Addressing specific issues: How to reposition elements without changing layouts?
In the traditional CSS layout, if you want to fine-tune an element's location, it's usually used.
margin
or
top/left
。 However, changes in these properties often trigger a re-flow of browsers, leading to a decrease in performance and even to an impact on the sequencing of surrounding elements.
CSS Transform
It offers a more advanced and performance-friendly solution.
1. Transform ' s unique advantages
- Independent rendering layer: Transform is a composite layer of browser - I'm not going anywhere. This means that it does not affect geometry of the surrounding elements, nor does it trigger re-alignment, which is extremely smooth.
-
Subpixel rendering:
and
top/leftTransform supports subpixel-level rendering, which effectively avoids “scinching” or “scanned” in animations. -
Coordinate system transformation:
It allows you to surround the centre of elements (or customize them)
transform-origin(c) Rotation and scaling, which is not possible with traditional layout attributes.
2. Common application scenarios and techniques
-
Perfect absolute center:
Combined
left: 50%; top: 50%;andtransform: translate(-50%, -50%);It is the standard practice to achieve the perfect placement of unknown width and height elements. -
Suspend magnification:
In product list or gallery, use
transform: scale(1.05);Intuitive interactive feedback to users without opening the parent container. - Hypothetical 3D effect: By a combination of tilt (Skew) and zoom, you can simulate a vision or folding effect on a 2D page.
3. Addressing the ambiguity resulting from the sequence of conversions
Many developers have found
transform: rotate(45deg) translate(100px);
and
transform: translate(100px) rotate(45deg);
The results are completely different. It's because of Transform. It's applied from right to left in turn. Our generator will automatically help you to manage the consolidation logic of these properties and ensure that what you see is what you get.
4. Recommendations for performance optimization
Although Transform Performance is good, but overuse (especially at the mobile end) may increase significant stock occupancy. The recommendations are only for elements that require dynamic interaction. At the same time, if it involves 3D transformation, add
backface-visibility: hidden;
The project is designed to enhance the performance of the project.