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translateY()

The translateY() CSS function repositions an element vertically on the 2D plane. Its result is a <transform-function> data type.

Note: translateY(ty) is equivalent to translate(0, ty) or translate3d(0, ty, 0).

/* <length-percentage> values */
transform: translateY(200px);
transform: translateY(50%);

<length-percentage>: The value is a <length> or <percentage> representing the ordinate of the translating vector. A percentage value refers to the height of the reference box defined by the transform-box property.

Cartesian coordinates on ℝ^2	Homogeneous coordinates on ℝℙ^2	Cartesian coordinates on ℝ^3	Homogeneous coordinates on ℝℙ^3
A translation is not a linear transformation in ℝ^2 and can't be represented using a Cartesian-coordinate matrix.	$(\begin{matrix} 1 & 0 & 0 \\ 0 & 1 & t \\ 0 & 0 & 1 \end{matrix})$	$(\begin{matrix} 1 & 0 & 0 \\ 0 & 1 & t \\ 0 & 0 & 1 \end{matrix})$	$(\begin{matrix} 1 & 0 & 0 & 0 \\ 0 & 1 & 0 & t \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{matrix})$
	`[1 0 0 1 0 t]`

translateY(<length-percentage>)

<div>Static</div>
<div class="moved">Moved</div>
<div>Static</div>

div {
  width: 60px;
  height: 60px;
  background-color: skyblue;
}

.moved {
  transform: translateY(10px);
  background-color: pink;
}

Specification
CSS Transforms Module Level 1 # funcdef-transform-translatey

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`translateY`	1	12	3.5	9	10.5	3.1	2	18	4	11	3.2	1.0