Regex that matches anything not ending in .json

Question

For a web app I\'m trying to come up with a javascript regex that matches anything not ending in .json. Sounds simple but I\'m finding it pretty damn hard.

Answer 1

Try /^(?!.*\.json$).*$/

/^(?!.*\.json$).*$/.test("foo.json")
false
/^(?!.*\.json$).*$/.test("foo")
true
/^(?!.*\.json$).*$/.test("foo.html")
true

Answer 2

maybe instead of testing "match (not .json)" you could test "not match (.json)", which is easy ?

Answer 3

You can always just get the file extension and then compare it.

Regex to find file extension

/\.[^.]*$/

get the file extension with

var extension = /\.[^.]*$/.exec("something.json");

if(extension[0] === ".json"){
    //do something
}

Answer 4

I would create a regex to match .json and then when you check for it reverse the logic with a

match == false

That would be much simpler and it shows what you are trying to do making it a lot more obvious to other programmers.