Replace strings from left until the first occuring string in Javascript

Question

I am trying to figure out how to replace example:

sw1_code1_number1_jpg --> code1_number1_jpg
hon2_noncode_number2_jpg --> noncode_number2_jpg
ccc3_etccode_number3_jpg --> etccode_number3_jpg
ddd4_varcode_number4_jpg --> varcode_number4_jpg

So the results are all string after the first _ If it doesn't find any _ then do nothing.

I know how to find and replace strings, str.replace, indexof, lastindexof but dont know how remove up to the first found occurrence.

Thank You

Answer 1

Use the replace method with a regular expression:

"sw1_code1_number1_jpg".replace(/^.*?_/, "");