Скачать или смотреть Resolving Parsing Error: Unexpected Token in Page Object Model with Playwright and TypeScript

Learn how to fix the linting error `Parsing error: Unexpected token` in your Playwright TypeScript Page Object Model by switching to the appropriate parser configuration.
---
This video is based on the question https://stackoverflow.com/q/78125431/ asked by the user 'simpleMan' ( https://stackoverflow.com/u/13247675/ ) and on the answer https://stackoverflow.com/a/78125528/ provided by the user 'Ｒの卄ＩＴ' ( https://stackoverflow.com/u/8126354/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, comments, revision history etc. For example, the original title of the Question was: Page Object Model in playwright typscript gets Linting Error of Parsing error: Unexpected token

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Fix Linting Errors in Playwright TypeScript Page Object Models

When working on automation tests using Playwright and TypeScript, you might encounter a frustrating linting error: Parsing error: Unexpected token. This issue often arises when your linting tool isn’t properly configured to handle TypeScript files. Below, we'll walk through how to resolve this error, ensuring your code passes lint checks smoothly.

Understanding the Problem

The issue occurs when you run your lint command, and it fails to parse your TypeScript code. For instance, consider the following error output:

[[See Video to Reveal this Text or Code Snippet]]

This specific error relates to TypeScript syntax that the current parser can't understand, and typically points to how the ESlint is set up in your project.

What’s Causing the Error?

In the provided example, the user was utilizing @babel/eslint-parser, which is designed for parsing JavaScript, not TypeScript. Thus, when it encounters TypeScript-specific constructs (like type annotations), it fails to parse and results in the aforementioned error.

The Solution: Use the Correct Parser

To resolve this parsing error, you need to switch to a parser that can handle TypeScript: @typescript-eslint/parser. Below are the steps to fix the linting issue in your project.

Step 1: Install Necessary Packages

Open your terminal and install the required packages by running:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Update Your ESLint Configuration

Next, modify your .eslintrc.js file to utilize the correct parser and extend the configurations for TypeScript. Below is an example of how to structure your configuration file:

[[See Video to Reveal this Text or Code Snippet]]

Key Changes in the Configuration

Parser Flag: Using @typescript-eslint/parser instead of @babel/eslint-parser allows ESLint to understand TypeScript syntax.

Extends Array: Adding "plugin:@typescript-eslint/recommended" to the extends array enhances your linting rules for TypeScript, making your code more robust.

Plugins: Including @typescript-eslint in the plugins section activates the TypeScript-specific rules.

Conclusion

Following the above steps should resolve the Parsing error: Unexpected token error in your Playwright TypeScript project. By ensuring that ESLint uses the correct parser, you'll not only fix the immediate issue but also benefit from improved linting specific to TypeScript.

Moving forward, validate your configurations each time you start a new project to prevent similar errors and maintain a smooth development process.

With this solution, you can now focus more on creating robust automated tests without the distractions of parser errors. Happy testing!