How to write a regular expression that will return a string?

Question

JavaScript

Hello, tell me please.
There are lines that can be APPROXIMATELY of the following form:
['ss_SS'] ['tt_AA'] ['gg_A'] ['ff'] ['gg_AZZ']
The character inside the quotes can be any, this is just as an example.
The only thing they have in common is the square brackets and quotes inside the brackets.
Question: please tell me how to write 2 regular expressions that will return:
1st regular expression: characters before the underscore, that is, if there is a string ['ss_SS'] , then it should return 'ss' or if the string ['ss'], then 'ss' should return
2nd regular expression: all characters that are in quotes, that is, ['gg_AZZ'] - will return 'gg_AZZ'
I've been racking my brain all day...
Thanks

Answer 1

// если надо только скобки и кавычки убрать - необязательно использовать regexp
// \w эквивалентно [A-Za-z0-9_] 
"['gg_AZZ']".match(/\[\'(\w+)\'\]/)[1]; // gg_AZZ
"['gg_AZZ']".match(/[a-z]+/) // gg