json-yieldify

node-json-yieldify

An async JSON.stringify that yields periodically to the event loop.

const JsonYieldify = require('json-yieldify');

JsonYieldify.stringify({greetings: 'Hello!'}, (err, json) => {
  if (err) return cb(err);
  // json = {"greetings":"Hello!"}
});

Installation

$ npm install json-yieldify

Features

• JSON.stringify that doesn't block the event loop
• Supports the replacer argument
• Supports the space argument (pretty-print)
• Handles arbitrarily complex arrays and object graphs

Planned

• Readable stream signature
• Writeable stream signature (like JSONStream, but the values can be aribtrarily large)

API

A single function is exported.

JsonYieldify.stringify(value[, replacer[, space]], cb)

The first three arguments are identical to the native JSON.stringify. The final argument is a Node-style callback (e.g. (err, json) =>).

See here for an explanation of the JSON.stringify arguments.

Mutating the value while the function is running results in undefined behavior.

Alternatives

There are some other options in this space that may better meet your requirements.

• If you are streaming a large array of small JavaScript values (e.g. rows from a Postgres table), you should use JSONStream.