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add webpack demo app to show how to tree shake out only the methods in use #490
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| # Running this demo | ||
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| This demo shows how to have a tool like webpack [tree shake](https://rollupjs.org/guide/en#tree-shaking) `@esri/rest-js` and only include methods that are actually being called in its output bundle. | ||
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| Since webpack loads raw [es modules](https://www.sitepoint.com/understanding-es6-modules/), something like babel can be used to transpile more backwards compatible code. | ||
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| 1. Make sure you run `npm run bootstrap` in the root folder to setup the dependencies | ||
| 1. cd into `/demos/tree-shaking/` | ||
| 1. Run `npm run build` | ||
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| <!DOCTYPE html> | ||
| <html> | ||
| <head> | ||
| <meta charset="utf-8"> | ||
| <meta name="viewport" content="width=device-width"> | ||
| <title>shaking the tree</title> | ||
| </head> | ||
| <body> | ||
| <script src="dist/bundle.js"></script> | ||
| </body> | ||
| </html> |
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| { | ||
| "name": "@esri/arcgis-rest-webpack-demo", | ||
| "version": "1.0.0", | ||
| "private": true, | ||
| "description": "", | ||
| "scripts": { | ||
| "test": "echo \"Error: no test specified\" && exit 1", | ||
| "build": "webpack" | ||
| }, | ||
| "keywords": [], | ||
| "author": "", | ||
| "license": "Apache-2.0", | ||
| "devDependencies": { | ||
| "@babel/core": "^7.3.4", | ||
| "@babel/preset-env": "^7.3.4", | ||
| "babel-loader": "^8.0.5", | ||
| "webpack": "^4.29.6", | ||
| "webpack-cli": "^3.3.0" | ||
| }, | ||
| "dependencies": { | ||
| "@esri/arcgis-rest-request": "^1.18.0", | ||
| "@esri/arcgis-rest-items": "^1.18.0" | ||
| } | ||
| } |
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| import { searchItems } from "@esri/arcgis-rest-items"; | ||
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| let element = document.createElement('div'); | ||
| document.body.appendChild(element); | ||
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| searchItems("water") | ||
| .then(response => { | ||
| element.innerHTML = JSON.stringify(response); // false | ||
| }) | ||
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| const path = require('path'); | ||
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| module.exports = { | ||
| entry: './src/index.js', | ||
| output: { | ||
| filename: 'bundle.js', | ||
| path: path.resolve(__dirname, 'dist') | ||
| }, | ||
| mode: 'production', | ||
| optimization: { | ||
| usedExports: true | ||
| }, | ||
| module: { | ||
| rules: [ | ||
| { | ||
| test: /\.m?js$/, | ||
| exclude: /(node_modules|bower_components)/, | ||
| use: { | ||
| loader: 'babel-loader', | ||
| options: { | ||
| presets: ['@babel/preset-env'] | ||
| } | ||
| } | ||
| } | ||
| ] | ||
| } | ||
| }; |
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its not necessary to call out the location of the
tsconfig.jsonfile explicitly.