当用户滚动两个选择器视图（动态）时，如何将Total1和Total2值设置为标签？

Question

Segment

当用户滚动1 nil时，总计变为app并且price崩溃如何存储总计1和总计2变量以向用户显示function openNav() { document.getElementById("mySidenav").style.width = "250px"; } function closeNav() { document.getElementById("mySidenav").style.width = "0"; }的总和

Answer 1

您可以使用合并运算符来阻止强制解包：

"scripts": {
  "prepublish": "npm test",
  "test": "gulp test",
  ...
}

https://en.wikipedia.org/wiki/Null_coalescing_operator