Brother-Yang

``` function getIndex(arr){ let index=null; let minNum = Math.min(...arr.filter(item => item > 0)); index = arr.findIndex(item => item === minNum); return index; } ```

``` hello world let input = document.getElementById('input'); let text = document.getElementById('text'); let obj = {}; let proxy = new Proxy(obj, { get(target, property){ return Reflect.get(...arguments); }, set(target, property, value){ target[property]...