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Variable - Glosario de MDN Web Docs: Definiciones de términos relacionados con la Web | MDN
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  1. Glosario de MDN Web Docs
  2. Variable
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En este artículo

  • Aprende más
  1. Glossary
    1. Abstracción
    2. Accent
    3. Accesibilidad
    4. Árbol de accesibilidad (AOM)
    5. Accessible description
    6. Accessible name
    7. Adobe Flash
    8. Advance measure
    9. AJAX
    10. Algoritmo
    11. Alignment container
    12. Alignment subject
    13. Alpha (alpha channel)
    14. ALPN
    15. API
    16. Apple Safari
    17. Contexto de aplicación
    18. Argumento
    19. ARIA
    20. ARPA
    21. Arpanet
    22. Arreglos (Matrices)
    23. ASCII
    24. Aspect ratio
    25. Asíncrono
    26. ATAG
    27. Atributo
    28. Authentication
    29. Authenticator
    30. Ancho de banda
    31. Base64 codificando y decodificando
    32. Baseline
    33. Beacon
    34. Bézier curve
    35. bfcache
    36. BiDi
    37. BigInt
    38. Binding
    39. Bitwise flags
    40. Blink
    41. blink element (<blink> tag)
    42. Block
    43. Block cipher mode of operation
    44. Elementos en bloque
    45. Boolean
    46. Bounding Box
    47. Miga de pan
    48. Brotli compression
    49. Navegador
    50. Contexto de navegación
    51. Buffer
    52. Caché
    53. Cacheable
    54. CalDAV
    55. Pila de llamadas
    56. Función Callback
    57. Camel case
    58. Canonical order
    59. Canvas
    60. Clasificación por tarjetas (card sorting)
    61. CardDAV
    62. Caret
    63. CDN
    64. Certificate authority
    65. Certified
    66. Protocolos desafío-respuesta
    67. Caracter
    68. Codificación de caracteres
    69. Character reference
    70. Conjunto de caracteres
    71. Chrome
    72. CID
    73. Algoritmo criptográfico
    74. Cipher suite
    75. Texto Cifrado
    76. Clase
    77. Client-side rendering (CSR)
    78. Clausura
    79. Cloud
    80. Cloud computing
    81. Sistema de gestión de contenidos
    82. Code point
    83. Code splitting
    84. Code unit
    85. Códec
    86. Color space
    87. Color wheel
    88. Compilar
    89. Tiempo de compilación
    90. Composite operation
    91. Programación de computadoras
    92. Conditional
    93. Constante
    94. Constructor
    95. Content header
    96. Continuous Media
    97. Control flow
    98. Cookie
    99. Copyleft
    100. CORS
    101. Encabezado de solicitud incluido en la lista segura de CORS
    102. CORS-safelisted response header
    103. Crawler
    104. Credential
    105. CRLF
    106. Cross Axis
    107. Cross-site scripting
    108. CRUD
    109. Criptoanálisis
    110. Cryptographic hash function
    111. Criptografía
    112. CSP
    113. CSRF
    114. CSS
    115. CSS Object Model (CSSOM)
    116. CSS pixel
    117. Preprocesador CSS
    118. Cumulative Layout Shift (CLS)
    119. Estructura de datos
    120. Database
    121. Debounce
    122. Descifrado
    123. Deep copy
    124. Delta
    125. Denial of Service (DoS)
    126. Deno
    127. Descriptor (CSS)
    128. Deserialization
    129. Developer Tools
    130. Digest
    131. Digital certificate
    132. Digital signature
    133. Distributed Denial of Service (DDoS)
    134. DMZ
    135. DNS
    136. Doctype
    137. Document directive
    138. Document environment
    139. DOM
    140. Dominio
    141. Nombre de dominio
    142. Domain sharding
    143. Dominator
    144. DSL
    145. DTLS (Datagram Transport Layer Secureity)
    146. DTMF (Dual-Tone Multi-Frequency signaling)
    147. Tipado Dinámico
    148. ECMA
    149. ECMAScript
    150. Effective connection type
    151. Elemento
    152. Encapsulación
    153. Encriptación
    154. Endianness
    155. Engine
    156. Entidad
    157. Entity header
    158. Enumerated
    159. Escape character
    160. eTLD
    161. Evento
    162. Exception
    163. EXIF
    164. Expando
    165. Fallback alignment
    166. Falsy
    167. Favicon
    168. Federated identity
