json-stringify-safe vs fast-safe-stringify vs safe-json-stringify
Safe Stringification of JavaScript Objects Comparison
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What's Safe Stringification of JavaScript Objects?

In JavaScript, stringification refers to the process of converting an object into a JSON string representation. This is commonly done using the JSON.stringify() method. However, certain objects can cause issues during stringification, such as circular references (where an object references itself), large objects, or objects with non-serializable properties (like functions or symbols). To handle these challenges safely, developers use specialized libraries that provide safe stringification, ensuring that the process does not throw errors or crash the application. These libraries often implement techniques to detect and handle circular references, limit the depth of stringification, and exclude non-serializable properties, making them reliable tools for serializing complex JavaScript objects. This is particularly useful for logging, debugging, or sending data over the network without running into serialization issues.

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json-stringify-safe26,097,301
554-710 years agoISC
fast-safe-stringify17,419,071
351-94 years agoMIT
safe-json-stringify2,460,583
56-37 years agoMIT
Feature Comparison: json-stringify-safe vs fast-safe-stringify vs safe-json-stringify

Circular Reference Handling

  • json-stringify-safe:

    json-stringify-safe handles circular references by detecting them and replacing them with a specified placeholder (default is '[Circular]'). This simple approach prevents errors while stringifying objects with circular structures, making it easy to integrate into existing code.

  • fast-safe-stringify:

    fast-safe-stringify efficiently handles circular references by using a fast algorithm that detects and replaces them with a placeholder. This prevents infinite loops and stack overflow errors during stringification, making it a reliable choice for complex objects.

  • safe-json-stringify:

    safe-json-stringify handles circular references by detecting them and replacing them with a customizable placeholder. It also allows you to limit the depth of stringification, which helps prevent excessive memory usage and makes it safer for large or deeply nested objects.

Performance

  • json-stringify-safe:

    json-stringify-safe is not specifically optimized for performance, but its simplicity and lightweight nature make it suitable for most use cases. However, it may not be the best choice for stringifying very large or complex objects due to potential performance limitations.

  • fast-safe-stringify:

    fast-safe-stringify is designed for high performance, especially when dealing with large objects and circular references. It is significantly faster than many other safe stringification libraries, making it suitable for performance-critical applications where speed and efficiency are essential.

  • safe-json-stringify:

    safe-json-stringify offers good performance while providing safety features. It is faster than many traditional methods of handling circular references, but its performance may vary depending on the complexity of the objects being stringified.

Customization

  • json-stringify-safe:

    json-stringify-safe provides minimal customization, allowing you to specify a placeholder for circular references. However, it does not offer advanced customization features, keeping it simple and easy to use without overwhelming the developer with options.

  • fast-safe-stringify:

    fast-safe-stringify offers limited customization, focusing on speed and safety. It does not provide extensive options for modifying the stringification process, which makes it straightforward to use but less flexible for specialized needs.

  • safe-json-stringify:

    safe-json-stringify allows for more customization compared to the other libraries. It lets you set a maximum depth for stringification, customize the circular reference placeholder, and exclude specific properties using a filter function, making it more versatile for different use cases.

Code Example

  • json-stringify-safe:

    Safe Stringification with json-stringify-safe

    const stringifySafe = require('json-stringify-safe');

const obj = {
  name: 'Bob',
  circular: {},
};
obj.circular.self = obj; // Creating a circular reference

const jsonString = stringifySafe(obj);
console.log(jsonString);
  • fast-safe-stringify:

    Fast Safe Stringification with fast-safe-stringify

    const fastSafeStringify = require('fast-safe-stringify');

const obj = {
  name: 'Alice',
  circular: {},
};
obj.circular.self = obj; // Creating a circular reference

const jsonString = fastSafeStringify(obj);
console.log(jsonString);
  • safe-json-stringify:

    Safe Stringification with safe-json-stringify

    const safeJsonStringify = require('safe-json-stringify');

const obj = {
  name: 'Charlie',
  circular: {},
};
obj.circular.self = obj; // Creating a circular reference

const jsonString = safeJsonStringify(obj);
console.log(jsonString);
How to Choose: json-stringify-safe vs fast-safe-stringify vs safe-json-stringify
  • json-stringify-safe:

    Select json-stringify-safe if you require a simple and straightforward solution for handling circular references. It is easy to use and integrates well into existing codebases, making it a good choice for projects that need a quick fix without additional complexity.

  • fast-safe-stringify:

    Choose fast-safe-stringify if you need a high-performance solution that handles circular references and large objects efficiently. It is ideal for applications where speed is critical, and you want to minimize memory usage while ensuring safe stringification.

  • safe-json-stringify:

    Opt for safe-json-stringify if you want a balanced approach that offers safety against circular references while allowing customization of the stringification process. It provides options for limiting depth and excluding specific properties, making it suitable for more controlled stringification.

