Method 1, use string interception substring() and character position query indexOf();

string.substring(start,end) intercepts a string from string.

start: interception starting position.

end: intercept the end position.

string.indexOf(findstr), find the position of the specified string in string

findstr: the string you are looking for var?str1="aaa@hotmail.com"; //To intercept the content between @ and .

var?str2=str1.substring(str1.indexOf("@")+1,str1.indexOf("."));

console.log(str2);

Method 2, use regular expressions

[\@] matches @

[\.] matches .

.Match any character

+match the previous content one or more times

*match the signature content 0 or more times

The content in () can be replaced with $1, which is the part we are looking for

$1, $2,... can match () in the regular expression. The first bracket numbered in sequence is $1, the second bracket The ones digit is $2, and so on var?str1="aaa@hotmail.com";//To intercept the content between @ and .

var?reg=new?RegExp('.*[\ @]+(.*)[\.]+.*');

var?str2=str1.replace(reg,"$1");

console.log( str2);