npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

eslint-plugin-safe-jsx

v1.1.1

Published

An ESLint plugin that enforces explicit boolean conversion before using && operator with JSX in React and React Native.

Downloads

2,736

Readme

🛡️ eslint-plugin-safe-jsx

eslint-plugin-safe-jsx is an ESLint plugin that enforces explicit boolean conversion before using the && operator with JSX in React and React Native applications. This plugin improves the reliability of your code by helping prevent certain types of bugs that can break your app.

💡 Why Use eslint-plugin-safe-jsx?

In JavaScript, certain "falsy" values such as 0, '', and null can lead to unexpected behavior when used in a logical expression. This can be particularly problematic in React JSX code, where you might be expecting a boolean value.

Consider the following example:

const myText = 0;
myText && <Text>{myText}</Text>;

In this scenario, the code tries to render 0 outside the Text component, leading to a failure. The issue is even more critical when the variable value comes from a server or an external source. This ESLint rule helps prevent such scenarios from occurring.

With eslint-plugin-safe-jsx, ESLint will alert you to these potential errors and can even auto-fix them, like so:

const myText = 0;
Boolean(myText) && <Text>{myText}</Text>;

Now, myText is explicitly converted to a boolean before being used in the logical expression, preventing the 0 from being rendered.

For more examples, check out our test cases.

🚀 Installation

You'll first need to install ESLint:

# npm
npm install eslint --save-dev

# yarn
yarn add eslint --dev

Next, install eslint-plugin-safe-jsx:

# npm
npm install eslint-plugin-safe-jsx --save-dev

# yarn
yarn add eslint-plugin-safe-jsx --dev

Note: If you installed ESLint globally (using the -g flag in npm, or the global prefix in yarn) then you must also install eslint-plugin-safe-jsx globally.

⚙️ Usage

Add safe-jsx to the plugins section of your .eslintrc configuration file. You can omit the eslint-plugin- prefix:

{
  "plugins": ["safe-jsx"]
}

Then configure the rules you want to use under the rules section.

{
  "rules": {
    "safe-jsx/jsx-explicit-boolean": "error" // or "warn"
  }
}

📚 Supported Rules

  • jsx-explicit-boolean: Enforces explicit boolean conversion before using the && operator with JSX.

🤝 Contributing

We welcome your contributions! For major changes, please open an issue first to discuss what you would like to change. Don't forget to update tests as appropriate.

📃 License

MIT