let: string str = "a=<random text> a=pattern:<random text (may be fixed length)> a=<random text>";
Suppose, from above string
pattern are fixed. There may or may not be
\n after each line.
How to remove
a=pattern:<random> from the
You could use regex capturing groups. Capture the text before and after the text you want to remove.
let newStr = str.replace(/(a=.+(\n)?)(a=pattern:.+)((\n)?a=.+)/, "$1$4")
Answered By – Ryan O'D
Answer Checked By – Clifford M. (BugsFixing Volunteer)