Loading…
Everything will be ready in few seconds
- Theory
- Theory
- Comments
The disabled Property, Locking the Button
We added a conditional statement to our script, and now, if a new comment is longer than 142 characters, an error message will appear. However, this will not prevent us from submitting the form and posting a comment that is too long. To fix this, you need to not only add a class to the form, but also to lock the submission button. If the button is locked, the form cannot be submitted.
You can lock and unlock the button in JavaScript by assigning Boolean values to the disabled property for this button. If the true value is assigned, then the button is locked, whereas if it is assigned false, then the button is unlocked.
let button = document.querySelector('button');
// Locks the button
button.disabled = true;
// Unlocks the button
button.disabled = false;The button with the submit-button class is responsible for submitting a new comment on our website. Find it and save it to the variable. After that add the conditional statement: if the comment is too long, the submit button must be locked. Check how the form works now.
Files
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="setting.css">
<link rel="stylesheet" href="style.css">
<title>FlashNews!</title>
</head>
<body class="page light-theme">
<header class="page-header">
<div class="container">
<span class="header-logo">
<img src="img/main-logo.svg" width="67" height="29" alt="FlashNews! portal logo">
</span>
<button class="theme-button" type="button">Change the theme</button>
</div>
</header>
<main class="inner-news">
<div class="tooltip">
<span class="tooltip-text"></span>
<button class="button close-button" type="button"><span>Close</span></button>
</div>
<article class="container">
<h1 class="inner-heading">It can be healthy to go for a walk.</h1>
<div class="news-full">
<img src="img/walk.jpg" alt="People go for walks.">
<div class="news-stats">
<button class="heart" type="button"><span class="likes-number">36</span></button>
<time datetime="2020-02-19">February 19, 2020</time>
</div>
<p>However, that might not be the case if you don't go for a stroll <button class="tooltip-button" type="button" data-tooltip-text="Or just don't go there">with those people</button>. Scientists from <button class="tooltip-button" type="button" data-tooltip-text="That's a very cool university">Harvard</button> have found that relationships with loved ones affect happiness more than intelligence, salary, or your number of <button class="tooltip-button" type="button" data-tooltip-text="Did YOU sign up for the newsletter?">followers</button>. It still remains <button class="tooltip-button" type="button" data-tooltip-text="More money is needed">unclear</button> how the number of <button class="tooltip-button" type="button" data-tooltip-text="The superior lifeform">kitties</button> affects your level of happiness.</p>
</div>
</article>
<section class="comment-feed container">
<h2>Comments</h2>
<ol class="comment-list">
<li class="user-comment">From the point of view of banal erudition, every individual whose cynical thinking creates associations with concepts of paradoxical illusions simply cannot but ignore the criteria of utopian subjectivity. And from the point of view of the value or content of this logical statement, it is determined by means of a purely negative predicate whether it adds anything to the entire body of knowledge. <br>
Immanuel Kant <br>
Do you think that you understand human nature better than Kant?</li>
</ol>
<form action="https://echo.htmlacademy.ru/courses" method="post" class="comment-form">
<div class="comment-inner">
<label class="comment-label" for="comment-textarea">your comment</label>
<textarea class="comment-field comment-area" rows="3" placeholder="Comment" required id="comment-textarea">To understand Kant's philosophy, you must first understand yourself. It might take you some time to achieve this. It often happens that you want to give a person happiness, but instead you bring them a volume of Kant.</textarea>
</div>
<span class="text-counter"><span class="char-counter">217</span>/218 characters used</span>
<button class="button submit-button" type="submit">Submit</button>
</form>
</section>
</main>
<footer class="page-footer">
<div class="container">
<p>© FlashNews!</p>
<span class="footer-logo">
<img src="img/white-logo.svg" alt="FlashNews! portal logo">
</span>
</div>
</footer>
<script src="themes.js"></script>
<script src="likes.js"></script>
<script src="comments.js"></script>
<script src="tooltip.js"></script>
</body>
</html>
/* Button text styles */
.tooltip-button {
cursor: pointer;
position: relative;
padding: 1px 8px;
border: none;
color: inherit;
font: inherit;
