The linear, ease, ease-in, and other names are “aliases” of the cubic Bezier curve functions:
cubic-bezier(0, 0, 1, 1) // This is the linear function
cubic-bezier(0.42, 0, 1, 1) // This is the ease function
When we look at the general notation of cubic-bezier(x1, y1, x2, y2), the
x and y values are the coordinates of the points on a curve plotted on a graph.
In this case, the value of x is only in the range of 0 to 1.
There is a great service that helps you understand the functional representation of Bezier curves without requiring you to study math textbooks.
And this link contains an entire collection of different easing functions that are based on Bezier curves.
We can use the cubic-bezier function to define any forms of transitions.
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The transition-duration property</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/transition-duration-2">2. Transition duration, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/transition-property">3. The transition-property: which properties can be changed smoothly?</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/transition-delay">4. The transition-delay property</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/transition-timing-function">5. The “form” of the transition, transition-timing-function</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/transition-timing-function-2">6. transition-timing-function, step 2</a></li><li class="main-nav__course-contents-item main-nav__course-contents-item--current"><a href="/courses/dynamic/smooth-transitions/transition-timing-function-3">7. transition-timing-function, step 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/transition-timing-function-4">8. transition-timing-function, step 4</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/paper-buttons">9. Paper buttons, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/paper-buttons-2">10. Paper buttons, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/paper-buttons-3">11. Paper buttons, step 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/checkboxes">12. Checkboxes, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/checkboxes-2">13. Checkboxes, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/checkboxes-3">14. Checkboxes, step 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/radio-button">15. Radio buttons, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/radio-button-2">16. Radio buttons, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/radio-button-3">17. Radio buttons, step 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/toggle-switches">18. Toggle switches, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/toggle-switches-2">19. Toggle switches, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/toggle-switches-3">20. Toggle switches, step 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/toggle-switches-4">21. Toggle switches, step 4</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/transformer-icon">22. The transformer icon, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/transformer-icon-2">23. The transformer icon, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/transformer-icon-3">24. The transformer icon, step 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/transformer-icon-4">25. The transformer icon, step 4</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/text-input-field">26. Text input field, step 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/text-input-field-2">27. Text input field, step 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/text-input-field-3">28. Text input field, step 3</a></li><li class="main-nav__course-contents-item"><a href="/courses/dynamic/smooth-transitions/text-input-field-4">29. Text input field, step 4</a></li></ul></div></div><a class="main-nav__course-item main-nav__course-button main-nav__course-button--next" href="/courses/dynamic/smooth-transitions/transition-timing-function-4">transition-timing-function, step 4</a></div><ul class="main-nav__list main-nav__list--user main-nav__list--user-guest"><li class="main-nav__item" itemprop="name"><a class="main-nav__link" href="/signup?redirect_url=%2Fcourses%2Fdynamic%2Fsmooth-transitions%2Ftransition-timing-function-3" title="Sign up" data-modal="open" data-value="register" itemprop="url"><span class="main-nav__icon" aria-hidden="true"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#user"></use></svg></span>Sign up</a></li><li class="main-nav__item main-nav__item--login" itemprop="name"><a class="main-nav__link" href="/login?redirect_url=%2Fcourses%2Fdynamic%2Fsmooth-transitions%2Ftransition-timing-function-3" title="Log in" data-modal="open" data-value="login" itemprop="url"><span 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course-tab--active js--theory-tab__theory"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered js--theory-tab__comments"><span class="course-tab__icon"><svg aria-hidden="true" style="width: 16px; height: 16px; fill: #2e2c9c;"><use xlink:href="/img/sprites/up.svg#comment"></use></svg></span><span class="course-tab__title">Comments</span></li></ul><section class="course-theory__content"><div class="js--theory-pane__theory course-theory__content-inner"><h1 class="course-theory__content-heading">transition-timing-function, step 3</h1><div class="course-theory__content-text"><p>The <code>linear</code>, <code>ease</code>, <code>ease-in</code>, and other names are “aliases” of the cubic <a target="_blank" rel="nofollow" href="https://en.wikipedia.org/wiki/Bézier_curve">Bezier curve</a> functions:</p><pre><code>cubic-bezier(0, 0, 1, 1) // This is the linear function
cubic-bezier(0.42, 0, 1, 1) // This is the ease function
</code></pre><p>When we look at the general notation of <code>cubic-bezier(x1, y1, x2, y2)</code>, the
<code>x</code> and <code>y</code> values are the coordinates of the points on a curve plotted on a graph.
In this case, the value of <code>x</code> is only in the range of <code>0</code> to <code>1</code>.</p><p>There is a <a target="_blank" rel="nofollow" href="http://cubic-bezier.com/">great service</a> that helps you understand the functional representation of Bezier curves without requiring you to study math textbooks.</p><p>And this <a target="_blank" rel="nofollow" href="http://easings.net/en">link</a> contains an entire collection of different easing functions that are based on Bezier curves. </p><p>We can use the <code>cubic-bezier</code> function to define any forms of transitions.</p></div></div><div class="js--theory-pane__comments hidden course-theory__content-inner"><div class="course-theory__content-text"><h2 class="course-theory__content-heading">Comments</h2><div id="disqus_thread"></div><script>
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