我創建了在線考試系統。javascript - 倒數計時器啓動和停止
我的問題:我點擊申請按鈕比倒計時器開始和有時瀏覽器頁面關閉後,我點擊相同的考試名稱,然後倒數計時器繼續,不開始開始。下面的截圖
查看:
<h2><p style="float: right" id="countdown"></p></h2>
<a href="<?php echo base_url(); ?>student/Examinations/apply_examinations/<?php echo $value['examination_test_id']; ?>" class="btn btn-primary" id="apply" onclick="resetCountdownInLocalStorage();">Apply</a>
<script>
$(document).ready(function() {
$examination_test_id = $("#examination_test_id").val();
$time_limit = $("#time_limit").val();
var d = new Date($time_limit);
var hours = d.getHours();
var minute = d.getMinutes();
var minutes = hours * 60 + minute;
var seconds = 60 * minutes;
if (typeof (Storage) !== "undefined") {
if (sessionStorage.seconds) {
seconds = sessionStorage.seconds;
}
}
function secondPassed() {
var hours = Math.floor(seconds/3600);
var minutes = Math.floor((seconds - (hours * 3600))/60);
// var remainingSeconds = seconds - (hours * 3600) - (minutes * 60);
var remainingSeconds = seconds % 60;
if (remainingSeconds < 10) {
remainingSeconds = "0" + remainingSeconds;
}
if (minutes < 10) {
minutes = "0" + minutes;
}
if (typeof (Storage) !== "undefined") {
sessionStorage.setItem("seconds", seconds);
}
document.getElementById('countdown').innerHTML = hours + ":" + minutes + ":" + remainingSeconds;
if (seconds == 0) {
clearInterval(myVar);
document.getElementById('countdown').innerHTML = alert('Timeout');
window.location.href = base_url + "student/Examinations/check_answer/" + $examination_test_id;
if (typeof (Storage) !== "undefined") {
sessionStorage.removeItem("seconds");
}
} else {
seconds--;
}
}
var myVar = setInterval(secondPassed, 1000);
});
function resetCountdownInLocalStorage() {
sessionStorage.removeItem("seconds");
}
</script>
我目前的形式並不完全瞭解你的問題。但是當你關閉瀏覽器並重新打開它時,你的'狀態'就會丟失。您正在有效地運行整個程序。如果您想在重新打開該頁面後「繼續」,則需要將該信息存儲在某處 –
@DylanMeeus請編寫代碼 – kishan123
@DylanMeeus首先查看屏幕截圖,然後單擊應用按鈕,然後定時器啓動並在某個時間之後關閉瀏覽器頁面幾分鐘我點擊相同的考試名稱申請然後倒數計時器開始繼續,不開始求助 – kishan123