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Syntax Foundations

JSON object JSON array String value Number value Boolean value Null value Nested objects Nested arrays

String Rules

Escaped quote Backslash escape Newline escape Unicode escape Surrogate pair Control character restriction Property names require quotes Whitespace rules

Numbers & Types

Integer number Decimal number Exponent notation Negative number No NaN No Infinity No comments No trailing commas

Data Modeling

Object versus array Array of objects Lookup object Optional property with null Nested resource Flat resource Identifier field Versioned payload

JavaScript Integration

JSON.parse JSON.stringify Pretty printing Replacer function Reviver function Omit undefined Date serialization BigInt serialization strategy

API Payloads

Request body Response envelope Error object Pagination metadata Cursor pagination Problem details shape Patch-like payload Webhook event payload

Validation

Required property concept Type constraint concept Enum constraint concept Array item constraint String length constraint Numeric range constraint Pattern constraint Additional properties concept

Operations

Canonical key ordering Minification Pretty formatting NDJSON records JSON Lines streaming Deep clone caveat Prototype safety Large document parsing strategy

JSON / Operations

JSON Lines streaming

Learn JSON Lines streaming in JSON with a dedicated explanation, a topic-specific example, edge guidance, and a mastery check.

12 min read • Advanced

json-061.json

json

const lines = [1,2,3].map(id => JSON.stringify({id,status:"queued"})).join("\n");
console.log(lines);

What to watch

Content source & attribution

Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

JSON Lines streaming Mastery Check →

Deep clone caveat