yamljs vs js-yaml vs yaml vs yaml-front-matter
YAML Parsing Libraries
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YAML Parsing Libraries

YAML parsing libraries are essential tools in web development for reading, writing, and manipulating YAML (YAML Ain't Markup Language) files, which are often used for configuration files, data serialization, and data exchange. These libraries provide developers with the ability to easily convert YAML data into JavaScript objects and vice versa, facilitating seamless integration of YAML into applications. The choice of a specific library can depend on factors such as performance, ease of use, and specific features like front matter support or schema validation.

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yamljs2,079,040888-539 years agoMIT
js-yaml06,558386 kB705 months agoMIT
yaml01,638685 kB308 days agoISC
yaml-front-matter0194-215 years agoMIT

Feature Comparison: yamljs vs js-yaml vs yaml vs yaml-front-matter

Performance

  • yamljs:

    yamljs provides a straightforward parsing and stringifying process, but its performance may not be as optimized as other libraries when handling very large YAML files.

  • js-yaml:

    js-yaml is optimized for performance and can handle large YAML files efficiently. It balances speed with feature richness, making it suitable for applications that require robust YAML processing.

  • yaml:

    yaml is designed with performance in mind, utilizing a streaming approach for parsing and dumping, which allows it to handle large datasets with minimal memory overhead, making it one of the fastest options available.

  • yaml-front-matter:

    yaml-front-matter is lightweight and efficient, specifically optimized for extracting front matter from YAML files. Its performance is adequate for typical use cases involving metadata extraction.

Feature Set

  • yamljs:

    yamljs offers basic YAML parsing and stringifying capabilities, making it easy to use for simple tasks. However, it lacks some advanced features found in other libraries.

  • js-yaml:

    js-yaml supports a wide range of YAML features, including complex data structures, custom types, and schema validation. It is a comprehensive solution for most YAML-related tasks.

  • yaml:

    yaml focuses on modern YAML features and provides a minimalistic API. It supports advanced features like anchors and aliases, making it suitable for contemporary YAML use cases.

  • yaml-front-matter:

    yaml-front-matter specializes in parsing front matter, allowing users to easily extract metadata from YAML documents. It is not a full YAML parser but excels in its niche functionality.

Ease of Use

  • yamljs:

    yamljs is simple to use and requires minimal setup, making it accessible for quick YAML manipulation tasks. Its API is straightforward, but it may lack advanced features.

  • js-yaml:

    js-yaml has a straightforward API that is easy to understand for both beginners and experienced developers. Its documentation is comprehensive, aiding in quick adoption.

  • yaml:

    yaml provides a clean and intuitive API, making it easy to integrate into projects. Its modern design philosophy ensures that developers can quickly grasp its usage.

  • yaml-front-matter:

    yaml-front-matter is specifically designed for simplicity, allowing users to easily extract front matter without needing to understand the full YAML structure, making it user-friendly for non-developers.

Community and Support

  • yamljs:

    yamljs has a modest community and is less frequently updated. While it is easy to use, developers may find limited resources and support for complex issues.

  • js-yaml:

    js-yaml has a large user base and an active community, ensuring that developers can find support and resources easily. Its popularity means that it is regularly maintained and updated.

  • yaml:

    yaml is gaining traction and has a growing community. While it may not be as widely used as js-yaml, it is well-documented and supported by its maintainers.

  • yaml-front-matter:

    yaml-front-matter has a smaller community focused on specific use cases, but it is well-documented for its intended purpose. Support may be limited compared to more popular libraries.

Compatibility

  • yamljs:

    yamljs is compatible with Node.js and can be used in browser environments, though it may not support all modern YAML features as comprehensively as other libraries.

  • js-yaml:

    js-yaml is compatible with Node.js and browser environments, making it versatile for both server-side and client-side applications. It supports various YAML versions and is widely used in diverse projects.

  • yaml:

    yaml is also compatible with Node.js and browser environments, focusing on modern JavaScript features. It is suitable for applications that prioritize performance and simplicity.

  • yaml-front-matter:

    yaml-front-matter is designed to work seamlessly with static site generators and other tools that utilize front matter, making it a great choice for projects in that domain.

How to Choose: yamljs vs js-yaml vs yaml vs yaml-front-matter

  • yamljs:

    Consider yamljs for a library that offers both YAML parsing and stringifying capabilities with a focus on simplicity. It is particularly useful for projects that need straightforward YAML manipulation without additional dependencies.

  • js-yaml:

    Choose js-yaml for a well-established, widely-used library that provides a robust set of features for parsing and dumping YAML. It is suitable for most general use cases and has a large community for support.

