Why do we need the isPrototypeOf at all?
isPrototypeOf() usage when dealing with inheritance in JavaScript
How to make Javascript "isPrototypeOf" function return true? Why I cannot use an object's prototype in JavaScript "isPrototypeOf"? Why o.prototype.isPrototypeof is not a function, my javascript throws an exception Any caveats using isPrototypeOf in JavaScript to check if a variable is of a specific type? Why can I not do this? JavaScript Multi-level inheritance and isPrototypeOf contenScriptFile : Do we always need jQuery? Object.getPrototypeOf and example.isPrototypeOf(obj) gave confusing results Why do we need Promise in JS Why do we need to type '(" + i + ")' instead of just '(i)' isPrototypeOf in indesign isPrototypeOf in Javascript Why do we need ng-click? Why do we use next() function? Why Foo.prototype.isPrototypeOf(Foo) returns false? isPrototypeOf says no, but instanceof says yes – what's going on? .isPrototypeOf() and .hasOwnProperty() method confusion What's the difference between isPrototypeOf and instanceof in Javascript? Javascript object.create and isPrototypeOf isPrototypeOf and __proto__ have different results JavaScript isPrototypeOf vs instanceof usage Why do we need <form/> when we have AJAX? Why do we have Function.call in javascript? Why isPrototypeOf returning false, yet I can go up the prototype chain? Why do we need to use $scope here? Why do we need a Single Page Application? Why do we write window.? Object.prototype.isPrototypeOf vs. obj.prototype.isPrototypeOf Why this is valid code and what do we call it