watch vs chokidar vs gaze vs node-watch vs nodemon
File Watching Libraries in Node.js
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File Watching Libraries in Node.js

File watching libraries are essential tools in Node.js development that allow developers to monitor changes in the filesystem. These libraries can detect modifications to files and directories, enabling automated tasks such as rebuilding assets, reloading servers, or triggering other actions based on file changes. They enhance the development workflow by providing real-time feedback and reducing the need for manual intervention when files are updated.

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watch884,7661,282-599 years agoApache-2.0
chokidar011,96382.1 kB354 months agoMIT
gaze01,155-688 years agoMIT
node-watch034126.1 kB83 years agoMIT
nodemon026,698219 kB9a month agoMIT

Feature Comparison: watch vs chokidar vs gaze vs node-watch vs nodemon

Performance

  • watch:

    Watch is a simple utility that performs well for basic tasks. However, it may not be suitable for high-performance needs or large-scale applications.

  • chokidar:

    Chokidar is designed for high performance, utilizing native file system events where available, which makes it faster and more efficient than many alternatives. It can handle thousands of files with minimal overhead, making it ideal for large projects.

  • gaze:

    Gaze offers decent performance for smaller projects, but it may not be as efficient as Chokidar when dealing with a large number of files. It uses polling as a fallback, which can lead to higher resource usage in larger applications.

  • node-watch:

    Node-watch is lightweight and performs well for basic use cases, but its performance may degrade with a significant number of files due to its reliance on polling in some environments.

  • nodemon:

    Nodemon is optimized for development environments, automatically restarting the server when files change. While it is not a file watcher per se, its performance is adequate for most development scenarios, focusing on server-side applications.

Ease of Use

  • watch:

    Watch is designed for simplicity and ease of integration into scripts. It has a basic API that is easy to understand and use for simple tasks.

  • chokidar:

    Chokidar provides a rich API that is easy to use, with clear documentation and examples. It supports advanced features like debouncing and throttling, making it user-friendly for complex scenarios.

  • gaze:

    Gaze is known for its simplicity and ease of setup. It has a straightforward API that is easy to understand, making it a great choice for beginners or quick scripts.

  • node-watch:

    Node-watch has a minimalistic API that is easy to use for simple file watching tasks. It is straightforward but may lack some advanced features found in other libraries.

  • nodemon:

    Nodemon is very easy to use, requiring minimal configuration. It automatically watches for changes in your application files and restarts the server, making it perfect for development.

Feature Set

  • watch:

    Watch is a basic utility that offers simple file watching capabilities without advanced features. It is suitable for straightforward tasks but may not meet the needs of more complex projects.

  • chokidar:

    Chokidar offers a comprehensive feature set, including support for file and directory watching, event debouncing, and the ability to ignore specific files or directories. It also supports both polling and native file system events, providing flexibility based on the environment.

  • gaze:

    Gaze provides basic file watching capabilities and supports glob patterns for file matching. However, it lacks some advanced features found in Chokidar, making it less versatile for complex scenarios.

  • node-watch:

    Node-watch is a minimalistic library that focuses on basic file watching functionality. It does not offer advanced features like event debouncing or file ignoring, making it suitable for simpler use cases.

  • nodemon:

    Nodemon primarily focuses on restarting Node.js applications on file changes. It does not provide extensive file watching features but is highly effective for development workflows.

Community and Support

  • watch:

    Watch has a smaller community, and while it is functional for basic tasks, it may not have as much support or as many resources available compared to more popular libraries.

  • chokidar:

    Chokidar has a strong community and is widely used in the Node.js ecosystem, ensuring good support and regular updates. Its popularity means that developers can find plenty of resources and examples online.

  • gaze:

    Gaze has a smaller community compared to Chokidar, which may result in fewer resources and examples. However, it is still maintained and has a dedicated user base.

  • node-watch:

    Node-watch is less popular than Chokidar, resulting in a smaller community and fewer resources. It is still functional for basic use cases but may lack extensive support.

  • nodemon:

    Nodemon has a large and active community, making it easy to find help and resources. Its popularity in the Node.js development community ensures that it is well-maintained and updated regularly.

Use Cases

  • watch:

    Watch is useful for simple scripts or build processes that require basic file watching capabilities without the need for advanced features.

  • chokidar:

    Chokidar is ideal for applications that require monitoring a large number of files or directories, such as build tools, asset pipelines, or any application needing real-time updates based on file changes.

  • gaze:

    Gaze is suitable for smaller projects or scripts that require simple file watching without the need for extensive configuration or features.

