api: "YAML JSON TOON Database"
version: "1.0.0"
format: "json"
dataset:
  id: 11
  slug: "javascript-es6-features"
  title: "JavaScript ES6+ Features Reference"
  description: "Key JavaScript features from ES6 through ES2022: arrow functions, template literals, destructuring, spread, async/await, optional chaining, nullish coalescing, and top-level await."
  category: "Programming Languages"
  category_slug: "programming-languages"
  tags: "javascript,es6,web,reference"
  view_count: 0
  created_at: 1777673262
  updated_at: 1777673262
data:
  features:
    - name: "Arrow Functions"
      version: "ES6 (2015)"
      description: "Concise function syntax with lexical this binding"
      example: "const add = (a, b) => a + b;"
    - name: "Template Literals"
      version: "ES6 (2015)"
      description: "String interpolation with backticks and ${}"
      example: "`Hello, ${name}!`"
    - name: "Destructuring"
      version: "ES6 (2015)"
      description: "Unpack values from arrays or objects into variables"
      example: "const {name, age} = person;"
    - name: "Spread Operator"
      version: "ES6 (2015)"
      description: "Expand iterables into individual elements"
      example: "const merged = [...arr1, ...arr2];"
    - name: "Async/Await"
      version: "ES8 (2017)"
      description: "Syntactic sugar over Promises for async code"
      example: "const data = await fetch(url);"
    - name: "Optional Chaining"
      version: "ES2020"
      description: "Safe nested property access without null check"
      example: "user?.profile?.name"
    - name: "Nullish Coalescing"
      version: "ES2020"
      description: "Fallback for null/undefined only (not falsy)"
      example: "const x = value ?? defaultValue;"
    - name: "Top-level Await"
      version: "ES2022"
      description: "Use await outside async functions in modules"
      example: "const config = await loadConfig();"