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Javascript: What is eslintcache file and why is always generated in create react app

What is eslintcache

Why it is always auto generating on the react app.

eslintcache

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jac wida Avatar asked Dec 21 '20 10:12

jac wida


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Why is Eslintcache generated?

eslint goes over your code and reports stylistic errors. Usually going over the whole code is unneccessary, because you only changed a few files since the last run. To be able to track which files changed, and which errors occured in the files which were not changed, eslint is writing a cache (into the file you found).

What does Eslintcache do?

eslintcache by default. Enabling this option can dramatically improve ESLint's running time by ensuring that only changed files are linted.

What is reportWebVitals create React app?

Create React App includes a built-in tool for measuring the real life performance of your app. It is called reportWebVitals and it measures a set of metrics that aim to capture the user experience of a web page. This set is called web vitals and includes: First Contentful Paint.

Why is ESLint writing to my cache?

To be able to track which files changed, and which errors occured in the files which were not changed, eslint is writing a cache (into the file you found). Usually that file is supposed to be in /node_modules/.cache/, so you usually won't notice it.

What is ESLint and how does it work?

eslint goes over your code and reports stylistic errors. Usually going over the whole code is unneccessary, because you only changed a few files since the last run. To be able to track which files changed, and which errors occured in the files which were not changed, eslint is writing a cache (into the file you found).

Do I need ESLint with create-react-app?

Notably missing from the dependencies list that follows is eslint. create-react-app gives you an application with eslint preinstalled so we don’t need to install that. Note: You can use npm or yarn to install packages. If you don’t know the difference right now then don’t worry, they’ll both work well for you so just use npm.

How to make ESLint only run on changed files?

I'd recommend just adding it to the .gitignore file if it isn't in there already. Store the info about processed files in order to only operate on the changed ones. The cache is stored in .eslintcache by default. Enabling this option can dramatically improve ESLint's running time by ensuring that only changed files are linted.


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1 Answers

eslint goes over your code and reports stylistic errors. Usually going over the whole code is unneccessary, because you only changed a few files since the last run. To be able to track which files changed, and which errors occured in the files which were not changed, eslint is writing a cache (into the file you found).

Usually that file is supposed to be in /node_modules/.cache/, so you usually won't notice it. That it resides in your working directory is a bug.

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Jonas Wilms Avatar answered Oct 19 '22 13:10

Jonas Wilms