---
title: JavaScript 參考文件
slug: Web/JavaScript/Reference
tags:
  - JavaScript
  - NeedsTranslation
translation_of: Web/JavaScript/Reference
---
<div>{{JsSidebar}}</div>

<p>在 MDN 的 JavaScript 分區中，這一部分被作爲 Javascript 的資料庫。閱讀<a href="/zh-TW/docs/Web/JavaScript/Reference/About">關於該參考</a>以了解更多。</p>

<h2 id="全域物件">全域物件</h2>

<p>本章節記錄了所有 <a href="/zh-TW/docs/Web/JavaScript/Reference/Global_Objects">JavaScript 標準內建物件</a> 以及其方法與屬性。</p>

<h3>數值屬性</h3>

<ul>
  <li>{{JSxRef("Infinity")}}</li>
  <li>{{JSxRef("NaN")}}</li>
  <li>{{JSxRef("undefined")}}</li>
  <li>{{JSxRef("globalThis")}}</li>
</ul>

<h3>函數屬性</h3>

<ul>
  <li>{{JSxRef("Global_Objects/eval", "eval()")}}</li>
  <li>{{JSxRef("Global_Objects/isFinite", "isFinite()")}}</li>
  <li>{{JSxRef("Global_Objects/isNaN", "isNaN()")}}</li>
  <li>{{JSxRef("Global_Objects/parseFloat", "parseFloat()")}}</li>
  <li>{{JSxRef("Global_Objects/parseInt", "parseInt()")}}</li>
  <li>{{JSxRef("Global_Objects/decodeURI", "decodeURI()")}}</li>
  <li>{{JSxRef("Global_Objects/decodeURIComponent", "decodeURIComponent()")}}</li>
  <li>{{JSxRef("Global_Objects/encodeURI", "encodeURI()")}}</li>
  <li>{{JSxRef("Global_Objects/encodeURIComponent", "encodeURIComponent()")}}</li>
</ul>

<h3>基礎物件</h3>

<ul>
  <li>{{JSxRef("Object")}}</li>
  <li>{{JSxRef("Function")}}</li>
  <li>{{JSxRef("Boolean")}}</li>
  <li>{{JSxRef("Symbol")}}</li>
</ul>

<h3>Error</h3>

<ul>
  <li>{{JSxRef("Error")}}</li>
  <li>{{JSxRef("AggregateError")}}</li>
  <li>{{JSxRef("EvalError")}}</li>
  <li>{{JSxRef("InternalError")}}</li>
  <li>{{JSxRef("RangeError")}}</li>
  <li>{{JSxRef("ReferenceError")}}</li>
  <li>{{JSxRef("SyntaxError")}}</li>
  <li>{{JSxRef("TypeError")}}</li>
  <li>{{JSxRef("URIError")}}</li>
</ul>

<h3>數字與日期</h3>

<ul>
  <li>{{JSxRef("Number")}}</li>
  <li>{{JSxRef("BigInt")}}</li>
  <li>{{JSxRef("Math")}}</li>
  <li>{{JSxRef("Date")}}</li>
</ul>

<h3>文字處理</h3>

<ul>
  <li>{{JSxRef("String")}}</li>
  <li>{{JSxRef("RegExp")}}</li>
</ul>

<h3>具索引的集合</h3>

<ul>
  <li>{{JSxRef("Array")}}</li>
  <li>{{JSxRef("Int8Array")}}</li>
  <li>{{JSxRef("Uint8Array")}}</li>
  <li>{{JSxRef("Uint8ClampedArray")}}</li>
  <li>{{JSxRef("Int16Array")}}</li>
  <li>{{JSxRef("Uint16Array")}}</li>
  <li>{{JSxRef("Int32Array")}}</li>
  <li>{{JSxRef("Uint32Array")}}</li>
  <li>{{JSxRef("Float32Array")}}</li>
  <li>{{JSxRef("Float64Array")}}</li>
  <li>{{JSxRef("BigInt64Array")}}</li>
  <li>{{JSxRef("BigUint64Array")}}</li>
</ul>

<h3>具鍵值的集合</h3>

<ul>
  <li>{{JSxRef("Map")}}</li>
  <li>{{JSxRef("Set")}}</li>
  <li>{{JSxRef("WeakMap")}}</li>
  <li>{{JSxRef("WeakSet")}}</li>
</ul>

