myString.replace( VARIABLE, "") ...... but globally

Question

How can I use a variable to remove all instances of a substring from a string? (to remove, I'm thinking the best way is to replace, with nothing, globally... right?)

if I have these 2 strings,

myString = "This sentence is an example sentence." oldWord = " sentence" 

then something like this

myString.replace(oldWord, ""); 

only replaces the first instance of the variable in the string.

but if I add the global g like this myString.replace(/oldWord/g, ""); it doesn't work, because it thinks oldWord, in this case, is the substring, not a variable. How can I do this with the variable?

Answer 1

Well, you can use this:

var reg = new RegExp(oldWord, "g"); myString.replace(reg, ""); 

or simply:

myString.replace(new RegExp(oldWord, "g"), "");