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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. Clickjacking
    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
    126. Deno
    127. Descriptor (CSS)
    128. Deserialization
    129. Developer Tools
    130. Digest
    131. Digital certificate
    132. Digital signature
    133. Distributed Denial of Service
    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. DoS attack
    145. DSL
    146. DTLS (Datagram Transport Layer Security)
    147. DTMF (Dual-Tone Multi-Frequency signaling)
    148. Tipado Dinámico
    149. ECMA
    150. ECMAScript
    151. Effective connection type
    152. Elemento
    153. Encapsulación
    154. Encriptación
    155. Endianness
    156. Engine
    157. Entidad
    158. Entity header
    159. Enumerated
    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
    175. First CPU idle
    176. First input delay
    177. First Meaningful Paint
    178. First paint
    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. frame 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. High-level programming language
    222. HMAC
    223. Hoisting
    224. Anfitrión
    225. Hotlink
    226. Houdini
    227. HPKP
    228. HSTS
    229. HTML
    230. HTML color codes
    231. HTML5
    232. HTTP
    233. HTTP Content
    234. HTTP header
    235. HTTP/2
    236. HTTP/3
    237. HTTPS
    238. HTTPS RR
    239. Hipervínculo
    240. Hipertexto
    241. IANA
    242. ICANN
    243. ICE
    244. IDE
    245. Idempotent
    246. Identificador
    247. Identity provider (IdP)
    248. IDL
    249. IETF
    250. IIFE: Expresión de función ejecutada inmediatamente
    251. IMAP
    252. Inmutable
    253. IndexedDB
    254. Arquitectura de la información
    255. Inheritance
    256. Ink overflow
    257. Inline-level content
    258. Input method editor
    259. Inset properties
    260. Instance
    261. Internationalization (i18n)
    262. Internet
    263. Interpolation
    264. Intrinsic size
    265. Dirección IP
    266. IPv4
    267. IPv6
    268. IRC
    269. ISO
    270. ISP
    271. ITU
    272. Jank
    273. Java
    274. JavaScript
    275. Jitter
    276. JPEG
    277. JSON
    278. JSON type representation
    279. Kebab case
    280. Clave
    281. Palabra clave
    282. Largest contentful paint
    283. Latency
    284. Layout viewport
    285. Lazy load
    286. LGPL
    287. Ligature
    288. Literal
    289. Local scope
    290. Local variable
    291. Locale
    292. Localization
    293. Logical properties
    294. Long task
    295. Loop
    296. Lossless compression
    297. Lossy compression
    298. LTR (Left To Right)
    299. Main Axis
    300. Hilo principal
    301. Markup
    302. MathML
    303. Media
    304. Media query
    305. Metadatos
    306. Método
    307. Microsoft Edge
    308. Microsoft Internet Explorer
    309. Middleware
    310. MIME
    311. MIME type
    312. Minification
    313. MitM
    314. Mixin
    315. Mobile First
    316. Modem
    317. Modularity
    318. Mozilla Firefox
    319. Mutable
    320. MVC
    321. Espacio de Nombres
    322. NaN
    323. NAT
    324. Native
    325. Navigation directive
    326. Netscape Navigator
    327. Network throttling
    328. NNTP
    329. Node
    330. Node.js
    331. Non-normative
    332. Normative
    333. Null
    334. Nullish value
    335. Number
    336. Object
    337. Object reference
    338. Programación orientada a objetos
    339. OpenGL
    340. OpenSSL
    341. Opera Browser
    342. Operando
    343. Operador
    344. Origin
    345. OTA
    346. OWASP
    347. P2P
    348. PAC
    349. Packet
    350. Page load time
    351. Page prediction
    352. Parameter
    353. Parent object
    354. Parse (análisis sintáctico)
    355. Parser
    356. Payload body
    357. Payload header
    358. PDF
    359. Perceived performance
    360. Percent-encoding
    361. PHP
    362. Physical properties
    363. Pixel
    364. Placeholder names
    365. Texto Simple
    366. Plugin
    367. PNG
    368. Polyfill
    369. Polymorphism
    370. POP3
    371. Puerto
    372. Prefetch
    373. Preflight petición
    374. Prerender
    375. Presto
    376. Primitivo
    377. Privileged
    378. Privileged code
    379. Mejora Progresiva
    380. Progressive web apps
    381. Promesa
    382. Propiedad
    383. Protocolo
    384. Prototipo
    385. Prototype-based programming
    386. Proxy server
    387. Pseudo-clase
    388. Pseudo-element
    389. Pseudocódigo
    390. Criptografía de clave pública
    391. Python
    392. Quality values
    393. Quaternion
