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.
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Output the tooltip text to the page</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/element-collections-properties/include-script">7. Include the script in another page</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/element-collections-properties/for-of-loop">8. The for of Loop</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/element-collections-properties/handler-in-loop">9. Add the handler using the loop</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/element-collections-properties/oninput-event-handler">10. The oninput Event Handler</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-basics/element-collections-properties/length-property">11. 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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.</p><p>You can lock and unlock the button in JavaScript by assigning Boolean values to the <code>disabled</code> property for this button. If the <code>true</code> value is assigned, then the button is locked, whereas if it is assigned <code>false</code>, then the button is unlocked.</p><pre><code>let button = document.querySelector('button');
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<h1 class="inner-heading">It can be healthy to go for a walk.</h1>
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<button class="heart" type="button"><span class="likes-number">36</span></button>
<time datetime="2020-02-19">February 19, 2020</time>
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<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>
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<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>
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<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>
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<span class="text-counter"><span class="char-counter">217</span>/218 characters used</span>
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