javascript / expert
Snippet
VNode Augmentation via Render Functions
Manually manipulating VNodes allows for the creation of Higher-Order Components that inject behavior or styles into slot content without adding extra DOM wrapper elements. This technique uses cloneVNode to merge new properties into existing virtual nodes.
snippet.js
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import { h, cloneVNode, defineComponent } from 'vue';export const AugmentedWrapper = defineComponent({setup(_, { slots }) {return () => {const defaultSlot = slots.default?.() || [];return defaultSlot.map(vnode =>cloneVNode(vnode, {onVnodeMounted: () => console.log('Node mounted'),class: 'enhanced-vnode'}));};}});
vue
Breakdown
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slots.default?.()
Executes the default slot function to retrieve the array of child VNodes.
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cloneVNode(vnode, { ... })
Creates a shallow copy of the VNode while merging in new lifecycle hooks or attributes.