JavaScript replace () method
Examples
In this example, we will implement a global replacement, whenever the "Microsoft" is found, it is replaced by "W3CSchool":
var str="Visit Microsoft!";
var n=str.replace("Microsoft","W3CSchool");
var n=str.replace("Microsoft","W3CSchool");
n output:
Visit W3Schools!
try it"
Definition and Usage
replace () method is used to replace some characters and some characters or replace a regular expression matching substring in the string with.
If you want to know more please see the regular expression tutorial site: the RegExp tutorials and Our the RegExp Object Reference .
This method does not change the original string.
Browser Support
All major browsers support replace () method.
grammar
string.replace(searchvalue,newvalue)
Parameter Value
| 参数 | 描述 |
|---|---|
| searchvalue | 必须。规定子字符串或要替换的模式的 RegExp 对象。 请注意，如果该值是一个字符串，则将它作为要检索的直接量文本模式，而不是首先被转换为 RegExp 对象。 |
| newvalue | 必需。一个字符串值。规定了替换文本或生成替换文本的函数。 |
return value
| 类型 | 描述 |
|---|---|
| String | 一个新的字符串，是用 replacement 替换了 regexp 的第一次匹配或所有匹配之后得到的。 |
technical details
| JavaScript version: | 1.2 |
|---|
More examples
Examples
Perform a global replacement:
var str="Mr Blue has a blue house and a blue car";
var n=str.replace(/blue/g,"red");
var n=str.replace(/blue/g,"red");
n output:
Mr Blue has a red house and a red car
try it"
Examples
Perform a global substitution ignoring case:
var str="Mr Blue has a blue house and a blue car";
var n=str.replace(/blue/gi, "red");
var n=str.replace(/blue/gi, "red");
n output:
Mr red has a red house and a red car
try it"