str.replace中的白名单

Question

i'm using this code to replace everyone who has website link in they name change it to nothing eg

Username - Somewebsite.com -> Username -

For that I use this code:

name.replace(/([a-zA-Z0-9\-]*\.com)/g, '');

But I want to make it so when user is using my website adress in their name to not remove it eg

Username - Mywebsitename.com -> Username - Mywebsitename.com

Answer 1

Easiest would be to just use a callback for replace() and weed out matches on a certain string

var mySite = 'Somewebsite.com';

var name   = "Username - Somewebsite.com";

var result = name.replace(/([a-zA-Z0-9\-]*\.com)/g, function(what) {
    return what === mySite ? what : "";
});

FIDDLE

Answer 2

Nearly pure regex solution:

/\s+\-\s+(?!Mywebsite\.com)([a-zA-Z0-9\-]+)\.com/i

Working example:

 var regex = /\\s+\\-\\s+(?!Mywebsite\\.com)[a-zA-Z0-9\\-]+\\.com/i var string = 'Username - Somewebsite.com' var output = 'Username -' console.log('Match:', string) console.log('Result:', string.replace(regex, ' -')) console.log('Correct:', (string.replace(regex, ' -') === output) === true) console.log('') // new line var string = 'Username - Mywebsite.com' var output = 'Username - Mywebsite.com' console.log('Match:', string) console.log('Result:', string.replace(regex, ' -')) console.log('Correct:', (string.replace(regex, ' -') === output) === true) 

Regex Explanation:

/ //-> open regex
  \s+ //-> match one or more spaces
  \- //-> match one literal dash
  \s+ //-> match one or more spaces
  (?!Mywebsite\.com) //-> look ahead & assert next match is not "Mywebsite.com"
  ([a-zA-Z0-9\-]+) //-> match one or more lower or upper case letter, digits, & dot
  \. //-> match literal dot
  c //-> match c
  o //-> match o
  m //-> match m 
/ //-> close regex
i //-> make search case insensitive

Look behind would likely have been more ideal for this, but it's not supported in JavaScript.

I hope that helps!