语法错误在js中的if语句中意外出现

如何解决语法错误在js中的if语句中意外出现

当我尝试在浏览器中运行此脚本时，我在第14行收到带有意外标记

<script>
//Current time
var date = new Date();
var time = date.getTime();

//Time checker
if(time >= 7:55 && < 8:55){
    window.open('https://classroom.google.com/c/MTIyMjc3NTE0MzEw');
}
if(time >= 8:55 && < 9:55){
    window.open('https://classroom.google.com/c/MTE1MjA4MzM5MDgz');
}
if(time >= 9:55 && < 10:55){
    window.open('https://classroom.google.com/c/MTIyMjk4MzAxMjYx');
}
if(time >= 10:55 && < 11:55){
    window.open('https://classroom.google.com/c/MTIzMjMyNzU4ODk2');
}
if(time >= 11:55 && < 12:55){
    window.open('https://classroom.google.com/c/MTIzMTkzMjU1MjAx');
}
if(time >= 12:55 && < 13:55){
    window.open('https://classroom.google.com/c/MTIyMjk4MzAxMjQx');
}
if(time >= 13:55 && < 14:55){
    window.open('https://classroom.google.com/c/MTIyNDk3Mjk5NDQ2');
}
if(time >= 14:55 && <= 15:00){
    window.open('https://classroom.google.com/c/MTIyNjk1NTQxMzYw');
}
</script>

解决方法

getTime（）将为您提供毫秒数。 请尝试使用date.getHours（）。 记住传递参数以获得更具体的值

,

date.getTime()不返回一天中的时间。如果需要一天中的时间，请使用date.getHours()和date.getMinutes()。然后，您可以将其转换为午夜以来的分钟数，您可以用它来判断时间是否在您的特定范围内。

//Current time
var date = new Date();
var time = 60 * date.getHours() + date.getMinutes();

//Time checker
if(time >= (7 * 60 + 55) && time < (8 * 60 + 55)){
    window.open('https://classroom.google.com/c/MTIyMjc3NTE0MzEw');
}
if(time >= (8 * 60 + 55) && time < (9 * 60 + 55)){
    window.open('https://classroom.google.com/c/MTE1MjA4MzM5MDgz');
}
if(time >= (9 * 60 + 55) && time < (10 * 60 + 55)){
    window.open('https://classroom.google.com/c/MTIyMjk4MzAxMjYx');
}
if(time >= (10 * 60 + 55) && time < (11 * 60 + 55)){
    window.open('https://classroom.google.com/c/MTIzMjMyNzU4ODk2');
}
if(time >= (11 * 60 + 55) && time < (12 * 60 + 55)){
    window.open('https://classroom.google.com/c/MTIzMTkzMjU1MjAx');
}
if(time >= (12 * 60 + 55) && time < (13 * 60 + 55)){
    window.open('https://classroom.google.com/c/MTIyMjk4MzAxMjQx');
}
if(time >= (13 * 60 + 55) && time < (14 * 60 + 55)){
    window.open('https://classroom.google.com/c/MTIyNDk3Mjk5NDQ2');
}
if(time >= (14 * 60 + 55) && time < (15 * 60 + 55)){
    window.open('https://classroom.google.com/c/MTIyNjk1NTQxMzYw');
}