LocalStorageを使用してデータを保存する

Question

LocalStorageを使用してデータを保存しようとしています。このデータを使用して、ユーザーが更新した後でカウンタを再初期化したいとします。私のコードの例は、次のJSFiddleにあります。あなたはこのためにクッキーを使用することができます

var hj= document.getElementById("jam"); 
var mm= document.getElementById("menit"); 
var ds= document.getElementById("detik"); 


var startDateTime = new Date(); 
var startStamp = startDateTime.getTime(); 
console.log(startDateTime); 
console.log(startStamp); 
var newDate = new Date(); 
var newStamp = newDate.getTime(); 
// console.log(newStamp); 
var timer; 

function pad(val) { 
    return val > 9 ? val : "0" + val; 
} 

function updateClock() { 
    newDate = new Date(); 
    newStamp = newDate.getTime(); 
    var diff = Math.round((newStamp-startStamp)/1000); 

    var d = Math.floor(diff/(24*60*60)); 
    diff = diff-(d*24*60*60); 
    var h = Math.floor(diff/(60*60)); 
    diff = diff-(h*60*60); 
    var m = Math.floor(diff/(60)); 
    diff = diff-(m*60); 
    var s = diff; 




    // document.getElementById("time-elapsed").innerHTML = d+" day(s), "+h+" hour(s), "+m+" minute(s), "+s+" second(s) working"; 
    document.getElementById("jam").innerHTML=pad(h); 
    document.getElementById("menit").innerHTML=pad(m); 
    document.getElementById("detik").innerHTML=pad(s); 

} 

var time=setInterval(updateClock, 1000); 

https://jsfiddle.net/o5s4y2L7/

Answer 1

。

var hj= document.getElementById("jam"); 
var mm= document.getElementById("menit"); 
var ds= document.getElementById("detik"); 


var startDateTime = new Date(); 
var cookie_time = getCookie("timer_start"); 
var startStamp = cookie_time?cookie_time:startDateTime.getTime(); 
setCookie("timer_start", startStamp, 1); 
var newDate = new Date(); 
var newStamp = newDate.getTime(); 
var timer; 

function pad(val) { 
    return val > 9 ? val : "0" + val; 
} 

function updateClock() { 
    newDate = new Date(); 
    newStamp = newDate.getTime(); 
     var diff = Math.round((newStamp-startStamp)/1000); 

    var d = Math.floor(diff/(24*60*60)); 
    diff = diff-(d*24*60*60); 
    var h = Math.floor(diff/(60*60)); 
    diff = diff-(h*60*60); 
    var m = Math.floor(diff/(60)); 
    diff = diff-(m*60); 
    var s = diff; 




    document.getElementById("jam").innerHTML=pad(h); 
    document.getElementById("menit").innerHTML=pad(m); 
    document.getElementById("detik").innerHTML=pad(s); 

} 

function setCookie(cname, cvalue, exdays) { 
    var d = new Date(); 
    d.setTime(d.getTime() + (exdays*24*60*60*1000)); 
    var expires = "expires="+ d.toUTCString(); 
    document.cookie = cname + "=" + cvalue + "; " + expires; 
} 

function getCookie(cname) { 
    var name = cname + "="; 
    var ca = document.cookie.split(';'); 
    for(var i = 0; i <ca.length; i++) { 
     var c = ca[i]; 
     while (c.charAt(0)==' ') { 
      c = c.substring(1); 
     } 
     if (c.indexOf(name) == 0) { 
      return c.substring(name.length,c.length); 
     } 
    } 
    return ""; 
} 
var time=setInterval(updateClock, 1000);