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Interface String

Hierarchy

  • String

Indexable

[index: number]: string

Index

Properties

Methods

Properties

length

length: number

Returns the length of a String object.

Methods

charAt

  • charAt(pos: number): string

  • Returns the character at the specified index.

    Parameters

    • pos: number

      The zero-based index of the desired character.

    Returns string

charCodeAt

  • charCodeAt(index: number): number

  • Returns the Unicode value of the character at the specified location.

    Parameters

    • index: number

      The zero-based index of the desired character. If there is no character at the specified index, NaN is returned.

    Returns number

concat

  • concat(...strings: string[]): string

  • Returns a string that contains the concatenation of two or more strings.

    Parameters

    • Rest ...strings: string[]

      The strings to append to the end of the string.

    Returns string

indexOf

  • indexOf(searchString: string, position?: number): number

  • Returns the position of the first occurrence of a substring.

    Parameters

    • searchString: string

      The substring to search for in the string

    • Optional position: number

      The index at which to begin searching the String object. If omitted, search starts at the beginning of the string.

    Returns number

lastIndexOf

  • lastIndexOf(searchString: string, position?: number): number

  • Returns the last occurrence of a substring in the string.

    Parameters

    • searchString: string

      The substring to search for.

    • Optional position: number

      The index at which to begin searching. If omitted, the search begins at the end of the string.

    Returns number

localeCompare

  • localeCompare(that: string): number
  • localeCompare(that: string, locales?: string | string[], options?: CollatorOptions): number

  • Determines whether two strings are equivalent in the current locale.

    Parameters

    • that: string

      String to compare to target string

    Returns number

  • Determines whether two strings are equivalent in the current or specified locale.

    Parameters

    • that: string

      String to compare to target string

    • Optional locales: string | string[]

      A locale string or array of locale strings that contain one or more language or locale tags. If you include more than one locale string, list them in descending order of priority so that the first entry is the preferred locale. If you omit this parameter, the default locale of the JavaScript runtime is used. This parameter must conform to BCP 47 standards; see the Intl.Collator object for details.

    • Optional options: CollatorOptions

      An object that contains one or more properties that specify comparison options. see the Intl.Collator object for details.

    Returns number

match

  • match(regexp: string | RegExp): RegExpMatchArray | null

  • Matches a string with a regular expression, and returns an array containing the results of that search.

    Parameters

    • regexp: string | RegExp

      A variable name or string literal containing the regular expression pattern and flags.

    Returns RegExpMatchArray | null

replace

  • replace(searchValue: string | RegExp, replaceValue: string): string
  • replace(searchValue: string | RegExp, replacer: function): string

  • Replaces text in a string, using a regular expression or search string.

    Parameters

    • searchValue: string | RegExp

      A string to search for.

    • replaceValue: string

      A string containing the text to replace for every successful match of searchValue in this string.

    Returns string

  • Replaces text in a string, using a regular expression or search string.

    Parameters

    • searchValue: string | RegExp

      A string to search for.

    • replacer: function

      A function that returns the replacement text.

        • (substring: string, ...args: any[]): string

        • Parameters

          • substring: string
          • Rest ...args: any[]

          Returns string

    Returns string

search

  • search(regexp: string | RegExp): number

  • Finds the first substring match in a regular expression search.

    Parameters

    • regexp: string | RegExp

      The regular expression pattern and applicable flags.

    Returns number

slice

  • slice(start?: number, end?: number): string

  • Returns a section of a string.

    Parameters

    • Optional start: number

      The index to the beginning of the specified portion of stringObj.

    • Optional end: number

      The index to the end of the specified portion of stringObj. The substring includes the characters up to, but not including, the character indicated by end. If this value is not specified, the substring continues to the end of stringObj.

    Returns string

split

  • split(separator: string | RegExp, limit?: number): string[]

  • Split a string into substrings using the specified separator and return them as an array.

    Parameters

    • separator: string | RegExp

      A string that identifies character or characters to use in separating the string. If omitted, a single-element array containing the entire string is returned.

    • Optional limit: number

      A value used to limit the number of elements returned in the array.

    Returns string[]

substr

  • substr(from: number, length?: number): string

  • Gets a substring beginning at the specified location and having the specified length.

    Parameters

    • from: number

      The starting position of the desired substring. The index of the first character in the string is zero.

    • Optional length: number

      The number of characters to include in the returned substring.

    Returns string

substring

  • substring(start: number, end?: number): string

  • Returns the substring at the specified location within a String object.

    Parameters

    • start: number

      The zero-based index number indicating the beginning of the substring.

    • Optional end: number

      Zero-based index number indicating the end of the substring. The substring includes the characters up to, but not including, the character indicated by end. If end is omitted, the characters from start through the end of the original string are returned.

    Returns string

toLocaleLowerCase

  • toLocaleLowerCase(locales?: string | string[]): string

  • Converts all alphabetic characters to lowercase, taking into account the host environment's current locale.

    Parameters

    • Optional locales: string | string[]

    Returns string

toLocaleUpperCase

  • toLocaleUpperCase(locales?: string | string[]): string

  • Returns a string where all alphabetic characters have been converted to uppercase, taking into account the host environment's current locale.

    Parameters

    • Optional locales: string | string[]

    Returns string

toLowerCase

  • toLowerCase(): string

  • Converts all the alphabetic characters in a string to lowercase.

    Returns string

toString

  • toString(): string

  • Returns a string representation of a string.

    Returns string

toUpperCase

  • toUpperCase(): string

  • Converts all the alphabetic characters in a string to uppercase.

    Returns string

trim

  • trim(): string

  • Removes the leading and trailing white space and line terminator characters from a string.

    Returns string

valueOf

  • valueOf(): string

  • Returns the primitive value of the specified object.

    Returns string

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