CODEWITHSUNDEEP
javascriptgoogle-chromegoogle-chrome-extension
mattsven
mattsven

Reputation: 23293

Chrome Extension: Detecting new day (day changed) in Javascript?

I know there's not a event listener for a new day (or hour/minute, for that matter). But in my Chrome Extension, I need to know when a new day has started, and which means I'll have to use a setInterval function to find out when the day has changed. However, I'm not sure what to use for the interval value: 10 seconds, or 10 minutes? I'm worried about using up CPU & memory (constant setInterval calls), but I still want to know almost as soon as a new day starts. Any ideas as to what is the ideal way to handle this?

Upvotes: 3

Views: 2077

Answers (2)

kennebec
kennebec

Reputation: 104790

If you mean a new day for the user, you can set a single timeout when the page loads.

function setnewdaytimer(){
    if(window.newdaytimer) clearTimeout(newdaytimer);
    var now= new Date,
    tomorrow= new Date(now.getFullYear(), now.getMonth(), now.getDate()+1); 
    window.newdaytimer= setTimeout(newdayalarm, tomorrow-now);
}
function newdayalarm(){
    alert((new Date()).toLocaleTimeString());
}

window.onload=setnewdaytimer;

Upvotes: 5

Mohamed Mansour
Mohamed Mansour

Reputation: 40179

Depending how exact you want to be, the only way doing this is by setting an interval. You can set your precision to be whatever you want. 1min 5min 10min

Upvotes: 0

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