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JavaScript replace() 方法


出处:互联网   整理: 软晨网(RuanChen.com)   发布: 2009-03-04   浏览: 408 ::
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Definition and Usage
定义与用法

The replace() method is used to replace some characters with some other characters in a string.
replace()方法用于将字符串中的一些字符替换成其他字符

Syntax
语法

stringObject.replace(findstring,newstring)

 

Parameter
参数
Description
注释
findstring
目标字符串
Required. Specifies a string value to find. To perform a global search add a 'g' flag to this parameter and to perform a case-insensitive search add an 'i' flag
必选项。指定所要替换的字符串。要执行多次匹配需要添加一个”g“标记。要指定模糊匹配需要添加一个”i“标记
newstring
新字符串
Required. Specifies the string to replace the found value from findstring
必选项。指定所要替换的字符串的新值

 


Tips and Notes
注意

Note: The replace() method is case sensitive.
注意:replace()方法是精确匹配的


Example 1 - Standard Replace
实例 1 -  标准替换

In the following example we will replace the word Microsoft with RuanChen:
在下面的例子中,我们将把Microsoft替换成RuanChen:

<script type="text/javascript">
var str="这里是Micosoft!"
document.write(str.replace(/Microsoft/, "RuanChen"))
</script>

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

这里是RuanChen!

Note: In the following example the word Microsoft will not be replaced (because the replace() method is case sensitive):
注意:在下面的例子中,Microsoft将不会被替换(replace()方法是精确匹配的)

<script type="text/javascript">
var str="这里是Microsoft!"
document.write(str.replace(/microsoft/, "RuanChen"))
</script>

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

这里是Microsoft!

 


Example 2 - Case-insensitive Search
实例 2 - 模糊匹配

In the following example we will perform a case-insensitive search, and the word Microsoft will be replaced:
在下面的例子中,我们将演示一个模糊匹配,Microsoft将会被替换:

<script type="text/javascript">
var str="这里是Microsoft!"
document.write(str.replace(/microsoft/i, "RuanChen"))
</script>

The output of the code above will be:
返回结果为:

这里是RuanChen!

 


Example 3 - Global Search
实例3 - 多次匹配

In the following example we will perform a global match, and the word Microsoft will be replaced each time it is found:
在下面的例子中,我们将演示一个多次匹配:

<script type="text/javascript">
var str="欢迎来到Microsoft! "
str=str + "Microsoft将为你提供全面的技术支持"
document.write(str.replace(/Microsoft/g, "RuanChen"))
</script>

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

欢迎来到RuanChen! RuanChen将为你提供全面的技术支持

 


Example 4 - Global and Case-insensitive Search
实例 4 - 多次模糊匹配

In the following example we will perform a global and case-insensitive match, and the word Microsoft will be replaced each time it is found, independent of upper and lower case characters:
在下面的例子中,我们将演示多次模糊匹配:

<script type="text/javascript">
var str="欢迎来到Microsoft! "
str=str + "Microsoft将为你提供全面的技术支持"
document.write(str.replace(/microsoft/gi, "RuanChen"))
</script>

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

欢迎来到RuanChen! RuanChen将为你提供全面的技术支持

 


Try-It-Yourself Demos
互动演练

replace()
How to use replace() to replace some characters in a string.
如何用replace()来替换字符串中的字符

replace() Case-insensitive search
How to use replace() with the 'i' flag to replace some characters in a string.
如何用replace()和"i"标记来模糊替换字符串中的字符

replace() Global search
How to use replace() with the 'g' flag to replace some characters in a string.
如何用replace()和”g“标记来多次替换字符串中的字符

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