Vercel deploy environment variables All In One

Vercel deploy environment variables All In One

.env file vs ENV_API_KEY variables

docs

1. Environment Variables / 环境变量

To declare an Environment Variable for your deployment, go to the Environment Variables page of your Project Settings.

Enter the desired Name for your Environment Variable. For example, if you are using Node.js and you create an Environment Variable named API_KEY, it will be available under process.env.API_KEY in your code.

// Node.js
process.env.API_KEY;

https://vercel.com/docs/concepts/projects/environment-variables

2. Environments / 环境

对于每个环境变量，您可以选择一个或多个环境以将变量应用于

https://vercel.com/docs/concepts/projects/environment-variables#environments

3. Integration Environment Variables / 集成环境变量

https://vercel.com/integrations/mongodbatlas

https://vercel.com/docs/concepts/projects/environment-variables#integration-environment-variables

4. Reserved Environment Variables / 保留的环境变量

https://vercel.com/docs/concepts/projects/environment-variables#reserved-environment-variables

5. System Environment Variables / 系统环境变量

Automatically exposing System Environment Variables in the Project Settings.
在项目设置中自动公开系统环境变量。

Frameworks typically use a prefix in order to expose Environment Variables to the browser.
框架通常使用前缀来向浏览器公开环境变量。

Next.js
Nuxt.js
Create React App
Gatsby.js
Astro
SolidStart
Vue.js
RedwoodJS
Vite
Sanity

https://vercel.com/docs/concepts/projects/environment-variables#system-environment-variables

vercel env

https://vercel.com/docs/cli/env

https://www.npmjs.com/package/vercel

Q & A

FQA

Accessing Environment Variables
访问环境变量

process.env.CLIENT_ID & process.env.CLIENT_SECRET

import fetch from 'node-fetch';

export default async function handler(request, response) {
  const res = await fetch('https://...', {
    method: 'POST',
    body: JSON.stringify({
      client_id: process.env.CLIENT_ID,
      client_secret: process.env.CLIENT_SECRET,
    }),
    headers: { 'Content-Type': 'application/json' },
  });

  const data = await res.json();
  return response.status(200).json({ data });
}

Some frontend frameworks like Next.js require environment variable access on client side to be explicitly defined through the NEXT_PUBLIC_ prefix.

https://vercel.com/guides/how-to-add-vercel-environment-variables

https://vercel.com/guides/set-up-a-staging-environment-on-vercel

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demos

https://github.com/xgqfrms/chatgpt

custom domain

refs

https://vercel.com/web-full-stack

https://vercel.com/web-full-stack/nextjs-ssr

https://github.com/web-full-stack/nextjs-ssr/tree/main

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