简介 | TanStack Virtual 文档

TanStack Virtual 是一个无头 UI 实用程序，用于在 JS/TS、React、Vue、Svelte、Solid、Lit 和 Angular 中虚拟化元素的长列表。它不是一个组件，因此不附带或为您渲染任何标记或样式。虽然这需要您提供一些标记和样式，但您将保留 100% 控制权来控制您的样式、设计和实现。

Virtualizer

TanStack Virtual 的核心是 Virtualizer。Virtualizer 可以垂直（默认）或水平方向定位，这使得通过将两个轴配置组合在一起，可以实现垂直、水平甚至网格状的虚拟化。

这里只是一个快速示例，展示了在 React 中使用 TanStack Virtual 在 div 中虚拟化长列表的样子

tsx

import { useVirtualizer } from '@tanstack/react-virtual';

function App() {
  // The scrollable element for your list
  const parentRef = React.useRef(null)

  // The virtualizer
  const rowVirtualizer = useVirtualizer({
    count: 10000,
    getScrollElement: () => parentRef.current,
    estimateSize: () => 35,
  })

  return (
    <>
      {/* The scrollable element for your list */}
      <div
        ref={parentRef}
        style={{
          height: `400px`,
          overflow: 'auto', // Make it scroll!
        }}
      >
        {/* The large inner element to hold all of the items */}
        <div
          style={{
            height: `${rowVirtualizer.getTotalSize()}px`,
            width: '100%',
            position: 'relative',
          }}
        >
          {/* Only the visible items in the virtualizer, manually positioned to be in view */}
          {rowVirtualizer.getVirtualItems().map((virtualItem) => (
            <div
              key={virtualItem.key}
              style={{
                position: 'absolute',
                top: 0,
                left: 0,
                width: '100%',
                height: `${virtualItem.size}px`,
                transform: `translateY(${virtualItem.start}px)`,
              }}
            >
              Row {virtualItem.index}
            </div>
          ))}
        </div>
      </div>
    </>
  )
}

import { useVirtualizer } from '@tanstack/react-virtual';

function App() {
  // The scrollable element for your list
  const parentRef = React.useRef(null)

  // The virtualizer
  const rowVirtualizer = useVirtualizer({
    count: 10000,
    getScrollElement: () => parentRef.current,
    estimateSize: () => 35,
  })

  return (
    <>
      {/* The scrollable element for your list */}
      <div
        ref={parentRef}
        style={{
          height: `400px`,
          overflow: 'auto', // Make it scroll!
        }}
      >
        {/* The large inner element to hold all of the items */}
        <div
          style={{
            height: `${rowVirtualizer.getTotalSize()}px`,
            width: '100%',
            position: 'relative',
          }}
        >
          {/* Only the visible items in the virtualizer, manually positioned to be in view */}
          {rowVirtualizer.getVirtualItems().map((virtualItem) => (
            <div
              key={virtualItem.key}
              style={{
                position: 'absolute',
                top: 0,
                left: 0,
                width: '100%',
                height: `${virtualItem.size}px`,
                transform: `translateY(${virtualItem.start}px)`,
              }}
            >
              Row {virtualItem.index}
            </div>
          ))}
        </div>
      </div>
    </>
  )
}

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简介

Virtualizer

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