I have a string and two words from a dictionary and I am trying to know if in my string there are words that are not my dictionary words.
var string = 'foobarfooba';
var patt = new RegExp("[^(foo|bar)]");// words from dictionary
var res = patt.test(string);
console.log(res);//return false
It should return true because in my string there is also 'ba', but it return false.
Same as Phil commented in your question, you have to get rid of the character class:
[^(foo|bar)]
^-- here --^
Character classes are used to match (or not match if you use ^) specific unsorted characters.
Just use:
var patt = new RegExp("(?:foo|bar)");// words from dictionary
If you want to ensure that all the string matches your regex, you can use:
^(?:foo|bar)+$
If you want to capture the invalid words, you can use a regex with capturing groups like this:
^(?:foo|bar)+|(.+)$
Match information
MATCH 1
1. [9-11] `ba`
var patt = /foo|bar/;