<h3>結構化資料</h3>

<ul>
  <li>{{JSxRef("ArrayBuffer")}}</li>
  <li>{{JSxRef("SharedArrayBuffer")}}</li>
  <li>{{JSxRef("Atomics")}}</li>
  <li>{{JSxRef("DataView")}}</li>
  <li>{{JSxRef("JSON")}}</li>
</ul>

<h3>控制抽象化物件</h3>

<ul>
  <li>{{JSxRef("Promise")}}</li>
  <li>{{JSxRef("Generator")}}</li>
  <li>{{JSxRef("GeneratorFunction")}}</li>
  <li>{{JSxRef("AsyncFunction")}}</li>
</ul>

<h3>Reflection</h3>

<ul>
  <li>{{JSxRef("Reflect")}}</li>
  <li>{{JSxRef("Proxy")}}</li>
</ul>

<h3>國際化</h3>

<ul>
  <li>{{JSxRef("Intl")}}</li>
  <li>{{JSxRef("Global_Objects/Collator", "Intl.Collator")}}</li>
  <li>{{JSxRef("Global_Objects/DateTimeFormat", "Intl.DateTimeFormat")}}</li>
  <li>{{JSxRef("Global_Objects/ListFormat", "Intl.ListFormat")}}</li>
  <li>{{JSxRef("Global_Objects/NumberFormat", "Intl.NumberFormat")}}</li>
  <li>{{JSxRef("Global_Objects/PluralRules", "Intl.PluralRules")}}</li>
  <li>{{JSxRef("Global_Objects/RelativeTimeFormat", "Intl.RelativeTimeFormat")}}</li>
  <li>{{JSxRef("Global_Objects/Locale", "Intl.Locale")}}</li>
</ul>

<h3>WebAssembly</h3>

<ul>
  <li>{{JSxRef("WebAssembly")}}</li>
  <li>{{JSxRef("WebAssembly.Module")}}</li>
  <li>{{JSxRef("WebAssembly.Instance")}}</li>
  <li>{{JSxRef("WebAssembly.Memory")}}</li>
  <li>{{JSxRef("WebAssembly.Table")}}</li>
  <li>{{JSxRef("WebAssembly.CompileError")}}</li>
  <li>{{JSxRef("WebAssembly.LinkError")}}</li>
  <li>{{JSxRef("WebAssembly.RuntimeError")}}</li>
</ul>

<h2 id="敘述句">敘述句</h2>

<p>本章節記錄了所有 <a href="/zh-TW/docs/Web/JavaScript/Reference/Statements">JavaScript 敘述句與宣告</a>。</p>

<h3>流程控制</h3>

<ul>
  <li>{{jsxref("Statements/block", "Block")}}</li>
  <li>{{jsxref("Statements/break", "break")}}</li>
  <li>{{jsxref("Statements/continue", "continue")}}</li>
  <li>{{jsxref("Statements/Empty", "Empty")}}</li>
  <li>{{jsxref("Statements/if...else", "if...else")}}</li>
  <li>{{jsxref("Statements/switch", "switch")}}</li>
  <li>{{jsxref("Statements/throw", "throw")}}</li>
  <li>{{jsxref("Statements/try...catch", "try...catch")}}</li>
</ul>

<h3>宣告</h3>

<ul>
  <li>{{jsxref("Statements/var", "var")}}</li>
  <li>{{jsxref("Statements/let", "let")}}</li>
  <li>{{jsxref("Statements/const", "const")}}</li>
</ul>

<h3>函數與類別</h3>

<ul>
  <li>{{jsxref("Statements/function", "function")}}</li>
  <li>{{jsxref("Statements/function*", "function*")}}</li>
  <li>{{jsxref("Statements/async_function", "async function")}}</li>
  <li>{{jsxref("Statements/return", "return")}}</li>
  <li>{{jsxref("Statements/class", "class")}}</li>
</ul>

<h3>迭代</h3>

<ul>
  <li>{{jsxref("Statements/do...while", "do...while")}}</li>
  <li>{{jsxref("Statements/for", "for")}}</li>
  <li>{{jsxref("Statements/for_each...in", "for each...in")}}</li>
  <li>{{jsxref("Statements/for...in", "for...in")}}</li>
  <li>{{jsxref("Statements/for...of", "for...of")}}</li>
  <li>{{jsxref("Statements/for-await...of", "for await...of")}}</li>
  <li>{{jsxref("Statements/while", "while")}}</li>
</ul>

