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Add
Polymer.dom().notifyObservers method to 'kick' observers, for e…
…xample, when attributes change under Shadow DOM.
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Steven Orvell
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Aug 13, 2015
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| <!doctype html> | ||
| <html> | ||
| <head> | ||
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| <title>observeReNodes</title> | ||
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| <meta charset="utf-8"> | ||
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | ||
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| <script src="../../../webcomponentsjs/webcomponents-lite.js"></script> | ||
| <link rel="import" href="../../polymer.html"> | ||
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| </head> | ||
| <body> | ||
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| <dom-module id='test-inner'> | ||
| <template> | ||
| ~<content id="c" select=".a"></content>~ | ||
| </template> | ||
| <script> | ||
| Polymer({ | ||
| is:'test-inner', | ||
| ready: function() { | ||
| this.observe(); | ||
| }, | ||
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| observe: function() { | ||
| this._childObserver = Polymer.dom(this).observeNodes(function(info) { | ||
| info.addedNodes.forEach(function(n) { | ||
| if (n.nodeType === Node.ELEMENT_NODE) { | ||
| console.log('added:', n.localName, n.textContent); | ||
| } | ||
| }); | ||
| info.removedNodes.forEach(function(n) { | ||
| if (n.nodeType === Node.ELEMENT_NODE) { | ||
| console.log('removed:', n.localName, n.textContent); | ||
| } | ||
| }); | ||
| }); | ||
| this._contentObserver = Polymer.dom(this.$.c).observeNodes(function(info) { | ||
| info.addedNodes.forEach(function(n) { | ||
| if (n.nodeType === Node.ELEMENT_NODE) { | ||
| console.log('%c content added:', 'color: blue;', n.localName, n.textContent); | ||
| } | ||
| }); | ||
| info.removedNodes.forEach(function(n) { | ||
| if (n.nodeType === Node.ELEMENT_NODE) { | ||
| console.log('%c content removed:', 'color: blue;', n.localName, n.textContent); | ||
| } | ||
| }); | ||
| }, true); | ||
| }, | ||
|
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| unobserve: function() { | ||
| Polymer.dom(this).unobserveNodes(this._childObserver); | ||
| Polymer.dom(this).unobserveNodes(this._contentObserver); | ||
| } | ||
| }); | ||
| </script> | ||
| </dom-module> | ||
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| <dom-module id='test-content'> | ||
| <template> | ||
| <test-inner id="inner">[<content id="ip" select=".b"></content>]</test-inner> | ||
| </template> | ||
| <script> | ||
| (function() { | ||
| Polymer({ | ||
| is:'test-content' | ||
| }); | ||
| })(); | ||
| </script> | ||
| </dom-module> | ||
|
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| <test-content id="content"> | ||
| <div class="a b">content A</div> | ||
| <div class="a b">content B</div> | ||
| </test-content> | ||
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| <br><br> | ||
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| <script> | ||
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| function makeNode(text) { | ||
| var d = document.createElement('div'); | ||
| d.textContent = text;; | ||
| return d; | ||
| } | ||
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| Polymer.dom.flush(); | ||
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| // setTimeout(function() { | ||
| console.group('test dynamic'); | ||
| var d = makeNode('dynamic!'); | ||
| Polymer.dom.flush(); | ||
| Polymer.dom(content).appendChild(d); | ||
| Polymer.dom.flush(); | ||
| Polymer.dom(content).removeChild(d); | ||
| Polymer.dom.flush(); | ||
| d = makeNode('1'); | ||
| Polymer.dom(d).classList.add('b'); | ||
| Polymer.dom(content).appendChild(d); | ||
| Polymer.dom.flush(); | ||
| Polymer.dom(d).classList.add('a'); | ||
| Polymer.dom(Polymer.dom(d).parentNode).notifyObservers(); | ||
| Polymer.dom(content.$.inner).appendChild(makeNode('2')); | ||
| Polymer.dom.flush(); | ||
| d = makeNode('-1'); | ||
| Polymer.dom(d).classList.add('b'); | ||
| Polymer.dom(d).classList.add('a'); | ||
| Polymer.dom(content).insertBefore(d, Polymer.dom(content).firstChild); | ||
| Polymer.dom.flush(); | ||
| Polymer.dom(content.$.inner).insertBefore(makeNode('-2'), Polymer.dom(content.$.inner).firstChild); | ||
| Polymer.dom.flush(); | ||
| Polymer.dom(content.$.inner).removeChild(Polymer.dom(content.$.inner).firstChild); | ||
| Polymer.dom(content.$.inner).removeChild(Polymer.dom(content.$.inner).lastChild); | ||
| Polymer.dom(content).removeChild(Polymer.dom(content).firstChild); | ||
| Polymer.dom(content).removeChild(Polymer.dom(content).lastChild); | ||
| Polymer.dom.flush(); | ||
| console.groupEnd('test dynamic'); | ||
| // }, 1000); | ||
| </script> | ||
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| </body> | ||
| </html> |