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How do you add a specific-to-device variable in HTML/CSS?

I am writing a website that keeps track of the election and I am adding an auto-refresh feature that refreshes every minute. Every time a variable (called seconds ) and my code is as follows:

var secInterval = 0

var secInterval = setInterval(function() {

  var secInterval = secInterval + 1

  if (secInterval == 60){
    location.reload();
    var secInterval = 0
  }

}, 1000);

I would like to let the user set the rate at which the page refreshes. Also, I need to know how to automatically trigger this script when the webpage is pulled up.

You can use a dropdown or any suitable input field to get the refresh interval input from the user. Then store that input in Local Storage. Then, when a user refreshes the page or visits the page again, it will use the saved refresh interval.

 if (localStorage.getItem("refreshTime")){ var refreshTime = localStorage.getItem("refreshTime"); }else{ var refreshTime = 60; } var secInterval = 0; setInterval(function() { console.log(secInterval); secInterval = secInterval + 1 if (secInterval == refreshTime){ location.reload(); secInterval = 0 } }, 1000); function setRefreshTime(){ var refreshTimeInput = document.getElementById("refreshTime"); refreshTime = refreshTimeInput.value; localStorage.setItem("refreshTime", refreshTime); console.log(refreshTime); secInterval = 0; }
 <select name="refreshTime" id="refreshTime"> <option value="5">5</option> <option value="15">15</option> <option value="30">30</option> <option value="45">45</option> <option value="60">60</option> </select> <input type="button" value="Set Refresh Time" onclick="setRefreshTime()"/>

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