JSON.stringify

Requirements

• Export stringify as named and default. Implement compact serialization without JSON.stringify or serialization libraries.
• Escape quotes, backslashes, control characters, and lone UTF-16 surrogates; preserve valid Unicode pairs. Serialize nonfinite numbers as null and -0 as 0.
• Visit own enumerable string keys in Object.keys order. Ignore inherited and symbol keys, and custom array properties. Do not mutate input.
• Inputs are acyclic JSON-compatible values: null, booleans, numbers, strings, dense arrays, and plain objects.
• Undefined, functions, symbol values, sparse arrays, BigInt, toJSON, wrappers, cycles, replacer, and indentation are excluded from this first version.

Examples

Input: stringify({ user: "Ada", scores: [1, 2], active: true });
Output: {"user":"Ada","scores":[1,2],"active":true}