Skip to content

Update 12i.html #169

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 1 commit into
base: main
Choose a base branch
from
Open

Update 12i.html #169

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
106 changes: 44 additions & 62 deletions 1-exercise-solutions/lesson-12/12i.html
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,70 +1,52 @@
<!DOCTYPE html>
<html>
<head>
<title>App</title>
</head>
<body>
<!--
Note: This is just a sample solution. Other
solutions are possible so don't worry if
your solution looks different.
-->
<button onclick="
messages++;
displayNotification();
">Add</button>

<button onclick="
if (messages > 0) {
messages--;

// If there are no new messages, stop displaying
// the notification in the tab.
if (messages === 0) {
stopNotification();
}
}
">Remove</button>
<head>
<title>12I - App</title>
</head>

<body>
<button class="js-add-btn">Add</button>
<button class="js-remove-btn">Remove</button>
<script>
let messages = 2;

// Save the intervalId in case we need to cancel it.
let intervalId;

// We'll use this variable to keep track of whether
// or not we're displaying the notification.
let isDisplayingNotification;

// Start displaying the notification in the tab
// when the page first loads.
displayNotification();

function displayNotification() {
// If we're already displaying the notification,
// stop this function because we don't want to
// create 2 intervals at the same time.
if (isDisplayingNotification) {
return;
let intervalId;
let number = 0;
let flag = false;

document.querySelector('.js-add-btn')
.addEventListener('click', () => {
number++;
blinking();
});
document.querySelector('.js-remove-btn')
.addEventListener('click', () => {
blinking();
if (number > 0) { number--; blinking(); }
if (number === 0) {
clearInterval(intervalId);
document.title = '12I - App';
flag = false;
}
});

function blinking() {
if (!flag) {

clearInterval(intervalId);

intervalId = setInterval(function () {
if (document.title === '12I - App') {
document.title = `(${number}) New message`;
} else {
document.title = '12I - App';
}
}, 1000);

flag = true;
}
}

isDisplayingNotification = true;

intervalId = setInterval(function() {
if (document.title === 'App') {
document.title = `(${messages}) New messages`;
} else {
document.title = 'App';
}
}, 1000);
}

function stopNotification() {
isDisplayingNotification = false;

clearInterval(intervalId);
document.title = 'App';
}
</script>
</body>
</html>
</body>

</html>