如何去除一个数组中的空字符串、undefined、null 呢
let arr = ['c', '', 'g', null, undefined, 'f', ' '];
let newArr = arr.filter(item => item && item.trim());
console.log(newArr); // ["c", "g", "f"]
如何去除一个数组中的空字符串、undefined、null 呢
let arr = ['c', '', 'g', null, undefined, 'f', ' '];
let newArr = arr.filter(item => item && item.trim());
console.log(newArr); // ["c", "g", "f"]