Do we need a semicolon after function declaration? [duplicate]

Answer 1

A function declaration does not need (and should not have) a semicolon following it:

function test(o) {
}

However, if you write a function as an expression, like the variable initializer below, then the statement should be terminated with a semicolon, just like any other statement would be:

var a = function test(o) {
};

See more about constructor vs declaration(statement) vs expression.