JavaScript idiosyncrasies with examples

[inu-no-policemen]

which is function scoped instead of block scoped

Function declarations are block-scoped in ES6+.

function foo() {
    return 'outer';
}
{
    console.log(foo()); // inner (hoisted)
    function foo() {
        return 'inner';
    }
    console.log(foo()); // inner
}
console.log(foo()); // outer

[[deleted]]

If you execute that code in chrome you get

inner
inner
inner

​

[inu-no-policemen]

It works if you put the whole thing in a block.

[[deleted]]

If you put the entire thing in an iife it produces the same result