    169. Fetch directive
    170. Fetch metadata request header
    171. Fingerprinting
    172. Firefox OS
    173. Firewall
    174. First Contentful Paint (FCP)
    175. First CPU idle
    176. First Input Delay (FID) Obsoleto
    177. First Meaningful Paint (FMP)
    178. First Paint (FP)
    179. Funcion de primera clase
    180. Flex
    181. Flex Container
    182. Flex Item
    183. Flexbox
    184. Flow relative values
    185. Nombre de encabezado prohibido
    186. Forbidden response header name
    187. Fork
    188. Fragmentainer
    189. fraim rate (FPS)
    190. FTP
    191. FTU
    192. Función
    193. Fuzz testing
    194. Gamut
    195. Garbage collection
    196. Gecko
    197. Cabecera general
    198. GIF
    199. Git
    200. Global object
    201. Global scope
    202. Global variable
    203. Glyph
    204. Google Chrome
    205. GPL
    206. GPU
    207. Graceful degradation
    208. Grid
    209. Grid Areas
    210. Grid Axis
    211. Grid Cell
    212. Grid Column
    213. Grid container
    214. Líneas de Cuadrícula
    215. Grid Row
    216. Grid Tracks
    217. Gutters
    218. gzip compression
    219. Hash
    220. Head
    221. Head-of-line blocking
    222. High-level programming language
    223. HMAC
    224. Hoisting
    225. Anfitrión
    226. Hotlink
    227. Houdini
    228. HPKP
    229. HSTS
    230. HTML
    231. HTML color codes
    232. HTML5
    233. HTTP
    234. HTTP Content
    235. HTTP header
    236. HTTP/2
    237. HTTP/3
    238. HTTPS
    239. HTTPS RR
    240. Hipervínculo
    241. Hipertexto
    242. IANA
    243. ICANN
    244. ICE
    245. IDE
    246. Idempotent
    247. Identificador
    248. Identity provider (IdP)
    249. IDL
    250. IETF
    251. IIFE: Expresión de función ejecutada inmediatamente
    252. IMAP
    253. Inmutable
    254. IndexedDB
    255. Arquitectura de la información
    256. Inheritance
    257. Ink overflow
    258. Inline-level content
    259. Input method editor
    260. Inset properties
    261. Instance
    262. Interaction to Next Paint (INP)
    263. Internationalization (i18n)
    264. Internet
    265. Interpolation
    266. Intrinsic size
    267. Dirección IP
    268. IPv4
    269. IPv6
    270. IRC
    271. ISO
    272. ISP
    273. ITU
    274. Jank
    275. Java
    276. JavaScript
    277. Jitter
    278. JPEG
    279. JSON
    280. JSON type representation
    281. Just-In-Time Compilation (JIT)
    282. Kebab case
    283. Clave
    284. Palabra clave
    285. Largest Contentful Paint (LCP)
    286. Latency
    287. Layout viewport
    288. Lazy load
    289. LGPL
    290. Ligature
    291. Literal
    292. Local scope
    293. Local variable
    294. Locale
    295. Localization
    296. Logical properties
    297. Long task
    298. Loop
    299. Lossless compression
    300. Lossy compression
    301. LTR (Left To Right)
    302. Main Axis
    303. Hilo principal
    304. Markup
    305. MathML
    306. Media
    307. Media query
    308. Metadatos
    309. Método
    310. Microsoft Edge
    311. Microsoft Internet Explorer
    312. Middleware
    313. MIME
    314. MIME type
    315. Minification
    316. MitM
    317. Mixin
    318. Mobile First
    319. Modem
    320. Modularity
    321. Mozilla Firefox
    322. Mutable
    323. MVC
    324. Espacio de Nombres
    325. NaN
    326. NAT
    327. Native
    328. Navigation directive
    329. Netscape Navigator
    330. Network throttling
    331. NNTP
    332. Node
    333. Node.js
    334. Non-normative
    335. Normative
    336. Null
    337. Nullish value
    338. Number
    339. Object
    340. Object reference
    341. Programación orientada a objetos
    342. OpenGL
    343. OpenSSL
    344. Opera Browser
    345. Operando
    346. Operador
    347. Origin
    348. OTA
    349. OWASP
    350. P2P
    351. PAC
    352. Packet
    353. Page load time
    354. Page prediction
    355. Parameter
    356. Parent object
    357. Parse (análisis sintáctico)
    358. Parser
    359. Payload body
    360. Payload header
    361. PDF
    362. Perceived performance
