In JavaScript, the semicolon (;
) is optional as a statement separator, but omitting semicolons can be confusing, and lead to
unexpected results because a semicolon is implicitly inserted at the end of each line.
function fun() { return // Noncompliant. ';' implicitly inserted at end of line 5 // Noncompliant. ';' implicitly inserted at end of line } print(fun()); // prints "undefined", not "5"
function fun() { return 5; } print(fun());