Keep width when using letter-spacing on hover

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情歌与酒 2020-12-11 06:39

I have a some basic button styles where on :hover I add the letter-spacing property:

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自闭症患者 (楼主)

2020-12-11 07:24

On idea to approximate this is to duplicate the text considering a hidden one that has already the letter-spacing and another one on the top that you animate to fill the space already defined by the hidden text:

Here is an idea by making the text color the same as background:

.btn {
  display: inline-block;
  text-align: center;
  background-color: transparent;
  border: 1px solid transparent;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  border-radius: 0.25rem;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom:10px;
}

.btn-primary {
  background-color: #8065F1;
  color: #FFFFFF;
}

.btn-large {
  border-radius: 32px;
  box-shadow: 0 2px 80px 0 rgba(74, 74, 74, 0.23);
  padding: 0.25rem 3rem;
  font-size: 1.5rem;
  text-transform: uppercase;
}

.btn::before {
  content:attr(data-text);
  position:absolute;
  left:0;
  right:0;
  text-align:center;
  letter-spacing: initial;
  color:#fff;
  transition: all 0.2s ease;
}
.btn {
  letter-spacing: 4px;
  color:#8065F1;
  position:relative;
}
.btn:hover::before {
  letter-spacing: 4px;
}

Another one using opacity and both pseudo element in case the background is not a solid color:

.btn {
  display: inline-block;
  text-align: center;
  background-color: transparent;
  border: 1px solid transparent;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  border-radius: 0.25rem;
  cursor: pointer;
  transition: all 0.2s ease;
  margin-bottom:10px;
}

.btn-primary {
  background: linear-gradient(#8065F1,purple);
  color: #FFFFFF;
}

.btn-large {
  border-radius: 32px;
  box-shadow: 0 2px 80px 0 rgba(74, 74, 74, 0.23);
  padding: 0.25rem 3rem;
  font-size: 1.5rem;
  text-transform: uppercase;
}
.btn {
  position:relative;
  font-size:0;
}
.btn::before {
  content:attr(data-text);
  position:absolute;
  left:0;
  right:0;
  text-align:center;
  letter-spacing: initial;
  font-size: 1.5rem;
  transition: all 0.2s ease;
}
.btn::after {
  content:attr(data-text);
  letter-spacing: 4px;
  opacity:0;
  font-size: 1.5rem;
}
.btn:hover::before {
  letter-spacing: 4px;
}

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