javascript if else doesn't work as shorthand code example

Example 1: make shorter if statements with objects

var name_map = {
        "#first": "First Name",
        "#middle": "Middle Name",
        "#last": "Last Name"
}

if (Object.keys(check_map).every(selector => $(selector).val())) { 
	  // Yes, they all have non-blank values
} else {
	// No, at least one of them has a blank value (or didn't exist at all)
}

Example 2: if statemnt shorthand js without else

//else if statement shorthand
y = (x === 2) ? 1 : (x === 3) ? 2 : (x === 4) ? 7 : 1000;