<h3>Other</h3>

<ul>
  <li>{{jsxref("Statements/debugger", "debugger")}}</li>
  <li>{{jsxref("Statements/import", "import")}}</li>
  <li>{{jsxref("Statements/label", "label")}}</li>
  <li>{{jsxref("Statements/with", "with")}}</li>
</ul>

<h2 id="表示法與運算子">表示法與運算子</h2>

<p>本章節記錄了所有 <a href="/zh-TW/docs/Web/JavaScript/Reference/Operators">JavaScript 表示法與運算子</a>。</p>

<h3>主要運算式</h3>

<ul>
  <li>{{JSxRef("Operators/this", "this")}}</li>
  <li>{{JSxRef("Operators/function", "function")}}</li>
  <li>{{JSxRef("Operators/class", "class")}}</li>
  <li>{{JSxRef("Operators/function*", "function*")}}</li>
  <li>{{JSxRef("Operators/yield", "yield")}}</li>
  <li>{{JSxRef("Operators/yield*", "yield*")}}</li>
  <li>{{JSxRef("Operators/async_function", "async function")}}</li>
  <li>{{JSxRef("Operators/await", "await")}}</li>
  <li>{{JSxRef("Global_Objects/Array", "[]")}}</li>
  <li>{{JSxRef("Operators/Object_initializer", "{}")}}</li>
  <li>{{JSxRef("Global_Objects/RegExp", "/ab+c/i")}}</li>
  <li>{{JSxRef("Operators/Grouping", "( )")}}</li>
  <li>{{JSxRef("null")}}</li>
</ul>

<h3>左手邊運算式</h3> 

<ul>
  <li>{{JSxRef("Operators/Property_accessors", "Property accessors", "", 1)}}</li>
  <li>{{JSxRef("Operators/new", "new")}}</li>
  <li>{{JSxRef("Operators/new%2Etarget", "new.target")}}</li>
  <li>{{JSxRef("Operators/super", "super")}}</li>
  <li>{{JSxRef("Operators/Spread_syntax", "...obj")}}</p></li>
</ul>

<h3>遞增與遞減</h3>

<ul>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "A++", "#Increment")}}</li>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "A--", "#Decrement")}}</li>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "++A", "#Increment")}}</li>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "--A", "#Decrement")}}</li>
</ul>

<h3>一元運算子</h3>

<ul>
  <li>{{JSxRef("Operators/delete", "delete")}}</li>
  <li>{{JSxRef("Operators/void", "void")}}</li>
  <li>{{JSxRef("Operators/typeof", "typeof")}}</li>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "+", "#Unary_plus")}}</li>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "-", "#Unary_negation")}}</li>
  <li>{{JSxRef("Operators/Bitwise_Operators", "~", "#Bitwise_NOT")}}</li>
  <li>{{JSxRef("Operators/Logical_Operators", "!", "#Logical_NOT")}}</li>
</ul>

<h3>算術運算子</h3>

<ul>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "+", "#Addition")}}</li>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "-", "#Subtraction")}}</li>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "/", "#Division")}}</li>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "*", "#Multiplication")}}</li>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "%", "#Remainder")}}</li>
  <li>{{JSxRef("Operators/Arithmetic_Operators", "**", "#Exponentiation")}}</li>
</ul>

<h3>關係運算子</h3>

<ul>
  <li>{{JSxRef("Operators/in", "in")}}</li>
  <li>{{JSxRef("Operators/instanceof", "instanceof")}}</li>
  <li>{{JSxRef("Operators/Comparison_Operators", "&lt;", "#Less_than_operator")}}</li>
  <li>{{JSxRef("Operators/Comparison_Operators", "&gt;", "#Greater_than_operator")}}</li>
  <li>{{JSxRef("Operators/Comparison_Operators", "&lt;=", "#Less_than_or_equal_operator")}}</li>
  <li>{{JSxRef("Operators/Comparison_Operators", "&gt;=", "#Greater_than_or_equal_operator")}}</li>
</ul>

<h3>相等運算子</h3>

<ul>
  <li>{{JSxRef("Operators/Comparison_Operators", "==", "#Equality")}}</li>
  <li>{{JSxRef("Operators/Comparison_Operators", "!=", "#Inequality")}}</li>
  <li>{{JSxRef("Operators/Comparison_Operators", "===", "#Identity")}}</li>
  <li>{{JSxRef("Operators/Comparison_Operators", "!==", "#Nonidentity")}}</li>
</ul>

