如何在RegEx（Javascript）中使用变量？

Question

I already looked at the Mozzila website and W3schools but couldn't find the answer

var someFunction = function (someString, someOtherString)
{
   if (someOtherString.match(someString))
   {
     someString = new RegExp(someString);
     someOtherString = someOtherString.replace(someString, "XXX");
     return someOtherString;
   }

   return null;
};

someFunction("dog", "dogeatdog");

Now I want the above RegExp to be applied globally but I don't know where/how to add the g character so that the above function call returns XXXeatXXX .

Any help would be appreciated!

Answer 1

标志进入RegExp构造函数的第二个参数，例如

new RegExp(someString, 'g')