Escape dot in a regex range

Question

For some reason those two regex act the same way    43  gf  -- 65  replace     d -  g            43  -- 65  43  gf  -- 65  replace     d  -  g            43  -- 65   Demo  In the first regex I don t escape the dot    while in the second regex I do       What are the differences and why they act the same

User · Answer

On this web page  I see that    Remember that the dot is not a metacharacter inside a character class  so we do not need to escape it with a backslash    So I guess the escaping of it is unnecessary

User · Answer

Because the dot is inside character class  square brackets       Take a look at http   www regular-expressions info reference html  it says  under char class section       Any character except  -   add that character to the possible matches   for the character class

User · Answer

If you using JavaScript to test your Regex  try     instead of      It acts on the same way because JS remove first backslash

User · Answer

The dot operator   does not need to be escaped inside of a character class

[javascript] Escape dot in a regex range

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