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    String.prototype

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    概览

    The String.prototype property represents the String prototype object.

    String.prototype 属性的属性特性:
    writable false
    enumerable false
    configurable false

    描述

    All String instances inherit from String.prototype. Changes to the String prototype object are propagated to all String instances.

    属性

    String.prototype.constructor
    Specifies the function that creates an object's prototype.
    String.prototype.length
    Reflects the length of the string.
    N
    Used to access the character in the Nth position where N is a positive integer between 0 and one less than the value of length. These properties are read-only.
    Properties inherited from Object:

    方法

    Methods unrelated to HTML

    String.prototype.charAt()
    Returns the character at the specified index.
    String.prototype.charCodeAt()
    Returns a number indicating the Unicode value of the character at the given index.
    String.prototype.codePointAt()
    Returns a non-negative integer that is the UTF-16 encoded code point value at the given position.
    String.prototype.concat()
    Combines the text of two strings and returns a new string.
    String.prototype.contains()
    Determines whether one string may be found within another string.
    String.prototype.endsWith()
    Determines whether a string ends with the characters of another string.
    String.prototype.indexOf()
    Returns the index within the calling String object of the first occurrence of the specified value, or -1 if not found.
    String.prototype.lastIndexOf()
    Returns the index within the calling String object of the last occurrence of the specified value, or -1 if not found.
    String.prototype.localeCompare()
    Returns a number indicating whether a reference string comes before or after or is the same as the given string in sort order.
    String.prototype.match()
    Used to match a regular expression against a string.
    String.prototype.normalize()
    Returns the Unicode Normalization Form of the calling string value.
    String.prototype.quote()
    Wraps the string in double quotes (""").
    String.prototype.repeat()
    Returns a string consisting of the elements of the object repeated the given times.
    String.prototype.replace()
    Used to find a match between a regular expression and a string, and to replace the matched substring with a new substring.
    String.prototype.search()
    Executes the search for a match between a regular expression and a specified string.
    String.prototype.slice()
    Extracts a section of a string and returns a new string.
    String.prototype.split()
    Splits a String object into an array of strings by separating the string into substrings.
    String.prototype.startsWith()
    Determines whether a string begins with the characters of another string.
    String.prototype.substr()
    Returns the characters in a string beginning at the specified location through the specified number of characters.
    String.prototype.substring()
    Returns the characters in a string between two indexes into the string.
    String.prototype.toLocaleLowerCase()
    The characters within a string are converted to lower case while respecting the current locale. For most languages, this will return the same as toLowerCase.
    String.prototype.toLocaleUpperCase()
    The characters within a string are converted to upper case while respecting the current locale. For most languages, this will return the same as toUpperCase.
    String.prototype.toLowerCase()
    Returns the calling string value converted to lower case.
    String.prototype.toSource()
    Returns an object literal representing the specified object; you can use this value to create a new object. Overrides the Object.prototype.toSource method.
    String.prototype.toString()
    Returns a string representing the specified object. Overrides the Object.prototype.toString method.
    String.prototype.toUpperCase()
    Returns the calling string value converted to uppercase.
    String.prototype.trim()
    Trims whitespace from the beginning and end of the string. Part of the ECMAScript 5 standard.
    String.prototype.trimLeft()
    Trims whitespace from the left side of the string.
    String.prototype.trimRight()
    Trims whitespace from the right side of the string.
    String.prototype.valueOf()
    Returns the primitive value of the specified object. Overrides the Object.prototype.valueOf method.

    HTML wrapper methods

    These methods are of limited use, as they provide only a subset of the available HTML tags and attributes.

    String.prototype.anchor()
    <a name="name"> (hypertext target)
    String.prototype.big()
    <big>
    String.prototype.blink()
    <blink>
    String.prototype.bold()
    <b>
    String.prototype.fixed()
    <tt>
    String.prototype.fontcolor()
    <font color="color">
    String.prototype.fontsize()
    <font size="size">
    String.prototype.italics()
    <i>
    String.prototype.link()
    <a href="url"> (link to URL)
    String.prototype.small()
    <small>
    String.prototype.strike()
    <strike>
    String.prototype.sub()
    <sub>
    String.prototype.sup()
    <sup>

    Specifications

    Specification Status Comment
    ECMAScript 1st Edition. Standard Initial definition.
    ECMAScript 5.1 (ECMA-262)
    String.prototype
    Standard  
    ECMAScript 6 (ECMA-262)
    String.prototype
    Release Candidate  

    浏览器兼容性

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

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