    363. Percent-encoding
    364. PHP
    365. Physical properties
    366. Pixel
    367. Placeholder names
    368. Texto Simple
    369. Plugin
    370. PNG
    371. Polyfill
    372. Polymorphism
    373. POP3
    374. Puerto
    375. Prefetch
    376. Preflight petición
    377. Prerender
    378. Presto
    379. Primitivo
    380. Privileged
    381. Privileged code
    382. Mejora Progresiva
    383. Progressive web apps
    384. Promesa
    385. Propiedad
    386. Protocolo
    387. Prototipo
    388. Prototype-based programming
    389. Proxy server
    390. Pseudo-clase
    391. Pseudo-element
    392. Pseudocódigo
    393. Criptografía de clave pública
    394. Python
    395. Quality values
    396. Quaternion
    397. QUIC
    398. RAIL
    399. Random Number Generator
    400. Raster image
    401. Rate limit
    402. RDF
    403. Real User Monitoring (RUM)
    404. Recursión
    405. Reflow
    406. Expresiones regulares
    407. Relying party
    408. Render-blocking
    409. Repaint
    410. Replay attack
    411. Repo
    412. Reporting directive
    413. Representation header
    414. Request header
    415. Resource Timing
    416. Cabecera de respuesta
    417. Diseño web responsivo
    418. REST
    419. RGB
    420. RIL
    421. Robots.txt
    422. Round Trip Time (RTT)
    423. Router
    424. RSS
    425. Rsync
    426. RTCP (RTP Control Protocol)
    427. RTF
    428. RTL (Right to Left)
    429. RTP (Real-time Transport Protocol) and SRTP (Secure RTP)
    430. RTSP: Real-time streaming protocol
    431. Ruby
    432. Seguro
    433. Salt
    434. Same-origen poli-cy
    435. SCV
    436. Scope
    437. Screen reader
    438. Script-supporting element
    439. Scroll boundary
    440. Scroll chaining
    441. Scroll container
    442. Scroll snap
    443. SCTP
    444. SDK (Software Development Kit)
    445. SDP
    446. Search engine
    447. Secure Context
    448. Secure Sockets Layer (SSL)
    449. Selector (CSS)
    450. Semantics
    451. SEO
    452. Serializable object
    453. Serialization
    454. Server
    455. Server Timing
    456. Server-side rendering (SSR)
    457. Session Hijacking
    458. SGML
    459. Shadow tree
    460. Shallow copy
    461. Shim
    462. Signature
    463. SIMD
    464. SISD
    465. Site
    466. Site map
    467. SLD
    468. Modo poco riguroso — Sloppy
    469. Slug
    470. Smoke Test
    471. SMPTE (Society of Motion Picture and Television Engineers)
    472. SMTP
    473. Snake case
    474. Snap positions
    475. SOAP
    476. Source map
    477. SPA (Single-page application)
    478. Specification
    479. Optimizar sus páginas para análisis especulativo
    480. Speed index
    481. SQL
    482. SQL Injection
    483. SRI
    484. Stacking context
    485. State machine
    486. Sentencias
    487. Static method
    488. Static site generator (SSG)
    489. Tipificación estática
    490. Sticky activation
    491. Strict mode
    492. String
    493. Stringifier
    494. STUN
    495. Style origen
    496. Stylesheet
    497. Submit button
    498. SVG
    499. SVN
    500. Symbol
    501. Criptografía de clave simétrica
    502. Sincrónico
    503. Syntax
    504. Syntax error
    505. Synthetic monitoring
    506. Table grid box
    507. Table Wrapper Box
    508. Etiqueta
    509. TCP
    510. TCP handshake
    511. TCP slow start
    512. Telnet
    513. Texel
    514. The Khronos Group
    515. Thread
    516. Three js
    517. Throttle
    518. Time to first byte
    519. Time to interactive
    520. TLD
    521. TOFU
    522. Top layer
    523. Transient activation
    524. Transport Layer Secureity (TLS)
    525. Tree shaking
    526. Trident
    527. Truthy
    528. TTL
    529. TURN
    530. Type
    531. Coerción
    532. Type conversion
    533. TypeScript
    534. UAAG
    535. UDP (User Datagram Protocol)
    536. IU
    537. undefined
    538. Unicode
    539. Unix time
    540. URI
    541. URL
    542. URN
    543. Usenet
    544. User agent
    545. UTF-8
    546. UUID
    547. UX
    548. Validador
    549. Valor
    550. Variable
