手写用 ES6proxy 如何实现 arr[-1] 的访问（滴滴2020）

[Sunny-117]

No description provided.

[CXGBro]

let arr= [1,2,3,4]
let proxy = new Proxy(arr,{
  get(target,key){
    if(key<0){
      return target[target.length+parseInt(key)]
    }
    return target[key] 
  }
})
console.log(proxy[-2]);
console.log(proxy[2]);

[cscty]

        let a = [1, 2, 3];
        let proxy = new Proxy(a, {
            get(target, key) {
                if (key === "-1") {
                    return target[target.length - 1];
                }
            },
        });
        console.log(proxy[-1]);

[mafeiGitHub]

let arr = [1, 2, 3, 4]
let proxy = new Proxy(arr, {
    get(target, key) {
        if (key < 0) {
            return target[target.length + parseInt(key)]
        }
        return target[key]
    }
})
// 测试
console.log(proxy[-1]);