The environment variables are embedded during the build time. Since Create React App produces a static HTML/CSS/JS bundle, it can’t possibly read them at runtime. To read them at runtime, you would need to load HTML into memory on the server and replace placeholders in runtime, asdescri...
test, production). This lesson explores how to use environment variables specifically with Create React App, starting with the built inNODE_ENVvariable, as well as how to create custom environment variables for your app.
# Generate React App create-react-app react-nginx-variablecd react-nginx-variable# Create default environment variables that we want to usetouch.envecho"API_URL=https//default.dev.api.com">> .env 创建脚本env.sh #!/bin/bash # Recreate configfilerm-rf ./env-config.jstouch./env-config.js ...
test, production). This lesson explores how to use environment variables specifically with Create React App, starting with the built inNODE_ENVvariable, as well as how to create custom environment variables for your app.
Create React Apphas support for custom environment variables baked into the build system. To set a custom environment variable, simply set it while starting the Create React App build process. Copy$ REACT_APP_TEST_VAR=123 npm start HereREACT_APP_TEST_VARis the custom environment variable and we...
How to gracefully use Environment Variables in a React, Install react-native-dotenv Next, install the dependency react-native-dotenv that will help you manage your environment variables gracefully throughout this app. Go to the terminal window, and execute the following command. yarn add react-nati...
3.1.1 方法一:Create React App 官方给出的解决方案 在项目根目录(与package.json文件同级)创建ref="https://links.jianshu.com/go?to=https%3A%2F%2Fcreate-react-app.dev%2Fdocs%2Fadding-custom-environment-variables%2F%23adding-development-environment-variables-in-env">.env 文件,添加EXTEND_ESLINT 环...
Note: the URL may be different if you've made adjustments via theHOST or PORT environment variables. Start your app by runningnpm start, and start debugging in VS Code by pressingF5or by clicking the green debug icon. You can now write code, set breakpoints, make changes to the code, ...
create-react-app是一个react的cli脚手架+构建器,我们可以基于CRA零配置直接上手开发一个react的SPA应用。 通过3种方式快速创建一个React SPA应用: npm init with initializer (npm 6.1+) npx with generator (npm 5.2+) yarn create with initializer (yarn 0.25+) 例如我们新建一个叫my-app的SPA: 代码语言...
// Ensure environment variables are read.require('../config/env'); 还有一些预检查,这部分是作为eject之前对项目目录的检查,这里因为eject不在我们范围,直接跳过。然后进入到了我们主脚本的依赖列表: constfs=require('fs');constchalk=require('react-dev-utils/chalk');constwebpack=require('webpack');con...