JavaScript

Question

谁能告诉我为什么截止日期一到（即 'else' 部分）就不会重置？

var timeInMinutes = 1;
var currentTime = Date.parse(new Date());

var deadline = localStorage.deadline;
if(deadline) {
    deadline = new Date(deadline);
}else {
    deadline = new Date(Date.now() + timeInMinutes*60*1000);
    localStorage.deadline = deadline;
}

谢谢。

Answer 1

else 语句只会在第一次时运行，因为 deadline 之后总是 "truthy"。

由于 else 语句应该运行第一次和截止日期过后，请将您的 if 条件更改为：

var deadline = localStorage.deadline;
if(deadline && new Date() < new Date(deadline)) {
  deadline = new Date(deadline);
} else {
  deadline = new Date(Date.now() + timeInMinutes*60*1000);
  localStorage.deadline = deadline;
}

基本上就是说，"If there's a deadline and we haven't hit it, keep using the current deadline. Else, set a new deadline."

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