Created
February 25, 2021 15:08
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| const noop = () => {} | |
| const elementHandler = { | |
| get: (element, key) => { | |
| if(key === 'setAttribute') | |
| return noop | |
| if(key === 'style') | |
| return { | |
| setProperty : noop, | |
| } | |
| if(typeof element[key] === 'function') | |
| return element[key].bind(element) | |
| return Reflect.get(element, key) | |
| }, | |
| } | |
| const documentMethods = [ | |
| 'createElement', | |
| 'createElementNS', | |
| 'createDocumentFragment', | |
| 'createTextNode', | |
| ] | |
| .map(key => [key, document[key]]) | |
| const nodeMethods = [ | |
| 'appendChild', | |
| 'insertBefore', | |
| ] | |
| .map(key => [key, Node.prototype[key]]) | |
| export function mount(host, Component){ | |
| host.vnodes = [] | |
| return m.mount(host, { | |
| view: () => m(Hydrator, {host}, m(Component)) | |
| }) | |
| } | |
| export function render(host, children, callback){ | |
| if(!host.vnodes) | |
| host.vnodes = [] | |
| return m.render( | |
| host, | |
| m(Hydrator, {host}, children), | |
| callback, | |
| ) | |
| } | |
| function Hydrator(){ | |
| return { | |
| view : v => | |
| v.children, | |
| oninit : v => { | |
| hijack(v.attrs.host) | |
| }, | |
| oncreate: () => { | |
| reinstate() | |
| }, | |
| } | |
| } | |
| function hijack(host){ | |
| nodeMethods.forEach(([key, method]) => { | |
| Node.prototype[key] = noop | |
| }) | |
| const walker = document.createTreeWalker(host) | |
| document.createDocumentFragment = () => | |
| walker.currentNode | |
| document.createTextNode = input => { | |
| let node = walker.nextNode() | |
| if(node.nodeType !== node.TEXT_NODE) | |
| node = walker.nextNode() | |
| if(!input.length) | |
| node.before(input) | |
| else if(node.nodeValue.length > input.length) | |
| node.splitText(input.length) | |
| return node | |
| } | |
| document.createElement = document.createElementNS = () => | |
| new Proxy(walker.nextNode(), elementHandler) | |
| elementHandler.set = (element, key, value) => { | |
| if(key === 'textContent'){ | |
| debugger | |
| walker.nextNode() | |
| } | |
| return value | |
| } | |
| } | |
| function reinstate(){ | |
| Object.assign(document, | |
| Object.fromEntries(documentMethods) | |
| ) | |
| Object.assign(Node.prototype, | |
| Object.fromEntries(nodeMethods) | |
| ) | |
| delete elementHandler.set | |
| elementHandler.get = (element, key) => | |
| typeof element[key] === 'function' | |
| ? | |
| element[key].bind(element) | |
| : | |
| Reflect.get(element, key) | |
| } |
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