  • yaml:

    Select yaml if you need a modern, lightweight library that focuses on simplicity and performance. It is designed for speed and efficiency, making it a good choice for applications where performance is critical.

  • yaml-front-matter:

    Opt for yaml-front-matter if your project requires handling front matter in YAML files, commonly used in static site generators. This library allows you to easily parse and extract metadata from YAML documents.

Similar Npm Packages to yamljs

yamljs is a JavaScript library that allows developers to parse and stringify YAML (YAML Ain't Markup Language) files easily. It provides a straightforward API for working with YAML data, making it a popular choice for applications that require configuration files or data interchange in a human-readable format. While yamljs is a solid option for handling YAML, there are other libraries available that also serve this purpose. Here are a few alternatives:

  • js-yaml is a widely used library for parsing and dumping YAML in JavaScript. It is known for its performance and flexibility, supporting both Node.js and browser environments. js-yaml is particularly useful for developers who need to work with YAML in various contexts, such as server-side applications or client-side scripts. Its robust feature set and active community make it a reliable choice for handling YAML data.
  • yaml is another modern YAML parser and serializer for JavaScript. It aims to provide a more complete and user-friendly interface compared to other libraries. yaml supports advanced features such as custom types and schema validation, making it suitable for complex applications that require more than just basic YAML parsing and stringification. If you need a library that offers both simplicity and advanced capabilities, yaml is an excellent option.

To see how yamljs compares with js-yaml and yaml, check out the comparison: Comparing js-yaml vs yaml vs yamljs.

Similar Npm Packages to js-yaml

js-yaml is a popular JavaScript library for parsing and dumping YAML (YAML Ain't Markup Language) data. It allows developers to easily convert YAML data into JavaScript objects and vice versa, making it a valuable tool for applications that require configuration files or data serialization in YAML format. While js-yaml is widely used, there are several alternatives in the ecosystem that also provide YAML parsing and manipulation capabilities. Here are a few notable alternatives:

  • yaml is a modern YAML parser and serializer for JavaScript. It aims to provide a more robust and feature-rich alternative to js-yaml, with support for advanced YAML features and better performance. The library is designed to be easy to use and integrates well with both Node.js and browser environments. If you are looking for a library that offers more features and better performance for handling YAML data, yaml is a great option.
  • yaml-front-matter is a specialized library that focuses on parsing YAML front matter, which is commonly used in static site generators like Jekyll and Gatsby. This library allows developers to easily extract front matter from documents, making it particularly useful for managing metadata in markdown files. If your project involves working with markdown files that include YAML front matter, yaml-front-matter is a convenient choice.
  • yamljs is another library for parsing and dumping YAML in JavaScript. It offers a simple API for converting YAML to JavaScript objects and vice versa. While it may not have as many features as some of the other libraries, it is lightweight and easy to use, making it suitable for smaller projects or applications that require basic YAML functionality.

For a detailed comparison of these libraries, check out the link: Comparing js-yaml vs yaml vs yaml-front-matter vs yamljs.

Similar Npm Packages to yaml

yaml is a JavaScript library for parsing and stringifying YAML (YAML Ain't Markup Language) data. It provides a straightforward way to work with YAML files in Node.js and browser environments, making it easier for developers to read and write configuration files, data exchange formats, and more. While yaml is a robust option for handling YAML data, there are other libraries available that serve similar purposes. Here are a couple of alternatives:

  • js-yaml is a widely used library for parsing and dumping YAML in JavaScript. It is known for its simplicity and ease of use, making it a popular choice among developers. js-yaml supports both Node.js and browser environments and offers features such as custom type handling and support for complex data structures. If you need a reliable and well-documented library for working with YAML in your JavaScript projects, js-yaml is an excellent option.
  • yamljs is another library for parsing and stringifying YAML in JavaScript. It is lightweight and designed to be easy to use, making it suitable for projects that require basic YAML functionality without the overhead of more complex libraries. yamljs allows you to convert YAML to JavaScript objects and vice versa, making it a good choice for simple applications or scripts that need to handle YAML data.

To compare these libraries, check out the following link: Comparing js-yaml vs yaml vs yamljs.

Similar Npm Packages to yaml-front-matter

yaml-front-matter is a JavaScript library designed to parse YAML front matter from text files. Front matter is a common pattern used in static site generators and content management systems, where metadata is defined at the beginning of a file, typically in YAML format. This library allows developers to easily extract this metadata and the content of the file, making it a useful tool for managing structured data in markdown or other text-based formats.

