csscss-selectorscss-gradients

Scrollable gradient chat bubbles

I want a white container with chat bubbles masked to a gradient that when scrolled will change with the gradient below, as seen in this example:

Desired UI

I've tried making the part of .container that is behind any chatBubble transparent so that the background of .root is visible.

.root {
  background-color: linear-gradient(red, yellow);
  width: 100vw;
  height: 100vh;
}

.container {
  width: 100%;
  height: 100vh;
  background-color: white
}

.chatBubble {
  background-color: transparent;
  border-radius: 4px;
  min-width: 50;
  padding: 10px;
}
<div class="root">
  <div class="container">
    <chatBubble>This is a chat bubble</chatBubble>
    <chatBubble>This is another chat bubble</chatBubble>
  </div>
</div>

Solution

  • You can "drop shadows" from .bubble:

    * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.container {
  --gap: 20px;
  --width: 800px;
  --background: #fff;
  display: flex;
  flex-direction: column;
  max-width: var(--width);
  margin: 16px auto;
  padding: 0 16px;
  overflow: hidden;
  gap: var(--gap);
  box-shadow: 0 0 0 100vw var(--background);
  font-family: sans-serif;
}

.container:before {
  content: '';
  inset: 0;
  position: fixed;
  z-index: -1;
  background: linear-gradient(purple, blue);
}

.bubble {
  max-width: 80%;
  background-color: lightgray;
  border-radius: 16px;
  padding: 8px 16px;
  box-shadow: 0 0 0 var(--gap) var(--background);
  position: relative;
}

.bubble::before,
.bubble::after {
  content: '';
  position: absolute;
  inset: calc(var(--gap) / -2) auto;
  background-color: var(--background);
  width: var(--width);
}

.bubble::before {
  right: 100%;
}

.bubble::after {
  left: 100%;
}

.bubble.primary {
  background-color: transparent;
  color: #fff;
  align-self: flex-end;
}
    <div class="container">
  <div class="bubble">show weekend?</div>
  <div class="bubble primary">I'm down!</div>
  <div class="bubble">lets do this its been way to long since we were all together!</div>
  <div class="bubble primary ">Whos down for a pregame</div>
  <div class="bubble">YES! I got the day off! Say when and where?</div>
  <div class="bubble primary">Hows about Old Town at 4? we can get some grub and then head over to the venue</div>
  <div class="bubble">Yeah getting the band back together</div>
  <div class="bubble">show weekend?</div>
  <div class="bubble primary">I'm down!</div>
  <div class="bubble">lets do this its been way to long since we were all together!</div>
  <div class="bubble primary ">Whos down for a pregame</div>
  <div class="bubble">YES! I got the day off! Say when and where?</div>
  <div class="bubble primary">Hows about Old Town at 4? we can get some grub and then head over to the venue</div>
  <div class="bubble">Yeah getting the band back together</div>
  <div class="bubble">show weekend?</div>
  <div class="bubble primary">I'm down!</div>
  <div class="bubble">lets do this its been way to long since we were all together!</div>
  <div class="bubble primary ">Whos down for a pregame</div>
  <div class="bubble">YES! I got the day off! Say when and where?</div>
  <div class="bubble primary">Hows about Old Town at 4? we can get some grub and then head over to the venue</div>
  <div class="bubble">Yeah getting the band back together</div>
</div>