Similar Npm Packages to json-stringify-safe

json-stringify-safe is a JavaScript library that provides a safe way to stringify JavaScript objects, especially those that may contain circular references. When using the native JSON.stringify method, circular references can lead to errors, but json-stringify-safe handles these cases gracefully by replacing circular references with a specified placeholder. This makes it an essential tool for logging, debugging, or transmitting complex objects without running into issues caused by circular references.

While json-stringify-safe is a great option, there are other libraries available that also address the challenges of stringifying objects with circular references. Here are a couple of alternatives:

  • circular-json is a library designed to serialize and deserialize JavaScript objects that may contain circular references. It extends the functionality of JSON.stringify and JSON.parse to handle circular structures, allowing developers to easily work with complex data without worrying about errors. However, it's worth noting that circular-json has been deprecated in favor of other solutions, so while it may still be used in some projects, it is generally recommended to consider more modern alternatives.

  • flatted is a more recent library that provides similar functionality to circular-json, allowing for the serialization and deserialization of objects with circular references. It is designed to be a drop-in replacement for JSON.stringify and JSON.parse, making it easy to integrate into existing projects. flatted is actively maintained and offers a more modern approach to handling circular references, making it a suitable alternative to both json-stringify-safe and circular-json.

To compare these packages further, check out the following link: Comparing circular-json vs flatted vs json-stringify-safe.

Similar Npm Packages to fast-safe-stringify

fast-safe-stringify is a high-performance JSON stringifier that safely converts JavaScript objects into JSON strings while avoiding circular references. It is designed to be faster than the native JSON.stringify method while providing the same safety features for handling circular structures. This makes it particularly useful for applications that need to serialize complex objects without running into errors or performance bottlenecks.

While fast-safe-stringify is an excellent choice for safely stringifying objects, there are other libraries that offer similar functionality. Here are a few alternatives:

  • json-stringify-safe is a simple library that provides a safe version of JSON.stringify. It prevents circular references by replacing them with a placeholder value, allowing developers to serialize objects without encountering errors. While it may not be as fast as fast-safe-stringify, it is a reliable option for ensuring that your JSON serialization does not fail due to circular references.
  • safe-json-stringify is another library that aims to provide a safe way to stringify JSON. It handles circular references by replacing them with a specified placeholder and can also handle other edge cases that may arise during serialization. This library is particularly useful for applications that require a straightforward solution for safely converting objects to JSON without the need for high performance.

To see how fast-safe-stringify compares with json-stringify-safe and safe-json-stringify, check out the comparison: Comparing fast-safe-stringify vs json-stringify-safe vs safe-json-stringify.

Similar Npm Packages to safe-json-stringify

safe-json-stringify is a utility library designed to safely stringify JavaScript objects into JSON format. It addresses the common issue of circular references that can occur when trying to convert complex objects to JSON. By handling circular references gracefully, safe-json-stringify ensures that your application does not crash or throw errors during the stringification process. This makes it particularly useful for logging, debugging, or transmitting complex data structures.

While safe-json-stringify is a solid choice for safely stringifying JSON, there are several alternatives available that also provide similar functionality:

  • fast-safe-stringify is an optimized version of the safe JSON stringification process. It is designed for performance, making it faster than many other stringification libraries while still handling circular references. If you need a high-performance solution for stringifying JSON objects, fast-safe-stringify is an excellent option that maintains safety without sacrificing speed.
  • json-stringify-safe is another library that provides safe stringification of JSON objects. It prevents errors caused by circular references and offers a simple API. While it may not be as fast as fast-safe-stringify, it is still a reliable choice for ensuring that your JSON stringification process is safe and straightforward.
  • safe-stable-stringify focuses on producing stable and consistent stringified output. It ensures that the order of keys in the output JSON is consistent, which can be important for certain applications. Like the other libraries, it also handles circular references, making it a good choice if you need both safety and stable output.

To see how these libraries compare, check out the comparison: Comparing fast-safe-stringify vs json-stringify-safe vs safe-json-stringify vs safe-stable-stringify.

README for json-stringify-safe

json-stringify-safe

Like JSON.stringify, but doesn't throw on circular references.

Usage

Takes the same arguments as JSON.stringify.

var stringify = require('json-stringify-safe');
var circularObj = {};
circularObj.circularRef = circularObj;
circularObj.list = [ circularObj, circularObj ];
console.log(stringify(circularObj, null, 2));

Output:

{
  "circularRef": "[Circular]",
  "list": [
    "[Circular]",
    "[Circular]"
  ]
}

Details

stringify(obj, serializer, indent, decycler)

The first three arguments are the same as to JSON.stringify. The last is an argument that's only used when the object has been seen already.

The default decycler function returns the string '[Circular]'. If, for example, you pass in function(k,v){} (return nothing) then it will prune cycles. If you pass in function(k,v){ return {foo: 'bar'}}, then cyclical objects will always be represented as {"foo":"bar"} in the result.

stringify.getSerialize(serializer, decycler)

Returns a serializer that can be used elsewhere. This is the actual function that's passed to JSON.stringify.

Note that the function returned from getSerialize is stateful for now, so do not use it more than once.

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