## Description
This PR ensures that the default prettier config is used for examples
and templates.
This config is compatible with `prettier@3` as well (upgrading prettier
is bigger change that can be a future PR).
## Changes
- Updated `.prettierrc.json` in root with `"trailingComma": "es5"` (will
be needed upgrading to prettier@3)
- Added `examples/.prettierrc.json` with default config (this will
change every example)
- Added `packages/create-next-app/templates/.prettierrc.json` with
default config (this will change every template)
## Related
- Fixes#54402
- Closes#54409
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Hi,
Fix for the accidental change, introduced in this PR
https://github.com/vercel/next.js/pull/59572, which set the `next`
version tag for the with-cypress example, to `^latest`, which causes the
`create-next-app` step to fail:
```shell
npx create-next-app --example with-cypress with-cypress-app
Creating a new Next.js app in /Users/<user>/<Project-Path>/with-cypress-app.
Downloading files for example with-cypress. This might take a moment.
Installing packages. This might take a couple of minutes.
npm ERR! code EINVALIDTAGNAME
npm ERR! Invalid tag name "^latest" of package "next@^latest": Tags may not have any characters that encodeURIComponent encodes.
```
Yarn instead, shows a list of next.js packages to select from instead.
Co-authored-by: JJ Kasper <jj@jjsweb.site>
This PR updates the testing guides to use App Router and TypeScript,
also updates `/examples` to show `app` and `pages` examples.
## Overview
- [x] Create a new "Testing" section that is shared between `app` and
`pages`.
- [x] Explain the differences between E2E, unit testing, component
testing, etc.
- [x] Recommend E2E for `async` components as currently none of the
tools support it.
- [x] Update setup guides for **Cypress**, **Playwright**, and **Jest**
with latest config options, and examples for `app` and `pages`.
- [x] Add new guide for **Vitest**
- [x] Clean up `/examples`: use TS, show `app` and `pages` examples,
match docs config
## Cypress
- [x] E2E Tests
- [x] Component Testing
- [x] Client Components
- [x] Server Components
- [ ] `async` components
**Blockers:**
- TS: `Option 'bundler' can only be used when 'module' is set to
'es2015' or later`. In **tsconfig.json** compilerOptions, Next.js uses
"moduleResolution": "bundler", changing it to "node" fixes the issue but
it can have repercussions.
- https://github.com/cypress-io/cypress/issues/27731
- Version 14 is currently not supported for component testing
- https://github.com/cypress-io/cypress/issues/28185
## Playwright
- [x] E2E Tests
## Jest
- [x] Unit Testing
- [x] Client Components
- [x] Server Components
- [ ] `async` components:
https://github.com/testing-library/react-testing-library/issues/1209
- [x] 'server-only': https://github.com/vercel/next.js/pull/54891
- [x] Snapshot Testing
**Blockers:**
- TS: https://github.com/testing-library/jest-dom/issues/546
- None of the solutions in the issue work with Next.js v14.0.4 and TS v5
## Vitest
- [x] Unit Testing
- [x] Client Components
- [x] Server Components
- [ ] `async` components
- [x] 'server-only'
- [x] Update vitest example
- [x] Handles CSS, and CSS modules imports
- [x] Handles next/image
## Other
- https://github.com/vercel/next.js/issues/47448
- https://github.com/vercel/next.js/issues/47299
### Reason for making this change
https://yarnpkg.com/getting-started/qa#:~:text=yarn%2Finstall%2Dstate.,your%20workspaces%20all%20over%20again.
In the official documentation of `yarn`, it is stated that `.yarn/install-state.gz` is an optimization file that developer shouldn't ever have to commit. However, currently, when running `create-next-app`, `.yarn/install-state.gz` is being commited.
### Remaining work
I apologize for only modifying one template initially to initiate the discussion first.
If this change is agreed upon, it should be synchronized with other `.gitignore` templates. Would it be possible to follow a similar approach as in https://github.com/vercel/next.js/pull/47241? I would appreciate any assistance in syncing this change.
[Cypress](https://www.cypress.io/) recently went GA with a Component Testing offering which supports Next.js. This PR adds a brief section on what and how to use Cypress for component-level testing and updates the example project with a component test.
Any feedback on content or the example is welcome, thanks for considering!
## Documentation / Examples
- [x] Make sure the linting passes by running `pnpm build && pnpm lint`
- [x] The "examples guidelines" are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)
They are added to `.gitignore` already. Follow-up on #39051
## Bug
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have a helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the
feature request has been accepted for implementation before opening a
PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have a helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes by running `pnpm lint`
- [ ] The "examples guidelines" are followed from [our contributing
doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)
Co-authored-by: JJ Kasper <jj@jjsweb.site>
Let's open the deploy link in a new window so the link isn't blocked
when running an an iframe, such as Stackblitz.
Previously, this would print the following error:
> Refused to display 'https://vercel.com/' in a frame because it set
'X-Frame-Options' to 'deny'
This relates to a bug from issue #38957 found inside of the `with-cypress` example as a result of the recent typescript conversion. This issue can be resolved with adding `export {};` which prevents TypeScript from reading `.ts` configuration files from being read as legacy script files. This issue has been resolved on StackOverflow [here](https://stackoverflow.com/questions/56577201/why-is-isolatedmodules-error-fixed-by-any-import). More info on `--isolatedModules` can be read [here](https://www.typescriptlang.org/tsconfig#isolatedModules).
## Bug
- [x] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [x] Errors have helpful link attached, see `contributing.md`
Fixes#38597
- Update `with-cypress` example dependencies;
- Convert `with-cypress` example to TypeScript as suggested in the Contribution docs.
## Documentation / Examples
- [x] Make sure the linting passes by running `pnpm lint`
- [x] The examples guidelines are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing.md#adding-examples)
This PR updates the docs and examples for `create-next-app` to include pnpm usage.
The following script was used to update every example README:
```js
const fs = require('fs')
const examples = fs.readdirSync('./examples')
for (let example of examples) {
const filename = `./examples/${example}/README.md`
const markdown = fs.readFileSync(filename, 'utf8')
const regex = new RegExp(`^yarn create next-app --example (.*)$`, 'gm')
const output = markdown.replace(regex, (yarn, group) => {
const pnpm = `pnpm create next-app -- --example ${group}`
return `${yarn}\n# or\n${pnpm}`
})
fs.writeFileSync(filename, output)
}
```
* Add ci script to check examples
* Install moreutils for `sponge` command.
It's not very pretty, but I'm not sure how to replace sponge in a good way in the shell script
* Prettier names in the workflow
* Move "check-examples" into build_test_deploy workflow
* Start breaking the jq script into multiple lines
* Add checks for cleanups in vercel/next.js#27121
* Run the `check-examples.sh` script to cleanup all remaining examples.
This PR adds a with-cypress example to match the examples in upcoming docs.
## Documentation / Examples
- [ ] Make sure the linting passes
**Note:** This PR does not pass linting because ESLint needs to have the [eslint-plugin-cypress](https://github.com/cypress-io/eslint-plugin-cypress) installed globally to ignore the Cypress methods.