← 返回首页
String.prototype.toString() - 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.toString()
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.toString()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since julho de 2015.

O método toString() retorna uma string representando o objeto especificado.

In this article

Sintaxe

str.toString()

Descrição

O objeto String substitui o método toString() do objeto Object. Ele não herda Object.prototype.toString(). Para objetos String, o método toString() retorna uma representação de string do objeto e é o mesmo que o método String.prototype.valueOf().

Exemplos

Usando toString()

O exemplo a seguir exibe o valor string de um objeto String:

js
var x = new String("Hello world"); console.log(x.toString()); // retorna 'Hello world'

Especificações

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

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 8 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.