JSON-Lean

Extract/Merge key and value trees from a JSON.

It reduces the size of your requests, if the client already has the key tree. Especially useful for repeating requests, as you can send the data tree alone (on average 1/3 smaller than a complete JSON).

Installation

npm install json-lean

Example

Input:

{
    "array": [
        1,
        2
    ],
    "integer": 1042,
    "boolean": false,
    "object": {
        "name": "Oscar"
    },
    "string": "I love deadlines. I like the whooshing sound they make as they fly by."
}

Output - Keys

This should be stored with the client.

Once the first (unencoded) request is made, you should make requests to the encoded endpoint.

Keys are sorted.

[
    "array",
    "boolean",
    "integer",
    {
        "object": [
            "name"
        ]
    },
    "string"
]

Output - Values

This example is 34% smaller than the original JSON with keys.

[
    [
        1,
        2
    ],
    false,
    1042,
    [
        "Oscar"
    ],
    "I love deadlines. I like the whooshing sound they make as they fly by."
]

Recombine

Decoding is transparent. You can add it as a step before your actual data parsing.

{
    "array": [
        1,
        2
    ],
    "boolean": false,
    "integer": 1042,
    "object": {
        "name": "Oscar"
    },
    "string": "I love deadlines. I like the whooshing sound they make as they fly by."
}

Even less?

Check out json-slim for a minifier better than JSON.stringify().