Do you really know prototype and __proto__

Of the personal blog website welcome communication: firefly: https://blog.xkongkeji.com

Javascript only functions have prototype properties by default. Instances constructed by constructors have no extensions by default, unless the instance is manually extended (this is not Prototype, of course, just a property named prototype).
In JS, everything is an object. A method is an object, and its prototype is an object.
Prototype is a property of an object with a [[Construct]] inner method.

Such as functions, methods on objects, classes in ES6. Note that the arrow function in ES6 has no [[Construct]] method and therefore no prototype property unless you add one to it.

__proto__ is the bridge between the two instances and the prototype, what we call the prototype chain, and __proto__ points to the constructor’s prototype. The function of proto__ is to create a chain of prototypes, through __proto, you can constantly find the so-called parent prototype.
Each object has a __proto__ attribute

JavaScript can create an association between two objects using prototype and __proto__ so that one object can delegate to the other object’s properties and functions.
Such an association is a stereotype chain, a finite chain of objects that implements inheritance and shared properties.

mo4tech.com (Moment For Technology) is a global community with thousands techies from across the global hang out!Passionate technologists, be it gadget freaks, tech enthusiasts, coders, technopreneurs, or CIOs, you would find them all here.