Definition and Usage
定义与用法

The slice() method extracts a part of a string and returns the extracted part in a new string.
slice()方法从一个字符串选取一部分字符，并将它们返回成一个新的字符串

Syntax
语法

stringObject.slice(start,end)

Tips and Notes
注意

Tip: You can use negative index numbers to select from the end of the string.
提示：你可以用一个负的起始值从字符串的末尾开始选取字符

Note: If end is not specified, slice() selects all characters from the specified start position and to the end of the string.
注意：如果没有指定结束的位置，slice()将选取从指定起始位置开始到字符串结束的所有字符

Example 1
实例1

In this example we will extract all characters from a string, starting at position 6:
在本例中，我们将选取字符串中第6个字符以后的所有字符：

<script type="text/javascript">

var str="Hello happy world!"
document.write(str.slice(6))

</script>

The output of the code above will be:
输出结果为：

happy world!

Example 2
实例2

In this example we will extract all the characters from position 6 to position 11:
在本例中，我们将从字符串中选取第6个字符到第11个字符间的字符：

<script type="text/javascript">

var str="Hello happy world!"
document.write(str.slice(6,11))

</script>

The output of the code above will be:
输出结果为：

happy

Try-It-Yourself Demos
互动演练

slice()
How to use slice() to extract characters from a string.
如何用slice()从字符串中选取字符

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