    394. QUIC
    395. RAIL
    396. Random Number Generator
    397. Raster image
    398. Rate limit
    399. RDF
    400. Real User Monitoring (RUM)
    401. Recursión
    402. Reflow
    403. Expresiones regulares
    404. Relying party
    405. Render-blocking
    406. Repaint
    407. Replay attack
    408. Repo
    409. Reporting directive
    410. Representation header
    411. Request header
    412. Resource Timing
    413. Cabecera de respuesta
    414. Diseño web responsivo
    415. REST
    416. RGB
    417. RIL
    418. Robots.txt
    419. Round Trip Time (RTT)
    420. Router
    421. RSS
    422. Rsync
    423. RTCP (RTP Control Protocol)
    424. RTF
    425. RTL (Right to Left)
    426. RTP (Real-time Transport Protocol) and SRTP (Secure RTP)
    427. RTSP: Real-time streaming protocol
    428. Ruby
    429. Seguro
    430. Salt
    431. Same-origin policy
    432. SCV
    433. Scope
    434. Screen reader
    435. Script-supporting element
    436. Scroll boundary
    437. Scroll chaining
    438. Scroll container
    439. Scroll snap
    440. SCTP
    441. SDK (Software Development Kit)
    442. SDP
    443. Search engine
    444. Secure Context
    445. Secure Sockets Layer (SSL)
    446. Selector (CSS)
    447. Self-Executing Anonymous Function
    448. Semantics
    449. SEO
    450. Serializable object
    451. Serialization
    452. Server
    453. Server Timing
    454. Session Hijacking
    455. SGML
    456. Shadow tree
    457. Shallow copy
    458. Shim
    459. Signature
    460. SIMD
    461. SISD
    462. Site
    463. Site map
    464. SLD
    465. Modo poco riguroso — Sloppy
    466. Slug
    467. Smoke Test
    468. SMPTE (Society of Motion Picture and Television Engineers)
    469. SMTP
    470. Snake case
    471. Snap positions
    472. SOAP
    473. SPA (Single-page application)
    474. Specification
    475. Optimizar sus páginas para análisis especulativo
    476. Speed index
    477. SQL
    478. SQL Injection
    479. SRI
    480. Stacking context
    481. State machine
    482. Sentencias
    483. Static method
    484. Static site generator (SSG)
    485. Tipificación estática
    486. Sticky activation
    487. Strict mode
    488. String
    489. Stringifier
    490. STUN
    491. Style origin
    492. Stylesheet
    493. Submit button
    494. SVG
    495. SVN
    496. Symbol
    497. Criptografía de clave simétrica
    498. Sincrónico
    499. Syntax
    500. Syntax error
    501. Synthetic monitoring
    502. Table grid box
    503. Table Wrapper Box
    504. Etiqueta
    505. TCP
    506. TCP handshake
    507. TCP slow start
    508. Telnet
    509. Texel
    510. The Khronos Group
    511. Thread
    512. Three js
    513. Throttle
    514. Time to first byte
    515. Time to interactive
    516. TLD
    517. TOFU
    518. Top layer
    519. Transient activation
    520. Transport Layer Security (TLS)
    521. Tree shaking
    522. Trident
    523. Truthy
    524. TTL
    525. TURN
    526. Type
    527. Coerción
    528. Type conversion
    529. TypeScript
    530. UAAG
    531. UDP (User Datagram Protocol)
    532. IU
    533. undefined
    534. Unicode
    535. Unix time
    536. URI
    537. URL
    538. URN
    539. Usenet
    540. User agent
    541. UTF-8
    542. UUID
    543. UX
    544. Validador
    545. Valor
    546. Variable
    547. Vendor Prefix
    548. Viewport
    549. Visual Viewport
    550. Elemento vacío
    551. VoIP
    552. W3C
    553. WAI
    554. WCAG
    555. Web performance
    556. Web server
    557. Web standards
    558. WebAssembly
    559. WebDAV
    560. WebExtensions
    561. WebGL
    562. WebIDL
    563. WebKit
    564. WebM
    565. WebP
    566. WebRTC
    567. WebSockets
    568. WebVTT
    569. WHATWG
    570. Espacio en blanco
    571. WindowProxy
    572. World Wide Web
    573. Wrapper
    574. XForm Obsoleto
    575. XHTML
    576. XInclude
    577. XLink
    578. XML
    579. XMLHttpRequest (XHR)
    580. XPath
    581. XQuery
    582. XSLT
    583. Zstandard compression
  1. JavaScript
  2. Tutorials
  3. Complete beginners
    1. JavaScript basics
    2. JavaScript first steps
    3. JavaScript building blocks
    4. Introducing JavaScript objects
  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. Client-side JavaScript frameworks
    2. Client-side web APIs
    3. Language overview
    4. JavaScript data structures
    5. Equality comparisons and sameness
    6. Enumerability and ownership of properties
    7. 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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