正则表达式，允许字母数字与空格并禁止某些特殊字符（<>＆;）

Question

I need helping in constructing a regular expression thats allows alphanumeric characters and disallows following special chararcters <>&; . Please help.

Answer 1

This regex matches alphanumeric and spaces:

 var regex = /[a-z0-9\\s]*/i; var string = "All Alphanumeric"; console.log(string.match(regex)); 

If you want to allow certain symbols, just add those to the regex (eg the below regex also allows the email @ symbol and the . :

 var regex = /[a-z0-9\\s@\\.]*/i; var string = "valid@email.domain"; console.log(string.match(regex)); 

Answer 2

The following regex matches everything except <>&; :

 const regex = /^[^<>&;]*$/ console.log(regex.test('Abc@123')) console.log(regex.test('Abc<123'))