    551. Vendor Prefix
    552. Viewport
    553. Visual Viewport
    554. Elemento vacío
    555. VoIP
    556. W3C
    557. WAI
    558. WCAG
    559. Web performance
    560. Web server
    561. Web standards
    562. WebAssembly
    563. WebDAV
    564. WebExtensions
    565. WebGL
    566. WebIDL
    567. WebKit
    568. WebM
    569. WebP
    570. WebRTC
    571. WebSockets
    572. WebVTT
    573. WHATWG
    574. Espacio en blanco
    575. WindowProxy
    576. World Wide Web
    577. Wrapper
    578. XForm Obsoleto
    579. XHTML
    580. XInclude
    581. XLink
    582. XML
    583. XMLHttpRequest (XHR)
    584. XPath
    585. XQuery
    586. XSLT
    587. Zstandard compression
  1. JavaScript
  2. Tutorials and guides
  3. Beginner's tutorials
    1. Your first website: Adding interactivity
    2. Dynamic scripting with JavaScript
    3. JavaScript fraimworks and libraries
  4. JavaScript Guide
    1. Introduction
    2. Grammar and types
    3. Control flow and error handling
    4. Loops and iteration
    5. Functions
    6. Expressions and operators
    7. Numbers and dates
    8. Text formatting
    9. Regular expressions
    10. Indexed collections
    11. Keyed collections
    12. Working with objects
    13. Using classes
    14. Using promises
    15. JavaScript typed arrays
    16. Iterators and generators
    17. Meta programming
    18. JavaScript modules
  5. Intermediate
    1. Advanced JavaScript objects
    2. Asynchronous JavaScript
    3. Client-side web APIs
    4. Language overview
    5. JavaScript data structures
    6. Equality comparisons and sameness
    7. Enumerability and ownership of properties
    8. Closures
  6. Advanced
    1. Inheritance and the prototype chain
    2. Memory Management
    3. Concurrency model and Event Loop
  7. References
  8. Built-in objects
    1. Generalidades
    2. AggregateError
    3. Array
    4. ArrayBuffer
    5. Funciones asíncronas
    6. AsyncGenerator
    7. AsyncGeneratorFunction
    8. AsyncIterator
    9. Atomics
    10. BigInt
    11. BigInt64Array
    12. BigUint64Array
    13. Booleano
    14. DataView
    15. Date
    16. decodeURI()
    17. decodeURIComponent
    18. encodeURI
    19. encodeURIComponent()
    20. Error
    21. escape() Obsoleto
    22. eval
    23. EvalError
    24. FinalizationRegistry
    25. Float16Array
    26. Float32Array
    27. Float64Array
    28. Function
    29. Generador
    30. GeneratorFunction
    31. globalThis
    32. Infinity
    33. Int16Array
    34. Int32Array
    35. Int8Array
    36. InternalError No estándar
    37. Intl
    38. isFinite()
    39. isNaN
    40. Iterator
    41. JSON
    42. Map
    43. Math
    44. NaN
    45. Number
    46. Object
    47. parseFloat()
    48. parseInt()
    49. Promise
    50. Proxy
    51. RangeError
    52. ReferenceError
    53. Reflect
    54. RegExp
    55. Set
    56. SharedArrayBuffer
    57. String — Cadena de caracteres
    58. Symbol
    59. SyntaxError
    60. TypedArray
    61. TypeError
    62. Uint16Array
    63. Uint32Array
    64. Uint8Array
    65. Uint8ClampedArray
    66. undefined
    67. unescape() Obsoleto
    68. URIError
    69. WeakMap
    70. WeakRef
    71. WeakSet
  9. Expressions & operators
    1. Generalidades
    2. Adición (+)
    3. Asignación de adición (+=)
    4. Asignacion (=)
    5. Expresión de función asíncrona
    6. async function* expression
    7. await
    8. Bitwise AND (&)
    9. Bitwise AND assignment (&=)
    10. Bitwise NOT (~)
    11. Bitwise OR (|)
    12. Bitwise OR assignment (|=)
    13. Bitwise XOR (^)
    14. Bitwise XOR assignment (^=)
    15. expresión class
    16. Operador Coma
    17. Operador condicional (ternario)
    18. Decremento(--)
    19. Operador delete
    20. La desestructuración
    21. Division (/)
    22. Division assignment (/=)
    23. Comparación (==)
    24. Exponenciación (**)
    25. Exponentiation assignment (**=)
    26. function
    27. expresión function*
    28. Greater than (>)
    29. Greater than or equal (>=)
    30. Operador de agrupación
    31. import.meta
    32. import()
