html - Simple JavaScript timer -

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i trying create simple javascript count down timer, have problem when displaying "minute" string "0" when has 1 digit, adds "0" every second while "seconds" not add more "0", 1 "0" when displays 1 numerical digit, how display 1 "0" minute?

regards.

<!doctype html> <html> <head>     <meta charset="utf-8" />     <title>count down test</title> </head> <body>  <p id="demo"></p>  <script> var seconds = 10; //10 sec test, 60 var minutes = 5; //10 min test, 59 var hour = 1; //can set 48 hours 2days, 72 hours 3days  //function display time function count() {     if(hour == 0 && minutes == 0 && seconds == 0) {         clearinterval();     }      //reset seconds when reached 0     if(seconds == 0) {         seconds = 10; //originally 60         minutes--;     }      if(minutes == 0) {         minutes = 10; //originally 59          if(hour != 0) {             hour--;         }     }      //-1sec every second     seconds--;      //if less 10 sec add "string" character 0 first digit     if(seconds < 10) {         seconds = "0" + seconds;     }      //if less 10 min add "string" character 0 first digit     if(minutes < 10) {         minutes = "0" + minutes;     }      document.getelementbyid("demo").innerhtml = hour + " : " + minutes + " : " + seconds; }  count();  setinterval(function(){     count(); }, 1000); </script> </body> </html>

when minute digit less 10 adding string "0" orignal data type number minute , converting string type , getting repeated thats why adding 0 again , again string have parsefloat() orignal minute numeric type js not add 0 string again each second.. hope make sense can check code below test again.
//you doing //wrong case

//if less 10 sec add "string" character 0 first digit if(seconds < 10) {     seconds = "0" + seconds; }  //if less 10 min add "string" character 0 first digit if(minutes < 10) {      minutes = "0" + minutes; }  // // right case //if less 10 sec add "string" character 0 first digit if(seconds < 10) { seconds = "0" + seconds; }  //if less 10 min add "string" character 0 first digit if(minutes < 10) { minutes = "0" + parsefloat(minutes); }

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