transition-property

transition-property: margin-right;

transition-property: margin-right, color;

transition-property: all;

transition-property: none;

<section id="default-example">
  <div id="example-element">Hover to see<br />the transition.</div>
</section>

#example-element {
  background-color: #e4f0f5;
  color: #000;
  padding: 1rem;
  border-radius: 0.5rem;
  font: 1em monospace;
  width: 100%;
  transition: margin-right 2s;
}
#default-example:hover > #example-element {
  background-color: #909;
  color: #fff;
  margin-right: 40%;
}

/* キーワード値 */
transition-property: none;
transition-property: all;
/* <custom-ident> 値 */
transition-property: test_05;
transition-property: -specific;
transition-property: sliding-vertically;
/* 複数の値 */
transition-property: test1, animation4;
transition-property: all, height, color;
transition-property:
  all,
  -moz-specific,
  sliding;
/* グローバル値 */
transition-property: inherit;
transition-property: initial;
transition-property: revert;
transition-property: revert-layer;
transition-property: unset;

<button class="target">フォーカスしてください</button>

html {
  height: 100vh;
}
button {
  font-size: 1.4rem;
  padding: 10px 20px;
  border: 1px solid #ccc;
  border-radius: 10px;
  outline: none;
}

.target {
  transition-property: background-color;
  transition-duration: 1s;
  background-color: #ccc;
}
.target:hover,
.target:focus {
  background-color: #eee;
}