  • node-watch:

    Node-watch is best for lightweight applications or scripts that need basic file watching capabilities without additional complexity.

  • nodemon:

    Nodemon is perfect for Node.js application development, where immediate feedback is required upon file changes, allowing for a smooth development workflow.

How to Choose: watch vs chokidar vs gaze vs node-watch vs nodemon

  • watch:

    Choose Watch if you need a simple file watching utility that is easy to integrate into scripts or build processes. It is a straightforward option for basic file watching tasks without the need for extensive configuration.

  • chokidar:

    Choose Chokidar if you need a highly efficient and reliable file watcher that can handle large numbers of files with minimal resource usage. It is particularly suited for projects that require watching multiple files or directories and need to respond quickly to changes.

  • gaze:

    Select Gaze if you prefer a simple and straightforward API for watching files and directories, especially for smaller projects. It is easy to set up and use, making it a good choice for quick tasks or scripts that require file watching without the overhead of more complex libraries.

  • node-watch:

    Opt for Node-watch if you want a lightweight and minimalistic file watching solution. It is suitable for basic use cases where you need to monitor a few files or directories without additional features or complexity.

  • nodemon:

    Use Nodemon if you are developing Node.js applications and want an automatic server restart feature when files change. It is specifically designed for development environments and is ideal for projects where you need to see changes reflected immediately without manual restarts.

Similar Npm Packages to watch

watch is a simple file watching library for Node.js applications. It allows developers to monitor changes in files and directories, triggering specified actions when changes are detected. While watch provides a straightforward solution for file watching, there are several alternatives in the Node.js ecosystem that offer additional features or improved performance. Here are a few notable alternatives:

  • chokidar is a highly efficient file watcher that is built on top of the native file watching capabilities of the operating system. It provides a rich API and is known for its performance and reliability. chokidar is particularly useful for applications that require real-time file watching, such as build tools or development servers. Its ability to handle large numbers of files and directories with minimal overhead makes it a popular choice among developers.
  • fsevents is a native file system event listener for macOS, specifically designed to provide efficient file watching capabilities on Apple’s operating system. It leverages the native file system events API, making it extremely fast and efficient for monitoring changes in files and directories. While fsevents is macOS-specific, it is often used in conjunction with other libraries to provide cross-platform file watching capabilities.
  • gaze is another file watching library that offers a simple API for monitoring file changes. It supports multiple file patterns and can watch files in subdirectories. gaze is particularly useful for projects that require a straightforward solution for file watching without the complexity of more advanced libraries. Its ease of use makes it a good choice for smaller projects or scripts.
  • node-watch is a minimalistic file watching library for Node.js that provides a simple API for monitoring file changes. It is lightweight and easy to use, making it suitable for projects that need basic file watching capabilities without additional overhead. node-watch is a good option for developers looking for a straightforward solution without the need for advanced features.

To compare these packages, check out the link: Comparing chokidar vs fsevents vs gaze vs node-watch vs watch.

Similar Npm Packages to chokidar

chokidar is a popular file-watching library for Node.js applications. It provides a simple and efficient way to monitor file changes in real-time, making it an essential tool for tasks such as live reloading during development, automated build processes, and file synchronization. Chokidar is known for its performance and reliability, as it uses native file system events to minimize resource usage while maintaining accuracy.

While chokidar is a robust choice for file watching, there are several alternatives available in the Node.js ecosystem. Here are a few noteworthy options:

  • gaze is a file-watching library that provides a simple API for monitoring file changes. It supports glob patterns, allowing users to watch multiple files or directories easily. Gaze is particularly useful for projects that require a straightforward solution for file watching without the need for advanced features. Its simplicity makes it a good choice for smaller projects or scripts where minimal configuration is desired.

  • node-watch is another lightweight file-watching library for Node.js. It provides a simple interface for monitoring changes to files and directories, and it can handle both file additions and deletions. Node-watch is easy to set up and can be a good alternative for developers looking for a minimalistic solution without the overhead of more complex libraries.

  • sane is a file-watching library that focuses on performance and efficiency. It uses a polling mechanism to watch files, which can be beneficial in certain scenarios where native file system events may not be reliable. Sane is particularly useful for projects that require compatibility across different operating systems or environments where file system events may behave inconsistently.

  • watchpack is a file-watching library that is often used in conjunction with build tools like Webpack. It provides a more advanced API for monitoring file changes and is designed to work efficiently with large codebases. Watchpack is ideal for developers who need a powerful solution for file watching in complex build systems and want to leverage its integration with other tools.

