![]() ![]() You can probably imagine what happens when one developer lints the code and the other doesn't. You can find an overview of all the rules that ESLint can check here. it can check whether you have any dead code (unused variables), unnecessary code (console logs, alerts). Rather than unifying formatting (although it can also check such rules: ) ESLint serves to monitor the "code quality rules". it is not set to automatically run the format after saving the file), the formatting will not occur and after the push, the unformatted code will be sent to the repository. In the case of VSCode, it is the "ESLint" plugin ( ), WebStorm has ESLint integrated without the need to install the plugin, but it must be configured correctly ( https: //If the developer does not have ESLint in the IDE or has it set up incorrectly (e.g. However, this functionality is usually provided in the IDE by a plugin. Many developers run this command with an IDE that will automatically format the file after saving it. The developer did not run the prettier -writecommand that "normalizes" (formats them into the same shape). The resulting diff is useless and most importantly it does not carry any value and should not be part of the Git history at all. A situation can occur when one developer pushes a new file into the repository, using semicolons at the end of lines everywhere, and after X commits another developer comes with his modification and deletes all the semicolons. Unfortunately, this is actually a possibility. Prettier is used to enforce the same formatting rules for files across different developers, so at first glance it might seem that if Prettier is configured into a project, it is not possible, for example, for one developer to use semicolons at the end of a line and another not. Unfortunately, this is again another very broad topic, so I'll just try to briefly explain the basic problem. ESLint, PrettierĪnother frequent cause of unwanted diffs can be incorrectly configured work with ESLint and Prettier. ![]() This solution reliably ensures that only LF type line endings are allowed into the repository. gitattributesand within it * text=auto eol=lf. We don't rely on the developer setting up Git correctly. I will not describe all of them, but I would like to describe the solution that we use on projects at Synetech. There are a couple of ways to deal with this problem. ![]() So if two identical files are uploaded to Git, but each with different check characters for line breaks, it will evaluate them as diff. Although a developer cannot tell the difference in an IDE, between a file saved as LF and CRLF, Git can. In short, Linux and MacOS use the control (invisible) LF character to mark a new line, while Windows uses the CRLF character. Non-uniform line ends can be a frequent cause of unwanted diffs. CRLF vs LFĪs they say “first things first”. The primary cause of these problems lies somewhere else entirely, namely that the project is not set up robustly enough to cope with the different environments in which individual developers work, or rather to catch these errors if possible before they are pushed into the repository, but more on that later. In my opinion, these missteps are often mistakenly attributed to junior developers who are not (in an exaggeration) enlightened enough to know how to set up their machine to avoid such situations. You can find yourself in the same situation when you did a code review for another developer, who ignored such a wild diff and pushed the change. Voila, prettier formatting is applied automatically, and now your code is a joy to work with.This situation has probably happened to you… You pulled code from the repository, made a change, saved the file, and when you looked at the diff, you were horrified to see how the whole file lit up green, when you only changed one line. Now open a file of your choice that you’ve configured to format with Prettier, change something and save it. ![]() Note the text box ‘Run for files’, and adjust extensions as needed here. Enable ‘On save’ checkbox and click OK.To do that, simply go to your Preferences/Plugins, look for Prettier and install it.Īfter that, you’ll actually need to enable prettier to format your code ‘on save’, which is a convenient time-saving option. Thirdly, you’ll need to add a Prettier plugin to your WebStorm. Here is an example using the JavaScript option. There is many ways to do this, as prettier provides many configuration options. Secondly, you’ll need to configure prettier to your liking. In this post I would like to outline the steps necessary to configure Prettier for WebStorm.įirst things first, you’ll need to install prettier in your project. Automated code formatting can be an amazing time saver when properly configured within your IDE of choice. ![]()
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