24个CSS新特性，不容错过！，如何学好web前端开发

CSS是网页样式设计的语言，新特性的学习和掌握对于提升开发者技能至关重要。以下是2023年应知应会的一些CSS新特性：

1. CSS Clipper

.clipped {
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

2. CSS Exclusions

.excluded {
  flow-root: flow-root(grid);
}

3. CSS Layout

.container {
  display: layout(grid);
}

4. CSS Marquee

.marquee {
  motion-path: path("M0,0 L100%,0");
  motion-offset: 0%;
  motion-rotation: auto 0deg;
}

5. CSS Masking

.masked {
  -webkit-mask-image: url(mask.png);
}

6. CSS Nesting

.container :is(h1, h2, h3) {
  color: blue;
}

7. CSS Properties and Values API

CSS.registerProperty({
  name: "--custom-property",
  syntax: "<number>",
  inherits: false,
  initialValue: 0
});

8. CSS Shapes

.shape {
  shape-outside: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

9. CSS Subgrid

.subgrid-item {
  display: subgrid;
}

10. CSS Typed Object Model

getComputedStyle(element).accumulate(true);

11. Forced Colors

.forced {
  forced-color-adjust: none;
}

12. Grid Extent Sizing

.grid {
  grid-template-rows: [start] 1fr [end];
}

13. Image Rendering

img {
  image-rendering: pixelated;
}

14. Logical Properties

.box {
  border-inline-start-width: 2px;
}

15. MathML Accessibility

math {
  speech: "math speech";
}

16. New Properties and Values

.box {
  aspect-ratio: 16 / 9;
}

17. Paint API

const canvas = document.createElement("canvas");
const ctx = canvas.getContext("bitmaprenderer");
const img = new Image();
img.src = "image.png";
img.onload = () => {
  ctx.transferFromImageBitmap(img);
};

18. Pointer Events

.nopointer {
  pointer-events: none;
}

19. Regions

.region {
  flow-into: "region-name";
}

20. Resize Observer

new ResizeObserver(entries => {
  for (let entry of entries) {
    const cr = entry.contentRect;
    console.log(`Element's size: width = ${cr.width}, height = ${cr.height}`