first commit

rwieruch · rwieruch · commit e4b0e853884c · 2019-12-05T17:15:38.000+08:00
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,23 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
diff --git a/.prettierrc b/.prettierrc
@@ -0,0 +1,6 @@
+{
+  "semi": true,
+  "trailingComma": "es5",
+  "singleQuote": true,
+  "printWidth": 70
+}
diff --git a/.travis.yml b/.travis.yml
@@ -0,0 +1,10 @@
+language: node_js
+
+node_js:
+  - stable
+
+install:
+  - npm install
+
+script:
+  - npm test
diff --git a/README.md b/README.md
@@ -0,0 +1,15 @@
+# react-range
+
+[![Build Status](https://travis-ci.org/the-road-to-learn-react/react-range.svg?branch=master)](https://travis-ci.org/the-road-to-learn-react/react-range) [![Slack](https://slack-the-road-to-learn-react.wieruch.com/badge.svg)](https://slack-the-road-to-learn-react.wieruch.com/) [![Greenkeeper badge](https://badges.greenkeeper.io/the-road-to-learn-react/react-range.svg)](https://greenkeeper.io/)
+
+Showcasing how a React Range Component could be implemented in React. [Read more about it.](https://www.robinwieruch.de/react-range/)
+
+[![Edit react-range](https://codesandbox.io/static/img/play-codesandbox.svg)](https://codesandbox.io/s/github/the-road-to-learn-react/react-range/tree/master/?fontsize=14)
+
+## Installation
+
+- `git clone git@github.com:the-road-to-learn-react/react-range.git`
+- cd react-range
+- npm install
+- npm start
+- visit `http://localhost:3000`
diff --git a/package-lock.json b/package-lock.json
diff --git a/package.json b/package.json
@@ -0,0 +1,32 @@
+{
+  "name": "react-slider",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "react": "^16.12.0",
+    "react-dom": "^16.12.0",
+    "react-scripts": "3.2.0",
+    "styled-components": "^4.4.1"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": "react-app"
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
+}
diff --git a/public/favicon.ico b/public/favicon.ico
diff --git a/public/index.html b/public/index.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#000000" />
+    <meta
+      name="description"
+      content="Web site created using create-react-app"
+    />
+    <link rel="apple-touch-icon" href="logo192.png" />
+    <!--
+      manifest.json provides metadata used when your web app is installed on a
+      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>React App</title>
+  </head>
+  <body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start` or `yarn start`.
+      To create a production bundle, use `npm run build` or `yarn build`.
+    -->
+  </body>
+</html>
diff --git a/public/logo192.png b/public/logo192.png
diff --git a/public/logo512.png b/public/logo512.png
diff --git a/public/manifest.json b/public/manifest.json
@@ -0,0 +1,25 @@
+{
+  "short_name": "React App",
+  "name": "Create React App Sample",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    },
+    {
+      "src": "logo192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "logo512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    }
+  ],
+  "start_url": ".",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}
diff --git a/public/robots.txt b/public/robots.txt
@@ -0,0 +1,2 @@
+# https://www.robotstxt.org/robotstxt.html
+User-agent: *
diff --git a/src/App.js b/src/App.js
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+import React from 'react';
+import styled from 'styled-components';
+
+const RangeHeader = styled.div`
+  display: flex;
+  justify-content: flex-end;
+`;
+
+const StyledRange = styled.div`
+  border-radius: 3px;
+  background: #dddddd;
+  margin: 5px;
+  height: 15px;
+`;
+
+const StyledThumb = styled.div`
+  width: 10px;
+  height: 25px;
+  border-radius: 3px;
+  position: relative;
+  top: -5px;
+  opacity: 0.5;
+  background: #823eb7;
+  cursor: pointer;
+`;
+
+const getPercentage = (current, max) => (100 * current) / max;
+
+const getValue = (percentage, max) => (max / 100) * percentage;
+
+const getLeft = percentage => `calc(${percentage}% - 5px)`;
+
+const Range = ({
+  initial,
+  max,
+  formatFn = number => number.toFixed(0),
+  onChange,
+}) => {
+  const initialPercentage = getPercentage(initial, max);
+
+  const rangeRef = React.useRef();
+  const thumbRef = React.useRef();
+  const currentRef = React.useRef();
+
+  const diff = React.useRef();
+
+  const handleMouseMove = event => {
+    let newX =
+      event.clientX -
+      diff.current -
+      rangeRef.current.getBoundingClientRect().left;
+
+    const end =
+      rangeRef.current.offsetWidth - thumbRef.current.offsetWidth;
+
+    const start = 0;
+
+    if (newX < start) {
+      newX = 0;
+    }
+
+    if (newX > end) {
+      newX = end;
+    }
+
+    const newPercentage = getPercentage(newX, end);
+    const newValue = getValue(newPercentage, max);
+
+    thumbRef.current.style.left = getLeft(newPercentage);
+    currentRef.current.textContent = formatFn(newValue);
+
+    onChange(newValue);
+  };
+
+  const handleMouseUp = () => {
+    document.removeEventListener('mouseup', handleMouseUp);
+    document.removeEventListener('mousemove', handleMouseMove);
+  };
+
+  const handleMouseDown = event => {
+    diff.current =
+      event.clientX - thumbRef.current.getBoundingClientRect().left;
+
+    document.addEventListener('mousemove', handleMouseMove);
+    document.addEventListener('mouseup', handleMouseUp);
+  };
+
+  return (
+    <>
+      <RangeHeader>
+        <strong ref={currentRef}>{formatFn(initial)}</strong>
+        &nbsp;/&nbsp;
+        {max}
+      </RangeHeader>
+      <StyledRange ref={rangeRef}>
+        <StyledThumb
+          style={{ left: getLeft(initialPercentage) }}
+          ref={thumbRef}
+          onMouseDown={handleMouseDown}
+        />
+      </StyledRange>
+    </>
+  );
+};
+
+const App = () => (
+  <div>
+    <Range
+      initial={10}
+      max={25}
+      formatFn={number => number.toFixed(2)}
+      onChange={value => console.log(value)}
+    />
+  </div>
+);
+
+export default App;
diff --git a/src/App.test.js b/src/App.test.js
@@ -0,0 +1,9 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import App from './App';
+
+it('renders without crashing', () => {
+  const div = document.createElement('div');
+  ReactDOM.render(<App />, div);
+  ReactDOM.unmountComponentAtNode(div);
+});
diff --git a/src/index.js b/src/index.js
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+import React from 'react';
+import ReactDOM from 'react-dom';
+
+import App from './App';
+import * as serviceWorker from './serviceWorker';
+
+ReactDOM.render(<App />, document.getElementById('root'));
+
+// If you want your app to work offline and load faster, you can change
+// unregister() to register() below. Note this comes with some pitfalls.
+// Learn more about service workers: https://bit.ly/CRA-PWA
+serviceWorker.unregister();
diff --git a/src/serviceWorker.js b/src/serviceWorker.js
