1. instanceof

Use the instanceof operator to determine,instanceof

const arr= []
instanceof arr === Array // true
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2. Array.isArray

Use ES5 method array. isArray keyword judgment, function details

const arr = []
Array.isArray(arr) // true

const obj = {}
Array.isArray(obj) // false
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3. Object.prototype.isPrototypeOf

The isPrototypeOf() method is used to test whether an Object exists on the prototype chain of another Object.

const arr = []
Object.prototype.isPrototypeOf(arr, Array.prototype) // true
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4. Object.getPrototypeOf

The object.getProtoTypeof () method returns the Prototype of the specified Object (the value of the internal [[Prototype]] property).

const arr = []
Object.getPrototypeOf(arr) === Array.prototype // true
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5. Object.prototype.toString

Call toString() using the Object prototype call or apply method to see if toString() is [Object Array]

const arr = []
Object.prototype.toString.call(arr) === '[object Array]' // true

const obj = {}
Object.prototype.toString.call(obj) // "[object Object]"
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