create-react-app(簡稱cra)已經(jīng)更新之2.0.3版本, babel也更新至7.x版本, JavaScript裝飾器語法雖然還不是標(biāo)準(zhǔn), 但是借助于babel, 也能在項目里愉快的玩耍.
cra2.0時代如何啟用裝飾器語法呢? 我們依舊采用的是react-app-rewired, 通過劫持webpack cofig對象, 達(dá)到修改的目的.
yarn add react-app-rewired
修改package.json
"scripts": { "start": "react-app-rewired start", "build": "react-app-rewired build", "test": "react-app-rewired test" }安裝裝飾器語法所需的babel插件, 也可以順帶升級babel-core
yarn add @babel/plugin-proposal-decorators metro-react-native-babel-preset -D
在項目根目錄下創(chuàng)建.babelrc, config-overrides.js文件
// .babelrc{ "presets": ["module:metro-react-native-babel-preset"], "plugins": [ [ "@babel/plugin-proposal-decorators", { "legacy": true } ] ]}// config-overridesconst { getBabelLoader } = require('react-app-rewired');const path = require('path');module.exports = function override(config, env) { const babelLoader = getBabelLoader(config.module.rules); const pwd = path.resolve(); babelLoader.include = [path.normalize(`${pwd}/src`)]; // use babelrc babelLoader.options.babelrc = true; return config;};原理就是劫持了config對象, 對其babel規(guī)則進(jìn)行簡單的修改.
附上完整的package.json
{ "name": "my-react-project", "version": "0.1.0", "private": true, "dependencies": { "react": "^16.5.2", "react-app-rewired": "^1.6.2", "react-dom": "^16.5.2", "react-scripts": "2.0.5" }, "scripts": { "start": "react-app-rewired start", "build": "react-app-rewired build", "test": "react-app-rewired test" }, "eslintConfig": { "extends": "react-app" }, "browserslist": [ ">0.2%", "not dead", "not ie <= 11", "not op_mini all" ], "devDependencies": { "@babel/plugin-proposal-decorators": "^7.1.2", "metro-react-native-babel-preset": "^0.48.1", "webpack-bundle-analyzer": "^3.0.3" }}以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持武林網(wǎng)。
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