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Direct ProxiesでObject.observeの Polyfillはできるのか

Direct ProxiesでObject.observeの Polyfillはできるのか

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Kazuhito Hokamura

December 18, 2014
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  1. Direct Proxies var proxy = new Proxy(obj, {
 set(target, name,

    val, receiver) { // do something
 } }); • objΛҾ਺ͱͯ͠৽ͨͳ୅ཧΦϒδΣΫτʢproxyʣΛಘΔ • proxyΛૢ࡞ͨ࣌͠ʹhandler͕ݺ͹ΕΔ • objΛૢ࡞ͯ͠΋handler͸ݺ͹Εͳ͍
  2. ͳΜ͔ΤϥΔɾɾ // Firefox 36.0 Observer(Object); // enable polyfill var obj

    = {}; Object.observe(obj, handler); //=> uncaught exception: can only get notifier of observable objects, given [object Object]