Regular expression character isssues

[exeba]

Filtering words with a "." or any of these escaped characters:

s = s.replace(/[-[\]{}()*+?.,\\^$|#]/g, '\\$&') // Escape regular expression characters

leads to empty result.
I seems to me that the search string is treated like a regex but them used like a regular string:

if (text.toLowerCase().indexOf(words[i]) !== -1)

Am I missing something?

[exeba]

Duplicate of #699