<h3>位元移位運算子</h3>

<ul>
  <li>{{JSxRef("Operators/Bitwise_Operators", "&lt;&lt;", "#Left_shift")}}</li>
  <li>{{JSxRef("Operators/Bitwise_Operators", "&gt;&gt;", "#Right_shift")}}</li>
  <li>{{JSxRef("Operators/Bitwise_Operators", "&gt;&gt;&gt;", "#Unsigned_right_shift")}}</li>
</ul>

<h3>二元位元運算子</h3>

<ul>
  <ul>
    <li>{{JSxRef("Operators/Bitwise_Operators", "&amp;", "#Bitwise_AND")}}</li>
    <li>{{JSxRef("Operators/Bitwise_Operators", "|", "#Bitwise_OR")}}</li>
    <li>{{JSxRef("Operators/Bitwise_Operators", "^", "#Bitwise_XOR")}}</li></li>
  </ul>
</ul>

<h3>二元邏輯運算子</h3>

<ul>
  <li>{{JSxRef("Operators/Logical_Operators", "&amp;&amp;", "#Logical_AND")}}</li>
  <li>{{JSxRef("Operators/Logical_Operators", "||", "#Logical_OR")}}</li>
</ul>

<h3>條件(三元)運算子</h3>

<ul>
  <li>{{JSxRef("Operators/Conditional_Operator", "(condition ? ifTrue : ifFalse)")}}</li>
</ul>

<h3>賦值運算子</h3>

<ul>
  <li>{{JSxRef("Operators/Assignment_Operators", "=", "#Assignment")}}</li>
  <li>{{JSxRef("Operators/Assignment_Operators", "*=", "#Multiplication_assignment")}}</li>
  <li>{{JSxRef("Operators/Assignment_Operators", "/=", "#Division_assignment")}}</li>
  <li>{{JSxRef("Operators/Assignment_Operators", "%=", "#Remainder_assignment")}}</li>
  <li>{{JSxRef("Operators/Assignment_Operators", "+=", "#Addition_assignment")}}</li>
  <li>{{JSxRef("Operators/Assignment_Operators", "-=", "#Subtraction_assignment")}}</li>
  <li>{{JSxRef("Operators/Assignment_Operators", "&lt;&lt;=", "#Left_shift_assignment")}}</li>
  <li>{{JSxRef("Operators/Assignment_Operators", "&gt;&gt;=", "#Right_shift_assignment")}}</li>
  <li>{{JSxRef("Operators/Assignment_Operators", "&gt;&gt;&gt;=", "#Unsigned_right_shift_assignment")}}</li>
  <li>{{JSxRef("Operators/Assignment_Operators", "&amp;=", "#Bitwise_AND_assignment")}}</li>
  <li>{{JSxRef("Operators/Assignment_Operators", "^=", "#Bitwise_XOR_assignment")}}</li>
  <li>{{JSxRef("Operators/Assignment_Operators", "|=", "#Bitwise_OR_assignment")}}</li>
  <li>{{JSxRef("Operators/Destructuring_assignment", "[a, b] = [1, 2]")}}</li>
  <li>{{JSxRef("Operators/Destructuring_assignment", "{a, b} = {a:1, b:2}")}}</li>
</ul>


<h2 id="函數">函數</h2>

<p>本章節說明如何使用 <a href="/zh-TW/docs/Web/JavaScript/Reference/Functions">JavaScript 函數</a> 來開發您的應用程式。</p>

<ul>
 <li><a href="/zh-TW/docs/Web/JavaScript/Reference/Functions/arguments"><code>arguments</code></a></li>
 <li><a href="/zh-TW/docs/Web/JavaScript/Reference/Functions/Arrow_functions">Arrow functions</a></li>
 <li><a href="/zh-TW/docs/Web/JavaScript/Reference/Functions/Default_parameters">Default parameters</a></li>
 <li><a href="/zh-TW/docs/Web/JavaScript/Reference/Functions/rest_parameters">Rest parameters</a></li>
</ul>

<h2 id="其他參考頁面">其他參考頁面</h2>

<ul>
 <li><a href="/zh-TW/docs/Web/JavaScript/Reference/Lexical_grammar">Lexical grammar</a></li>
 <li><a href="/zh-TW/docs/Web/JavaScript/Data_structures">Data types and data structures</a></li>
 <li><a href="/zh-TW/docs/Web/JavaScript/Reference/Strict_mode">Strict mode</a></li>
 <li><a href="/zh-TW/docs/Web/JavaScript/Reference/Deprecated_and_obsolete_features">Deprecated features</a></li>
</ul>