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SkillSnap Official GuideUpdated 7/24/2026
JSON
The data interchange format of the web. Master strict syntax, serialization tricks, and tools like 'jq' for efficient data handling.
Syntax & Core Rules
Double quotes mandatory for keys/strings"key": "value"
Last item must not have a commaNo Trailing Commas
Standard JSON does not support commentsNo Comments
Dates as strings ("2025-12-26T13:00:00Z")ISO 8601
Standard encodingUTF-8
JavaScript Methods
Deserialize string to object (Wrap in try/catch)JSON.parse(str)
Serialize object to stringJSON.stringify(obj)
Pretty print with 2-space indentationstringify(obj, null, 2)
Filter/Transform values during stringifyReplacer Func
Transform values during parseReviver Func
Best Practices
Avoid deep nesting for easier parsingFlat Structure
Correct Content-Type headerapplication/json
Use true/false literals, not 0/1Booleans
Modern alternative to JSON deep-clone hackstructuredClone()
Tools & Ecosystem
CLI tool for filtering/processing JSONjq
Standard for validation/contractsJSON Schema
API testing standardPostman
Generate types (TS/Go/etc) from JSONQuicktype
Performance & Security
Process line-by-line for massive filesStreaming (NDJSON)
Prevent XSS in user-generated contentSanitization
Prevent stack overflow attacksDepth Limit
Compress payloads (Highly effective)Gzip/Brotli