Extra semicolons (;) are usually introduced by mistake, for example because:

• It was meant to be replaced by an actual statement, but this was forgotten.
• There was a typo which lead the semicolon to be doubled, i.e. ;;.
• There was a misunderstanding about where semicolons are required or useful.

Noncompliant Code Example

var x = 1;; // Noncompliant

function foo() {
};  // Noncompliant

Compliant Solution

var x = 1;

function foo() {
}