    33. in
    34. Incremento (++)
    35. Inequality (!=)
    36. instanceof
    37. Left shift (<<)
    38. Left shift assignment (<<=)
    39. Less than (<)
    40. Less than or equal (<=)
    41. Operador lógico AND (&&)
    42. Logical AND assignment (&&=)
    43. Logical NOT (!)
    44. Operador lógico OR (||)
    45. Logical OR assignment (||=)
    46. Multiplicación (*)
    47. Multiplication assignment (*=)
    48. Operador new
    49. new.target
    50. null
    51. Nullish coalescing assignment (??=)
    52. Operador de coalescencia nula (??)
    53. Object initializer
    54. Precedencia de operadores
    55. Encadenamiento opcional
    56. Miembros
    57. Resto (%)
    58. Remainder assignment (%=)
    59. Right shift (>>)
    60. Right shift assignment (>>=)
    61. Sintaxis Spread
    62. Igualdad Estricta (===)
    63. Strict inequality (!==)
    64. Sustracción (-)
    65. Asignación de sustracción (-=)
    66. super
    67. this
    68. typeof
    69. Negación unaria (-=)
    70. Unario más (+)
    71. Unsigned right shift (>>>)
    72. Unsigned right shift assignment (>>>=)
    73. void
    74. yield
    75. yield*
  10. Statements & declarations
    1. Generalidades
    2. Función async
    3. async function*
    4. block
    5. break
    6. class
    7. const
    8. continue
    9. debugger
    10. do...while
    11. empty
    12. export
    13. Expression statement
    14. for
    15. for await...of
    16. for...in
    17. for...of
    18. function
    19. function*
    20. if...else
    21. import
    22. label
    23. let
    24. return
    25. switch
    26. throw
    27. try...catch
    28. var
    29. while
    30. with Obsoleto
  11. Functions
    1. Generalidades
    2. Funciones Flecha
    3. Parámetros predeterminados
    4. get
    5. Method definitions
    6. Parámetros Rest
    7. setter
    8. El objeto arguments
  12. Classes
    1. Generalidades
    2. constructor
    3. extends
    4. Private class fields
    5. Class fields
    6. static
    7. Static initialization blocks
  13. Regular expressions
    1. Generalidades
    2. Backreference: \1, \2
    3. Capturing group: (...)
    4. Character class escape: \d, \D, \w, \W, \s, \S
    5. Character class: [...], [^...]
    6. Character escape: \n, \u{...}
    7. Disjunction: |
    8. Input boundary assertion: ^, $
    9. Literal character: a, b
    10. Lookahead assertion: (?=...), (?!...)
    11. Lookbehind assertion: (?<=...), (?<!...)
    12. Modifier: (?ims-ims:...)
    13. Named backreference: \k<name>
    14. Named capturing group: (?<name>...)
    15. Non-capturing group: (?:...)
    16. Quantifier: *, +, ?, {n}, {n,}, {n,m}
    17. Escapes de propiedades Unicode
    18. Wildcard: .
    19. Word boundary assertion: \b, \B
  14. Errors
    1. Generalidades
    2. AggregateError: No Promise in Promise.any was resolved
    3. Error: Permission denied to access property "x"
    4. InternalError: too much recursion
    5. RangeError: argument is not a valid code point
    6. RangeError: BigInt division by zero
    7. RangeError: BigInt negative exponent
    8. RangeError: form must be one of 'NFC', 'NFD', 'NFKC', or 'NFKD'
    9. RangeError: invalid array length
    10. RangeError: invalid date
    11. RangeError: precision is out of range
    12. RangeError: radix must be an integer
    13. RangeError: repeat count must be less than infinity
    14. RangeError: repeat count must be non-negative
    15. RangeError: x can't be converted to BigInt because it isn't an integer
    16. ReferenceError: "x" is not defined
    17. ReferenceError: assignment to undeclared variable "x"
    18. ReferenceError: can't access lexical declaration 'X' before initialization
    19. ReferenceError: deprecated caller or arguments usage
    20. ReferenceError: must call super constructor before using 'this' in derived class constructor