While yaml-front-matter is a robust option for handling YAML front matter, there are several alternatives worth considering:

  • front-matter is a simple library that extracts front matter from markdown files. It supports both YAML and JSON formats, making it versatile for different use cases. If you're looking for a straightforward solution to parse front matter without the need for YAML-specific features, front-matter is a solid choice.
  • gray-matter is another popular library for parsing front matter, supporting multiple formats including YAML, JSON, and TOML. It is widely used in static site generators like Gatsby and Next.js. gray-matter provides additional features such as the ability to customize delimiters and parse front matter from various file types, making it a flexible option for developers who need more control over their front matter parsing.
  • js-yaml is a YAML parser and dumper for JavaScript. While it is not specifically designed for front matter, it can be used in conjunction with other libraries to handle YAML data. If your project requires extensive YAML parsing capabilities beyond just front matter, js-yaml is a powerful tool that can meet those needs.
  • yamljs is another library for parsing and dumping YAML in JavaScript. Similar to js-yaml, it is not specifically focused on front matter but can be used to work with YAML data in various contexts. If you need a lightweight library for general YAML handling, yamljs is a good option.

To compare these packages and find the best fit for your project, check out the comparison link: Comparing front-matter vs gray-matter vs js-yaml vs yaml-front-matter vs yamljs.

README for yamljs

yaml.js

Build status

Standalone JavaScript YAML 1.2 Parser & Encoder. Works under node.js and all major browsers. Also brings command line YAML/JSON conversion tools.

Mainly inspired from Symfony Yaml Component.

How to use

Import yaml.js in your html page:

<script type="text/javascript" src="yaml.js"></script>

Parse yaml string:

nativeObject = YAML.parse(yamlString);

Dump native object into yaml string:

yamlString = YAML.stringify(nativeObject[, inline /* @integer depth to start using inline notation at */[, spaces /* @integer number of spaces to use for indentation */] ]);

Load yaml file:

nativeObject = YAML.load('file.yml');

Load yaml file:

YAML.load('file.yml', function(result)
{
    nativeObject = result;
});

Use with node.js

Install module:

npm install yamljs

Use it:

YAML = require('yamljs');

// parse YAML string
nativeObject = YAML.parse(yamlString);

// Generate YAML
yamlString = YAML.stringify(nativeObject, 4);

// Load yaml file using YAML.load
nativeObject = YAML.load('myfile.yml');

Command line tools

You can enable the command line tools by installing yamljs as a global module:

npm install -g yamljs

Then, two cli commands should become available: yaml2json and json2yaml. They let you convert YAML to JSON and JSON to YAML very easily.

yaml2json

usage: yaml2json [-h] [-v] [-p] [-i INDENTATION] [-s] [-r] [-w] input

Positional arguments:
  input                 YAML file or directory containing YAML files.

Optional arguments:
  -h, --help            Show this help message and exit.
  -v, --version         Show program's version number and exit.
  -p, --pretty          Output pretty (indented) JSON.
  -i INDENTATION, --indentation INDENTATION
                        Number of space characters used to indent code (use 
                        with --pretty, default: 2).
  -s, --save            Save output inside JSON file(s) with the same name.
  -r, --recursive       If the input is a directory, also find YAML files in 
                        sub-directories recursively.
  -w, --watch           Watch for changes.

json2yaml

usage: json2yaml [-h] [-v] [-d DEPTH] [-i INDENTATION] [-s] [-r] [-w] input

Positional arguments:
  input                 JSON file or directory containing JSON files.

Optional arguments:
  -h, --help            Show this help message and exit.
  -v, --version         Show program's version number and exit.
  -d DEPTH, --depth DEPTH
                        Set minimum level of depth before generating inline 
                        YAML (default: 2).
  -i INDENTATION, --indentation INDENTATION
                        Number of space characters used to indent code 
                        (default: 2).
  -s, --save            Save output inside YML file(s) with the same name.
  -r, --recursive       If the input is a directory, also find JSON files in 
                        sub-directories recursively.
  -w, --watch           Watch for changes.

examples

# Convert YAML to JSON and output resulting JSON on the console
yaml2json myfile.yml

# Store output inside a JSON file
yaml2json myfile.yml > output.json

# Output "pretty" (indented) JSON
yaml2json myfile.yml --pretty

# Save the output inside a file called myfile.json
yaml2json myfile.yml --pretty --save

# Watch a full directory and convert any YAML file into its JSON equivalent
yaml2json mydirectory --pretty --save --recursive

# Convert JSON to YAML and store output inside a JSON file
json2yaml myfile.json > output.yml

# Output YAML that will be inlined only after 8 levels of indentation
json2yaml myfile.json --depth 8

# Save the output inside a file called myfile.json with 4 spaces for each indentation
json2yaml myfile.json --indentation 4

# Watch a full directory and convert any JSON file into its YAML equivalent
json2yaml mydirectory --pretty --save --recursive
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