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November 24, 2015 18:24
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Example of the Polymer `down` gesture memory leak
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Polymer</title> | |
| <script src="http://polygit.org/components/webcomponentsjs/webcomponents-lite.js"></script> | |
| <link href="http://polygit.org/polymer+v1.2.3/components/polymer/polymer.html" rel="import"> | |
| </head> | |
| <body> | |
| <dom-module id="x-element"> | |
| <template> | |
| <button id="remove">Remove Element</button> | |
| </template> | |
| </dom-module> | |
| <script> | |
| HTMLImports.whenReady(function () { | |
| Polymer({ | |
| is: 'x-element', | |
| listeners: { | |
| 'down': 'doNothing', | |
| 'remove.tap': 'removeElement' | |
| }, | |
| doNothing: function () { | |
| console.log('->movefn-><function scope>->first closure: has a reference to the leaked <button> element.'); | |
| console.log('->upfn-><function scope>->first closure: has a reference to the leaked <button> element.'); | |
| console.log(Polymer.Gestures.gestures.down.info); | |
| console.log(''); | |
| console.log('The `down` is what is causing the leak.'); | |
| }, | |
| removeElement: function () { | |
| Polymer.dom(Polymer.dom(this).parentNode).removeChild(this); | |
| } | |
| }); | |
| }); | |
| </script> | |
| <x-element></x-element> | |
| </body> | |
| </html> |
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