To explore how chokidar compares with its alternatives, check out the comparison: Comparing chokidar vs gaze vs node-watch vs sane vs watchpack.

Similar Npm Packages to gaze

gaze is a file watching library for Node.js that allows developers to monitor file changes in a directory. It is particularly useful for tasks such as automatically rebuilding projects, reloading servers, or triggering other actions when files are modified. While gaze is a solid choice for file watching, there are several alternatives available that provide similar functionality. Here are a few noteworthy options:

  • chokidar is a widely used file watching library that is known for its performance and efficiency. It uses native file system events to provide a more reliable and faster experience compared to other libraries. Chokidar is capable of watching large directories and can handle a variety of file system events, making it a popular choice for projects that require robust file watching capabilities. If you need a reliable and efficient solution for monitoring file changes, chokidar is an excellent option.
  • node-watch is another lightweight file watching library for Node.js. It provides a simple API for watching files and directories, and it supports both synchronous and asynchronous file change detection. Node-watch is easy to set up and can be a good choice for smaller projects or for developers who prefer a minimalistic approach to file watching.
  • nodemon is a utility that monitors for changes in your Node.js application and automatically restarts the server when file changes are detected. While it is primarily used for development purposes, nodemon can also be considered a file watching tool. It is particularly useful for developers who want to streamline their workflow by automatically restarting their applications during development.
  • watch is a simple file watching library that provides basic functionality for monitoring file changes. It is lightweight and easy to use, making it suitable for smaller projects or for developers who need a straightforward solution without additional complexity.

To see how gaze compares with chokidar, node-watch, nodemon, and watch, check out the comparison: Comparing chokidar vs gaze vs node-watch vs nodemon vs watch.

Similar Npm Packages to node-watch

node-watch is a simple and efficient file watching library for Node.js applications. It allows developers to monitor changes in the filesystem, such as file additions, deletions, and modifications, enabling automated tasks like rebuilding, reloading, or executing scripts in response to these changes. While node-watch is a solid choice for file watching, there are several alternatives available that offer similar or enhanced functionality. Here are a few noteworthy options:

  • chokidar is a popular file watching library that provides a more robust and feature-rich alternative to node-watch. It is built on top of the native file watching APIs and offers better performance and reliability. Chokidar supports a wide range of features, including debounce and throttle options, ignoring specific files or directories, and handling large directories efficiently. If you need a powerful and flexible file watcher for your Node.js applications, chokidar is an excellent choice.
  • gaze is another file watching library that focuses on simplicity and ease of use. It allows you to watch files and directories for changes and execute callbacks when changes occur. Gaze is particularly useful for smaller projects or when you need a straightforward solution without the additional complexity of more feature-rich libraries. If you want a lightweight option for file watching, gaze is worth considering.
  • nodemon is primarily a development tool that automatically restarts your Node.js application when file changes are detected. While it is not a dedicated file watching library like node-watch, it leverages file watching capabilities to enhance the development experience. Nodemon is particularly useful for Node.js developers who want to streamline their workflow by automatically reloading their applications during development.
  • sane is a file watching library that aims to provide a simple and efficient solution for monitoring file changes. It uses a polling mechanism to detect changes, making it suitable for environments where native file watching APIs may not be available or reliable. If you need a straightforward file watcher that works across various platforms, sane is a good option.
  • watch is a minimalistic file watching library that provides a simple API for monitoring file changes. It is designed to be lightweight and easy to use, making it suitable for smaller projects or scripts where you need basic file watching functionality without additional overhead.

To explore how these libraries compare, check out the comparison: Comparing chokidar vs gaze vs node-watch vs nodemon vs sane vs watch.

Similar Npm Packages to nodemon

nodemon is a utility that helps develop Node.js applications by automatically restarting the server whenever file changes in the directory are detected. This tool is particularly useful during development, as it allows developers to see changes in real-time without the need to manually stop and restart the server. With its simple configuration and ease of use, nodemon has become a popular choice among Node.js developers.

However, there are several alternatives to nodemon that also provide process management and server monitoring capabilities. Here are a few notable options:

  • forever is a simple CLI tool that ensures that a given script runs continuously. It is designed to keep your Node.js applications running indefinitely, automatically restarting them if they crash. While it doesn’t provide the same file-watching capabilities as nodemon, it is an excellent choice for production environments where you need to ensure that your application is always up and running.

