← 返回首页
String.prototype.sub() - JavaScript | MDN
HTML

HTML: Markup language

HTML reference HTML guides Markup languages
CSS

CSS: Styling language

CSS reference CSS guides Layout cookbook
JavaScriptJS

JavaScript: Scripting language

JS reference JS guides
Web APIs

Web APIs: Programming interfaces

Web API reference Web API guides
All

All web technology

Technologies Topics
Learn

Learn web development

Frontend developer course Learn HTML Learn CSS Learn JavaScript
Tools

Discover our tools

About

Get to know MDN better

Blog
Toggle sidebar
  1. Tecnologia Web para desenvolvedores
  2. JavaScript
  3. Referência JavaScript
  4. Objetos Globais
  5. String
  6. String.prototype.sub()
Theme
  • OS default
  • Light
  • Dark
Português (do Brasil)
Remember language Learn more

Esta página foi traduzida do inglês pela comunidade. Saiba mais e junte-se à comunidade MDN Web Docs.

View in English Always switch to English

String.prototype.sub()

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

O método sub() cria um elemento HTML <sub> que faz com que uma string seja exibida como subscrito (texto pequeno).

In this article

Sintaxe

str.sub()

Valor retornado

Uma string contendo um elemento HTML <sub>.

Descrição

O método sub() cria uma string dentro de uma tag <sub>: "<sub>str</sub>".

Exemplos

Usando os métodos sub() e sup()

Os exemplos seguintes usam o métodos sub() e sup() para formatar uma string:

js
var superText = "superscript"; var subText = "subscript"; console.log("This is what a " + superText.sup() + " looks like."); // This is what a <sup>superscript</sup> looks like console.log("This is what a " + subText.sub() + " looks like."); // This is what a <sub>subscript</sub> looks like.

Especificações

Specification
ECMAScript® 2027 Language Specification
# sec-string.prototype.sub

Enable JavaScript to view this browser compatibility table.

Veja também

Help improve MDN

Was this page helpful to you?
Yes No
Learn how to contribute

This page was last modified on 9 de nov. de 2023 by MDN contributors.

View this page on GitHub • Report a problem with this content
  1. Objetos Globais
  2. String
  3. Construtor
    1. String()
  4. Métodos estáticos
    1. String.fromCharCode()
    2. String.fromCodePoint()
    3. String.raw()
  5. Métodos de instância
    1. String.prototype.anchor()
    2. at()
    3. String.prototype.big()
    4. String.prototype.blink()
    5. String.prototype.bold()
    6. String.prototype.charAt()
    7. String.prototype.charCodeAt()
    8. String.prototype.codePointAt()
    9. String.prototype.concat()
    10. String.prototype.endsWith()
    11. String.prototype.fixed()
    12. String.prototype.fontcolor()
    13. String.prototype.fontsize()
    14. String.prototype.includes()
    15. String.prototype.indexOf()
    16. isWellFormed()
    17. String.prototype.italics()
    18. String.prototype.lastIndexOf()
    19. String.prototype.link()
    20. String.prototype.localeCompare()
    21. String.prototype.match()
    22. String.prototype.matchAll()
    23. String.prototype.normalize()
    24. String.prototype.padEnd()
    25. String.prototype.padStart()
    26. String.prototype.repeat()
    27. String.prototype.replace()
    28. String.prototype.replaceAll()
    29. String.prototype.search()
    30. String.prototype.slice()
    31. String.prototype.small()
    32. String.prototype.split()
    33. String.prototype.startsWith()
    34. String.prototype.strike()
    35. String.prototype.sub()
    36. String.prototype.substr()
    37. String.prototype.substring()
    38. String.prototype.sup()
    39. String.prototype.toLocaleLowerCase()
    40. String.prototype.toLocaleUpperCase()
    41. String.prototype.toLowerCase()
    42. String.prototype.toString()
    43. String.prototype.toUpperCase()
    44. toWellFormed()
    45. String.prototype.trim()
    46. String.prototype.trimEnd()
    47. String.prototype.trimStart()
    48. String.prototype.valueOf()
    49. String.prototype[@@iterator]()
  6. Propriedades de instância
    1. String.length
  7. Herança
  8. Object/Function
  9. Métodos estáticos
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toString()
    5. [Symbol.hasInstance]()
  10. Propriedades estáticas
    1. Function.displayName
    2. Function.length
    3. Function.name
    4. prototype
    5. Function.arguments
    6. Function.caller
  11. Métodos de instância
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toString()
    10. Object.prototype.valueOf()
  12. Propriedades de instância
    1. Object.prototype.__proto__
    2. Object.prototype.constructor

Your blueprint for a better internet.

MDN Contribute Developers

Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation.
Portions of this content are ©1998–2026 by individual mozilla.org contributors. Content available under a Creative Commons license.