Libraries like Framer Motion take advantage of this fact to build highly-performant animations without stretching or squashing. In other words, it lets you define a base position. This is an advanced technique, far beyond the scope of this blog post, but know that it's possible to use scale to increase an element's size without distorting its children. The CSS transform-origin property allows you to define the origin for the transformation of an element. For example, check out this old-timey TV power animation:įor this animation, the squashing effect actually improves the effect!Īnd, if we really don't want our text to squash, we can apply an inverse transform to the child. It may seem like a bummer that scale will stretch/squash the element's contents, but we can actually use this effect to our advantage. This means that the calculations run quicker, leading to smoother motion. With transforms, we can skip a bunch of steps. It's fine to do this once when the page loads, but when we animate something, we need to do all of those calculations many many times a second. Then, the paint algorithms run, figuring out which color every pixel needs to be, and filling it in. If the element has text inside, the line-wrapping algorithm needs to figure out if this new width affects the line breaks. All of the layout algorithms need to re-run, figuring out exactly where this element and all of its siblings should be. La propriété transform-origin permet de modifier lorigine du repère pour les opérations de transformation dun élément. Think about how much work is required when we change something like width. Incidentally, this is what makes transform such a good choice for animations! All of these transforms essentially treat our element like a flat image, warping and contorting it as you might in Photoshop. This reveals an important truth about transforms: elements are flattened into a texture. Now, let’s go in and add the transform property to the bar and set the X-scale to 0. We’ve styled the frame with border and a bit of padding, and the bar with background color, which renders like so: The syntax of transform-origin property in CSS. Let’s create a loading bar with an empty frame that fills as data loads: It won’t actually be monitoring the loading progress, but rather serve as a transition between two blocks of content. CSS transform-origin - The CSS transform-origin property is used to set origin of the transformed element. To change where a transformation originates from, you, of course, need a transform to work with. In this chapter, we’ll be doing just that as you learn the ins and outs of the transform-origin property. Or move it to the corner and allow it to swing: transform-origin allows us to set the center of a transform's movement, which can really alter the resulting transformation. That means you can move the origin to the top and scale an object downwards: This allows you to move that anchor point wherever you’d like, and have your transformations originate from there. Thankfully, CSS also gives you the transform-origin property. The sticking point with transform is that, by default, all of its operations originate from the center of the element, so whenever you scale something, you’re scaling it outward:Īnd whenever you rotate something, you’re spinning it:Īnd sometimes that’s fine. With transform and its arsenal of functions, you have the Swiss Army Knife of CSS animation in your toolbox: so there’s nothing you can’t do.
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