jest-image-snapshot VS ESLint

You can give a try about visual testing. I think about Cypress components and Cypress Image snapshot or Jest Image snapshot (not DOM testing)

puppeteer + jest-image-snapshot

A combination of https://github.com/americanexpress/jest-image-snapshot and whichever of https://www.npmjs.com/search?q=keywords:pdf%20to%20png renders your PDF the best should work.

We liked matcher functionality provided by jest-image-snapshot, so we just took this solution and adopted for jasmine and Karma.

Github repository of Jest-image-snapshot: https://github.com/americanexpress/jest-image-snapshot

Snapshot testing itself is a built-in feature of Jest, and when searching specifically for image snapshots, you'll quickly find jest-image-snapshot, which does great work comparing and updating image snapshots. It also provides convenience features like a base64 diff output, which allows us to view the diff from a CI environment (since the diff image file cannot be saved or viewed).

ESLint: A pluggable and configurable linter tool for identifying and reporting on patterns in JavaScript.

Automating code checks with static code analysis allows us to enforce code styling effectively. By integrating tools into our workflow, we can identify errors at an early stage, while coding instead of blocking us at the end. For instance, flake8 checks Python code for style and errors, eslint performs similar checks for JavaScript, and prettier automatically formats code to maintain consistency.

If you're a developer, you're surely familiar with Prettier and ESLint. With over 8 years of existence, they have established themselves as references in the JavaScript ecosystem.

eslint is used to avoid code errors

No lint errors: The committed code does not contain any lint errors (eslint).

Let’s walk through the steps for a one-time setup to configure husky pre-commit and pre-push hooks, ESLint with code styles conventions, prettier code formatter, and lint-staged. Husky automatically runs a script on each commit or push. This is useful for linting files to enforce code styles that keeps the entire code base following conventions.

GitHub | Website

ESLint: A pluggable and configurable linter tool for identifying and reporting on patterns in JavaScript.

ESLint

1. Lack of Static Code Analysis Static code analysis tools like TypeScript and ESLint play a crucial role in identifying and preventing bugs. TypeScript provides static typing, enhancing the robustness of the code. ESLint detects issues and enforces coding standards. The absence of these tools can significantly elevate the likelihood of bugs due to the lack of early detection and guidance provided during development.