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  1. Tecnologia Web para desenvolvedores
  2. JavaScript
  3. Referência JavaScript
  4. Objetos Globais
  5. String
  6. String.prototype.toLowerCase()
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String.prototype.toLowerCase()

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 toLowerCase() retorna o valor da string que foi chamada convertido para minúsculo.

In this article

Sintaxe

str.toLowerCase()

Valor retornado

Uma nova string contendo o valor da string original convertido para minúsculo.

Descrição

O método toLowerCase() retorna o valor da string original convertido para minúsculo. toLowerCase() não altera o valor da string original.

Exemplos

Usando toLowerCase()

js
console.log("ALFABETO".toLowerCase()); // 'alfabeto'

Especificações

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

Enable JavaScript to view this browser compatibility table.

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  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

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