Question 216000 in Javascript Question posted in
A very good W3school tutorial can be found here.

Javascript – I want to add a real time to my node.js project and i want to use it in if-else situation

i am making a project about daily newspaper for hotels. For example I want to display all activities in daily-newspaper tab on website, but also in homepage I want to display the close activites, for example if it’s last 2 hours for karaoke, i want to display it in homepage with ejsif. All datas are fake for project.

const dailyData = [
    {id:1, name:"Yoga Lesson" ,time: "10:30 AM", place:"Show Lounge", date:"26.07"},
    {id:2, name:"Zumba" ,time: "16:30 PM", place:"Pool Area", date:"28.07"},
    {id:3, name:"Disco" ,time: "12:00 AM ", place:"Eclipse Bar", date:"30.07"},  
]


app.use("/daily", function(req,res) {
    res.render("daily", {
        dailyData: dailyData
    })
});

So data is ready to use it in ".ejs" file.

<ul>
    <% dailyData.forEach(data => { %>
        <% if (data.time < ("I need help here")) { %>
         
        <% } %>
    <% }) %>
    
</ul>

Here I don’t know with what I should compare the data.time. I want to display the data, if it’s closer than 2 hours.
Thank you.

Tags:

2

Answers


  1. 0

    Instead of having two different time properties, consider using Unix time. You can modify your dailyData objects to look something like this:

    {id:1, name:"Yoga Lesson", time: 1690392600000, place:"Show Lounge"}

    Beware that JS uses milliseconds instead of seconds, so you’ll have to multiply the time given you by some converters by 1000.
    When it comes to rendering this, you can modify the format using DateTimeFormat, like this example:

    date = data.time;
options = {
  hour: "numeric",
  minute: "numeric",
  timeZone: "Australia/Sydney",
};
console.log(new Intl.DateTimeFormat("en-AU", options).format(date));

    This makes comparing super easy.

    if (date >= Date.now() && date <= Date.now() + 7200000) {
  console.log("Within two hours from now!");
} else { console.log("Not within two hours from now."); }
    Login or Signup to reply.
  2. 0 
    <ul>
    <% dailyData.forEach(data => { %>
        <% 
        let currentTime = new Date();
        let activityTime = new Date(`${data.date.split(".").reverse().join("-")}T${data.time}`);
        let timeDiff = Math.abs(activityTime - currentTime); // difference in milliseconds
        let hoursDiff = timeDiff / (1000 * 60 * 60); // convert to hours
        if (hoursDiff <= 2) { 
        %>
            <!-- Display the data here -->
            <li><%= data.name %> at <%= data.time %> at <%= data.place %></li>
        <% } %>
    <% }) %>
</ul>

    This code creates a Date object for the current time currentTime and another Date object for the time of each activity activityTime. It calculates the difference between these two times in hours hoursDiff. If this difference is less than or equal to 2, it displays the data.
    Also make sure that data.time is in 24 hours format for this to work correctly.
    this approach assumes the dates are for the current year. If that’s not the case, you may need to adjust the year in the activityTime creation accordingly.

    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search