  • pm2 is a powerful process manager for Node.js applications that offers advanced features such as load balancing, monitoring, and clustering. PM2 is particularly well-suited for production environments, as it provides robust process management capabilities, including automatic restarts, log management, and performance monitoring. If you're looking for a comprehensive solution to manage your Node.js applications in production, PM2 is an excellent choice.

  • supervisor is another tool that automatically restarts your Node.js application when file changes are detected. It is similar to nodemon but offers additional features such as the ability to monitor multiple processes and run scripts in parallel. Supervisor is a good alternative for developers who need a simple way to manage multiple Node.js applications during development.

For a detailed comparison of these packages, check out the following link: Comparing forever vs nodemon vs pm2 vs supervisor.

README for watch

watch -- Utilities for watching file trees in node.js

Install

  npm install watch

Purpose

The intention of this module is provide tools that make managing the watching of file & directory trees easier.

watch.watchTree(root, [options,] callback)

The first argument is the directory root you want to watch.

The options object is passed to fs.watchFile but can also be used to provide two additional watchTree specific options:

  • 'ignoreDotFiles' - When true this option means that when the file tree is walked it will ignore files that being with "."
  • 'filter' - You can use this option to provide a function that returns true or false for each file and directory to decide whether or not that file/directory is included in the watcher.
  • 'interval' - Specifies the interval duration in seconds, the time period between polling for file changes.
  • 'ignoreUnreadableDir' - When true, this options means that when a file can't be read, this file is silently skipped.
  • 'ignoreNotPermitted' - When true, this options means that when a file can't be read due to permission issues, this file is silently skipped.
  • 'ignoreDirectoryPattern' - When a regex pattern is set, e.g. /node_modules/, these directories are silently skipped.

The callback takes 3 arguments. The first is the file that was modified. The second is the current stat object for that file and the third is the previous stat object.

When a file is new the previous stat object is null.

When watchTree is finished walking the tree and adding all the listeners it passes the file hash (keys are the file/directory names and the values are the current stat objects) as the first argument and null as both the previous and current stat object arguments.

  watch.watchTree('/home/mikeal', function (f, curr, prev) {
    if (typeof f == "object" && prev === null && curr === null) {
      // Finished walking the tree
    } else if (prev === null) {
      // f is a new file
    } else if (curr.nlink === 0) {
      // f was removed
    } else {
      // f was changed
    }
  })

watch.unwatchTree(root)

Unwatch a previously watched directory root using watch.watchTree.

watch.createMonitor(root, [options,] callback)

This function creates an EventEmitter that gives notifications for different changes that happen to the file and directory tree under the given root argument.

The options object is passed to watch.watchTree.

The callback receives the monitor object.

The monitor object contains a property, files, which is a hash of files and directories as keys with the current stat object as the value.

The monitor has the following events.

  • 'created' - New file has been created. Two arguments, the filename and the stat object.
  • 'removed' - A file has been moved or deleted. Two arguments, the filename and the stat object for the fd.
  • 'changed' - A file has been changed. Three arguments, the filename, the current stat object, and the previous stat object.

The monitor can be stopped using .stop (calls unwatchTree).

  var watch = require('watch')
  watch.createMonitor('/home/mikeal', function (monitor) {
    monitor.files['/home/mikeal/.zshrc'] // Stat object for my zshrc.
    monitor.on("created", function (f, stat) {
      // Handle new files
    })
    monitor.on("changed", function (f, curr, prev) {
      // Handle file changes
    })
    monitor.on("removed", function (f, stat) {
      // Handle removed files
    })
    monitor.stop(); // Stop watching
  })

CLI

This module includes a simple command line interface, which you can install with npm install watch -g.

Usage: watch <command> [...directory] [OPTIONS]

OPTIONS:
    --wait=<seconds>
        Duration, in seconds, that watching will be disabled
        after running <command>. Setting this option will
        throttle calls to <command> for the specified duration.

    --filter=<file>
        Path to a require-able .js file that exports a filter
        function to be passed to watchTreeOptions.filter.
        Path is resolved relative to process.cwd().

    --interval=<seconds>
        Specifies the interval duration in seconds, the time period between polling for file changes.

    --ignoreDotFiles, -d
        Ignores dot or hidden files in the watch [directory].

     --ignoreUnreadable, -u
        Silently ignores files that cannot be read within the
        watch [directory].

     --ignoreDirectoryPattern=<regexp>, -p
        Silently skips directories that match the regular
        expression.

It will watch the given directories (defaults to the current working directory) with watchTree and run the given command every time a file changes.

Contributing

Releasing

On the latest clean master:

npm run release:major
npm run release:minor
npm run release:patch
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