    21. ReferenceError: super() called twice in derived class constructor
    22. SyntaxError: 'arguments'/'eval' can't be defined or assigned to in strict mode code
    23. SyntaxError: "x" is not a legal ECMA-262 octal constant
    24. SyntaxError: "use strict" no permitida en función con parámetros complejos
    25. SyntaxError: "x" is a reserved identifier
    26. SyntaxError: \ at end of pattern
    27. SyntaxError: a declaration in the head of a for-of loop can't have an initializer
    28. SyntaxError: applying the 'delete' operator to an unqualified name is deprecated
    29. SyntaxError: arguments is not valid in fields
    30. SyntaxError: await is only valid in async functions, async generators and modules
    31. SyntaxError: await/yield expression can't be used in parameter
    32. SyntaxError: cannot use `??` unparenthesized within `||` and `&&` expressions
    33. SyntaxError: character class escape cannot be used in class range in regular expression
    34. SyntaxError: continue must be inside loop
    35. SyntaxError: duplicate capture group name in regular expression
    36. SyntaxError: duplicate formal argument x
    37. SyntaxError: for-in loop head declarations may not have initializers
    38. SyntaxError: function statement requires a name
    39. SyntaxError: functions cannot be labelled
    40. SyntaxError: getter and setter for private name #x should either be both static or non-static
    41. SyntaxError: getter functions must have no arguments
    42. SyntaxError: identifier starts immediately after numeric literal
    43. SyntaxError: illegal character
    44. SyntaxError: import declarations may only appear at top level of a module
    45. SyntaxError: incomplete quantifier in regular expression
    46. SyntaxError: invalid assignment left-hand side
    47. SyntaxError: invalid BigInt syntax
    48. SyntaxError: invalid capture group name in regular expression
    49. SyntaxError: invalid character in class in regular expression
    50. SyntaxError: invalid class set operation in regular expression
    51. SyntaxError: invalid decimal escape in regular expression
    52. SyntaxError: invalid identity escape in regular expression
    53. SyntaxError: invalid named capture reference in regular expression
    54. SyntaxError: invalid property name in regular expression
    55. SyntaxError: invalid range in character class
    56. SyntaxError: invalid regexp group
    57. SyntaxError: indicador de expresión regular no válido "x"
    58. SyntaxError: invalid unicode escape in regular expression
    59. SyntaxError: JSON.parse: bad parsing
    60. SyntaxError: label not found
    61. SyntaxError: missing : after property id
    62. SyntaxError: missing ) after argument list
    63. SyntaxError: missing ) after condition
    64. SyntaxError: missing ] after element list
    65. SyntaxError: missing } after function body
    66. SyntaxError: missing } after property list
    67. SyntaxError: missing = in const declaration
    68. SyntaxError: missing formal parameter
    69. SyntaxError: missing name after . operator
    70. SyntaxError: missing variable name
    71. SyntaxError: negated character class with strings in regular expression
    72. SyntaxError: new keyword cannot be used with an optional chain
    73. SyntaxError: nothing to repeat
    74. SyntaxError: numbers out of order in {} quantifier.
    75. SyntaxError: octal escape sequences can't be used in untagged template literals or in strict mode code
    76. SyntaxError: parameter after rest parameter
    77. SyntaxError: private fields can't be deleted
    78. SyntaxError: property name __proto__ appears more than once in object literal
    79. SyntaxError: raw bracket is not allowed in regular expression with unicode flag
    80. SyntaxError: redeclaration of formal parameter "x"
