CSS scaleY() Function
scaleY() function is used to scale elements in a two-dimensional space along the y-axis.
scaleY() function scales an element based on the number/s that you provide as an argument.
Because it only scales along the y-axis, the element will be distorted if you use it alone (for example, without also using the
scaleX() function to scale the x-axis).
Here's an example of scaling an element using
Scaling an element will usually cause it to overlap other elements on the page. The element takes up the same space within the document flow that it would have if it hadn't been scaled. In other words, other content will flow just as it normally would flow — often resulting in overlapping content.
In the previous example, I use
transform-origin to adjust the origin of the transformation. Specifically, I use
transform-origin: top left; so that the resized image remains within the viewport after the scaling operation.
The default origin for the rotation is
50% 50% (i.e. the center). Therefore, if we remove this property, the image will transform based on this value.
So here's an example of what the scale operation might look like when using the default
Overlapping Content - Bring to Front
You can use the
z-index property to specify which elements should appear in front when there's overlapping content.
The official syntax of the
scaleY() function is as follows:
scaleY() function accepts number parameters that define the scaling vector for the scale operation.
A number is either an integer, or zero or more decimal digits followed by a dot (
.) followed by one or more decimal digits and optionally an exponent composed of
E and an integer.
scaleY()function is defined in CSS Transforms Module Level 1 (W3C Working Draft)
The following table provided by Caniuse.com shows the level of browser support for this feature.