mostly-dom
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A virtual-dom for TypeScript
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<a href="../index.html">all files</a> / <a href="index.html">src/</a> removeVNodes.ts
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import { ElementVNode, VNode } from './'
import { ModuleCallbacks } from './modules/ModuleCallbacks'
export function removeVNodes(
parentNode: Node,
vNodes: Array<VNode>,
startIndex: number,
endIndex: number,
moduleCallbacks: ModuleCallbacks
)
{
for (; startIndex <= endIndex; ++startIndex) {
const vNode = vNodes[startIndex]
if (!vNode) continue
if (isElementVNode(vNode)) {
const { props } = vNode
invokeDestroyHook(vNode, moduleCallbacks)
const removeElement = moduleCallbacks.createRemoveElementFn(vNode.element)
moduleCallbacks.remove(vNode, removeElement)
if (props.remove) props.remove(vNode, removeElement)
else removeElement()
} else {
parentNode.removeChild(vNode.element)
}
}
}
function isElementVNode(vNode: VNode): vNode is ElementVNode {
return vNode.tagName && vNode.element
}
function invokeDestroyHook(vNode: VNode, moduleCallbacks: ModuleCallbacks) {
const props = vNode.props
if (props.destroy) props.destroy(vNode)
if (isElementVNode(vNode)) moduleCallbacks.destroy(vNode)
const children = vNode.children
if (!children) return
for (let i = 0; i < children.length; ++i) invokeDestroyHook(children[i], moduleCallbacks)
}
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