Question 43089 in Html Question posted in
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How to animate an element sliding out of the page? – Html

I have an element positioned at the bottom of the page, and I want to animate it sliding out of view.

In my implementation, the element is not actually vanishing, but rather just sliding down, such that if you scroll down, you will still be able to see it.

How can I implement this animation such that the element actually disappears and does not affect page size while sliding down?

visible = false;

const container = document.querySelector('.cta-container')

document.querySelector('button').addEventListener('click', () => {
  visible = !visible

  if (visible) {
    container.classList.remove('hidden')
    container.classList.add('visible')
  } else {
    container.classList.remove('visible')
    container.classList.add('hidden')
  }
})
.cta-container {
  position: absolute;
  bottom: 16px;
  left: 24px;
  padding: 16px;
  padding-right: 64px;
  background-color: white;
  transition: all 0.2s;
}

.header {
  font-size: 20px;
  margin-bottom: 8px;
}

.content {
  font-size: 16px;
}

.mat-elevation-z5 {
  box-shadow: 0px 3px 5px -1px rgba(0, 0, 0, 0.2), 0px 5px 8px 0px rgba(0, 0, 0, 0.14), 0px 1px 14px 0px rgba(0, 0, 0, 0.12)
}

.hidden {
  transform: translateY(190px);
}

.visible {
  transform: translateY(-16px);
}
<button>Toggle visibility</button>

<div class="cta-container mat-elevation-z5 hidden">
  <h1 class="header">Do something</h1>

  <p class="content">Yada yada</p>

  <button>Ok</button> <button>No</button>
</div>
Tags:

2

Answers


  1. 0

    Simply changing to position: fixed will make this work as you want. I’ve added a bunch of paragraphs of text to make the page scroll so you can see how this works on different sizes of pages, and that the dialog box will stay in that fixed position on the screen regardless of page size or scroll position.

    visible = false;

const container = document.querySelector('.cta-container')

document.querySelector('button').addEventListener('click', () => {
  visible = !visible

  if (visible) {
    container.classList.remove('hidden')
    container.classList.add('visible')
  } else {
    container.classList.remove('visible')
    container.classList.add('hidden')
  }
})
    .cta-container {
  position: fixed;
  bottom: 16px;
  left: 24px;
  padding: 16px;
  padding-right: 64px;
  background-color: white;
  transition: all 0.2s;
}

.header {
  font-size: 20px;
  margin-bottom: 8px;
}

.content {
  font-size: 16px;
}

.mat-elevation-z5 {
  box-shadow: 0px 3px 5px -1px rgba(0, 0, 0, 0.2), 0px 5px 8px 0px rgba(0, 0, 0, 0.14), 0px 1px 14px 0px rgba(0, 0, 0, 0.12)
}

.hidden {
  transform: translateY(190px);
}

.visible {
  transform: translateY(-16px);
}
    <button type="button">Toggle visibility</button>

<div class="cta-container mat-elevation-z5 hidden">
  <h1 class="header">Do something</h1>

  <p class="content">Yada yada</p>

  <button type="button">Ok</button> <button type="button">No</button>
</div>

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  2. 0

    position: fixed…
    But I also do some code simplifications…

    const container = document.querySelector('.cta-container')

document.querySelector('button').onclick =_=> 
  {
  container.classList.toggle('noShow')
  }
    .cta-container {
  position         : fixed;
  bottom           : 16px;
  left             : 24px;
  padding          : 16px;
  padding-right    : 64px;
  background-color : white;
  transition       : all 0.2s;
  }
.cta-container.noShow {
  transform  : translateY(190px);
  }
.cta-container:not(.noShow) {
  transform  : translateY(-16px);
  }
.mat-elevation-z5 {
  box-shadow : 0px 3px  5px -1px rgba(0, 0, 0, 0.2 )
             , 0px 5px  8px  0px rgba(0, 0, 0, 0.14)
             , 0px 1px 14px  0px rgba(0, 0, 0, 0.12);
  }
.header {
  font-size     : 20px;
  margin-bottom : 8px;
  }
.content {
  font-size : 16px;
  }
    <button>Toggle visibility</button>

<div class="cta-container mat-elevation-z5 noShow">
  <h1 class="header">Do something</h1>

  <p class="content">Yada yada</p>

  <button>Ok</button> <button>No</button>
</div>
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