Why when i have || condition i do not need to include 1 and -1 numbers in sorting? [duplicate]

i have this array

var arr = [
    {
        name:'Andrej',
        price:5
    },
    {
        name:'Andrej',
        price: 12
    },
    {
        name:'Don',
        price: 12
    },
    {
        name:'Andrej',
        price: 2
    },
    {
        name:'Cilia',
        price: 40
    },
    {
        name:'Andrej',
        price: 10
    },
]

so if i want to sort this array by name i will do

var sorted = arr.sort((a,b) => {
    return a.name > b.name ? 1 : -1;
})

and now i have th e array sorted by name

if i try

var sorted = arr.sort((a,b) => {
    return a.name > b.name;
})

it will not work. It needs 1 and -1 as numbers so the sort function will know how to swap the values.

If i need to sort the array by name and price and i try

var sorted = arr.sort((a,b) => {
    return a.name > b.name  || a.price - b.price;
})

now my array is sorted by name and price
Why in this case the shortcut works a.name > b.name but in previous case
when i had just the name it does not work