Question

Should I use one over the other? Is using them all together better? Thanks.

Answer 1

• prop in obj checks whether obj has a property named prop at all, even if it’s just inherited from a prototype.

• obj.hasOwnProperty(prop) checks whether obj itself holds a property named prop; it ignores properties inherited from prototypes.

• obj[prop] gets the value of the prop property.

Use whichever one is appropriate for what you’re trying to accomplish

Note: In all three cases, prop must be a string.