
+  },
+  devtool: "source-map",
+  devServer: {
+    contentBase: "./dist", // Content base
+    inline: true, // Enable watch and live reload
+    host: "localhost",
+    port: 8080,
+    stats: "errors-only"
+  },
+  module: {
+    rules: [
+      {
+        test: /\.(tsx?)|(js)$/,
+        exclude: /node_modules/,
+        loader: "babel-loader",
+      },
+    ]
+  },
+  plugins: [
+    //Generate index.html in /dist => https://github.com/ampedandwired/html-webpack-plugin
+    new HtmlWebpackPlugin({
+      filename: "index.html", //Name of file in ./dist/
+      template: "index.html", //Name of template in ./src
+      hash: true
+    })
+  ]
+};

examples/07-suspense-custom/.babelrc

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+{
+  "presets": [
+    [
+      "@babel/preset-env",
+      {
+        "useBuiltIns": "usage"
+      }
+    ],
+    "@babel/preset-typescript",
+    "@babel/preset-react"
+  ],
+  "plugins": [
+    "@babel/proposal-class-properties",
+    "@babel/proposal-object-rest-spread"
+  ]
+}