Virtual DOMJavaScript DOM 模型
Virtual DOM 是一个 JavaScript DOM 模型,支持元素创建,区别计算和分支操作,提供高效的渲染。
代码示例
var h = require('virtual-dom/h'); var diff = require('virtual-dom/diff'); var patch = require('virtual-dom/patch'); var createElement = require('virtual-dom/create-element'); // 1: Create a function that declares what the DOM should look like function render(count) { return h('div', { style: { textAlign: 'center', lineHeight: (100 + count) + 'px', border: '1px solid red', width: (100 + count) + 'px', height: (100 + count) + 'px' } }, [String(count)]); } // 2: Initialise the document var count = 0; // We need some app data. Here we just store a count. var tree = render(count); // We need an initial tree var rootNode = createElement(tree); // Create an initial root DOM node ... document.body.appendChild(rootNode); // ... and it should be in the document // 3: Wire up the update logic setInterval(function () { count++; var newTree = render(count); var patches = diff(tree, newTree); rootNode = patch(rootNode, patches); tree = newTree; }, 1000);
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