使用 ​​filter()​​​ 过滤 “空” 值,如 ​​null​​​、​​undefined​​​ 或空字符串,可以使用 ​​.filter(Boolean)​​ 的缩写方法

也可以

const words = ['spray', 'limit', 'elite', 'exuberant', 'destruction', 'present'];
const result = words.filter(word => word.length > 6);
console.log(result);
// expected output: Array ["exuberant", "destruction", "present"]

​Array.prototype.filter() - JavaScript | MDN​