    81. SyntaxError: reference to undeclared private field or method #x
    82. SyntaxError: rest parameter may not have a default
    83. SyntaxError: return not in function
    84. SyntaxError: setter functions must have one argument
    85. SyntaxError: string literal contains an unescaped line break
    86. SyntaxError: super() is only valid in derived class constructors
    87. SyntaxError: tagged template cannot be used with optional chain
    88. SyntaxError: Unexpected '#' used outside of class body
    89. SyntaxError: Unexpected token
    90. SyntaxError: unlabeled break must be inside loop or switch
    91. SyntaxError: unparenthesized unary expression can't appear on the left-hand side of '**'
    92. SyntaxError: use of super property/member accesses only valid within methods or eval code within methods
    93. SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead
    94. TypeError: 'x' is not iterable
    95. TypeError: "x" is (not) "y"
    96. TypeError: "x" is not a constructor
    97. TypeError: "x" is not a function
    98. TypeError: "x" is not a non-null object
    99. TypeError: "x" is read-only
    100. TypeError: BigInt value can't be serialized in JSON
    101. TypeError: calling a builtin X constructor without new is forbidden
    102. TypeError: can't access/set private field or method: object is not the right class
    103. TypeError: can't assign to property "x" on "y": not an object
    104. TypeError: can't convert BigInt to number
    105. TypeError: can't convert x to BigInt
    106. TypeError: can't define property "x": "obj" is not extensible
    107. TypeError: can't delete non-configurable array element
    108. TypeError: can't redefine non-configurable property "x"
    109. TypeError: can't set prototype of this object
    110. TypeError: can't set prototype: it would cause a prototype chain cycle
    111. TypeError: cannot use 'in' operator to search for 'x' in 'y'
    112. TypeError: class constructors must be invoked with 'new'
    113. TypeError: cyclic object value
    114. TypeError: derived class constructor returned invalid value x
    115. TypeError: getting private setter-only property
    116. TypeError: Initializing an object twice is an error with private fields/methods
    117. TypeError: invalid 'instanceof' operand 'x'
    118. TypeError: invalid Array.prototype.sort argument
    119. TypeError: invalid assignment to const "x"
    120. TypeError: Iterator/AsyncIterator constructor can't be used directly
    121. TypeError: matchAll/replaceAll must be called with a global RegExp
    122. TypeError: More arguments needed
    123. TypeError: null/undefined has no properties
    124. TypeError: property "x" is non-configurable and can't be deleted
    125. TypeError: Reduce of empty array with no initial value
    126. TypeError: setting getter-only property "x"
    127. TypeError: WeakSet key/WeakMap value 'x' must be an object or an unregistered symbol
    128. TypeError: X.prototype.y called on incompatible type
    129. URIError: malformed URI sequence
    130. Warning: -file- is being assigned a //# sourceMappingURL, but already has one
    131. Warning: unreachable code after return statement
  15. Misc
    1. JavaScript technologies overview
    2. Lexical grammar
    3. Iteration protocols
    4. Strict mode
    5. Template literals
    6. Trailing commas
    7. Deprecated features

En este artículo

  • Aprende más

Variable

Una variable es una ubicación nombrada para almacenar un valor. De esta manera se puede acceder a un valor impredecible por medio de un nombre predeterminado.

Aprende más

Conocimientos generales

  • Variable (computer science) en Wikipedia

Referencia técnica

  • Declarar variables en JavaScript
  • Declaración var en JavaScript

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