定义一个数组
tags:any[];
方法1:filter
删除并不留空位this.tags = this.tags.filter(tag => tag !== removedTag);
方法2:splice
删除并不留空位const index = this.tags.indexOf(removedTag, 0);if (index > -1) { this.tags.splice(index, 1);}
方法3:remove
删除并留空位,会有empty占位const index = this.tags.indexOf(removedTag, 0);if (index > -1) { delete this.tags[index];}