Javascript remove character and return string

Question

substr and substring not changing the original value. I want to change the original value and want to return a string after removing the character.

var String_text =  'Hello world!';
alert(String_text.substr(4,1));

Expected Output

Hell world!

Answer 1

You can use replace

var String_text =  'Hello world!';
alert(String_text.replace('o',''));