SOURCE

//比较两个数组是否相等
const arr1 = [1,2,3,4]
const arr2 = [1,2,3,4]
console.log("1",arr1==arr2)
let isTrue
 if(arr1.length==arr2.length){
     isTrue =arr1.every((item ,index)=>
        arr2[index]==item
    )
 }
console.log("2",isTrue)

let isTrue1
 if(arr1.length==arr2.length){
     isTrue1 = arr1.filter((item ,index)=>
         item != arr2[index] 
     ).length==0
 }
 console.log("3",isTrue1)

 let isTrue2
 if(arr1.length==arr2.length){
     isTrue2 = arr1.findIndex((item ,index)=>
         item != arr2[index] 
     )==-1
 }
 console.log("4",isTrue2)
     

console.log("5",JSON.stringify(arr1)==JSON.stringify(arr2))