}
.tooltip-button::after {
position: absolute;
content: "";
top: 0;
right: 0;
width: 0;
height: 0;
border: 4px solid;
border-left-color: transparent;
border-bottom-color: transparent;
}
/* Tooltip styles */
@keyframes tooltip-opener {
0% {
transform: translate(50%) scaleX(0);
}
100% {
transform: translate(100%) scaleX(100%);
}
}
.tooltip {
z-index: 2;
display: none;
flex-direction: row-reverse;
position: fixed;
max-width: 256px;
right: 0;
top: 160px;
border-radius: 8px 0 0 8px;
}
.opened {
display: flex;
animation: tooltip-opener 150ms;
}
.tooltip-text {
display: flex;
align-items: center;
padding: 10px;
}
.close-button {
min-height: 64px;
display: flex;
justify-content: center;
align-items: center;
width: 30px;
margin: 0;
padding: 0;
border-radius: 8px 0 0 8px;
}
.close-button span {
display: inline-block;
vertical-align: middle;
transform: rotate(-90deg);
}
/* Comment entry block styles */
.comment-area {
height: unset;
resize: none;
margin-bottom: 10px;
padding-top: 4px;
padding-bottom: 4px;
line-height: 24px;
}
.text-counter {
display: inline-block;
vertical-align: baseline;
padding: 7px 0;
margin-right: auto;
}
.comment-form.warning .comment-label {
color: #f05b29;
}
.comment-form.warning .comment-area {
color: #f05b29;
border-color: #f05b29;
}
.comment-form.warning .comment-area:focus {
outline-color: #f05b29;
}
.comment-form.warning .char-counter {
color: #f05b29;
font-weight: bold;
}
.submit-button:disabled {
opacity: 0.25;
}
/* Color schemes */
.light-theme .tooltip {
background-color: #ffffff;
box-shadow: 0 0 16px rgba(0, 0, 0, 0.5);
}
.light-theme .tooltip-button {
background-color: #f2f2f2;
}
.light-theme .tooltip-button:focus,
.light-theme .tooltip-button:hover {
background-color: #6653d9;
color: #ffffff;
outline-color: #b6aaff;
}
.tooltip-button:active {
opacity: 0.6;
}
.light-theme .tooltip-button::after {
border-right-color: #6653d9;
border-top-color: #6653d9;
}
.dark-theme .tooltip {
background-color: #2a2930;
box-shadow: 0 0 16px rgba(0, 0, 0, 1);
}
.dark-theme .tooltip-button {
background-color: #0a0910;
}
.dark-theme .tooltip-button:focus,
.dark-theme .tooltip-button:hover {
outline-color: #6653d9;
background-color: #b6aaff;
color: #17161a;
}
.dark-theme .tooltip-button::after {
border-right-color: #b6aaff;
border-top-color: #b6aaff;
}
let tooltip = document.querySelector('.tooltip');
let closeButton = document.querySelector('.close-button');
let tooltipButtons = document.querySelectorAll('.tooltip-button');
let tooltipText = document.querySelector('.tooltip-text');
closeButton.onclick = function () {
tooltip.classList.remove('opened');
};
for (let tooltipButton of tooltipButtons) {
tooltipButton.onclick = function () {
tooltipText.textContent = tooltipButton.dataset.tooltipText;
tooltip.classList.add('opened');
};
}
let commentForm = document.querySelector('.comment-form');
let commentList = document.querySelector('.comment-list');
let commentField = document.querySelector('.comment-field');
let charCounter = document.querySelector('.char-counter');
// Declare a variable here
commentForm.onsubmit = function (evt) {
evt.preventDefault();
let newComment = document.createElement('li');
newComment.classList.add('user-comment');
newComment.textContent = commentField.value;
commentField.value = '';
commentList.append(newComment);
};
commentField.oninput = function () {
charCounter.textContent = commentField.value.length;
if (commentField.value.length > 218) {
commentForm.classList.add('warning');
// Lock the submit button here
}
};
let page = document.querySelector('.page');
let themeButton = document.querySelector('.theme-button');
themeButton.onclick = function () {
page.classList.toggle('light-theme');
page.classList.toggle('dark-theme');
};
let heart = document.querySelector('.heart');
let likesNumber = document.querySelector('.likes-number');
heart.onclick = function () {
if (heart.classList.contains('added')) {
likesNumber.textContent--;
} else {
likesNumber.textContent++;
}
heart.classList.toggle('added');
};
Thanks! We’ll fix everything at once!
The code has changed, click “Refresh” or turn autorun on.
You’ve gone to a different page
Click inside the mini-browser to shift the focus onto this window.
100%
Console
- On line 5, declare a variable
submitButtonand write an element to it with the classsubmit-button. - Add an instruction inside the conditional statement that locks the submit button:
submitButton.disabled = true;. - In the mini-browser type any two additional characters in the comment field. Notice how the submit button has become inactive.
- Remove one character from the input field. Please note that the counter remains red and the button is not unlocked, through we have a permissible number of characters.
Comments