Error using core-scaffold from polymer JS in the latest Polymer Dart release
Posted By: Anonymous
After hearing that Polymer JS components should work out of the box, which they don’t, I went ahead and tried using some Polymer JS elements in my project.
I needed to remove a few files like demo.html, metadata.html and index.html from all the JS components and replacing with . This is so that the polymer transformer wouldn’t include the unwanted and unneeded files, plus make sure it uses the dart polymer.html file to prevent it being loaded twice.
I included the core-scaffold component, and got this error when running pub serve in the latest Dart Editor.
Build error:
Transform ScriptCompactor on gcanvas|web/index.html threw error: The null object does not have a method '>'.
NoSuchMethodError: method not found: '>'
Receiver: null
Arguments: [7]
dart:core-patch/object_patch.dart 45 Object.noSuchMethod
http://127.0.0.1:39312/packages/polymer_expressions/parser.dart 99:30 Parser._parseBinary
http://127.0.0.1:39312/packages/polymer_expressions/parser.dart 71:72 Parser._parsePrecedence
http://127.0.0.1:39312/packages/polymer_expressions/parser.dart 43:52 Parser._parseExpression
http://127.0.0.1:39312/packages/polymer_expressions/parser.dart 29:28 Parser.parse
http://127.0.0.1:39312/packages/polymer_expressions/parser.dart 12:56 parse
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 524:25 _HtmlExtractor._addExpression
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 509:23 _HtmlExtractor._processNormalElement.<fn>
dart:collection-patch/collection_patch.dart 957 _HashMap&&_LinkedHashMapMixin.forEach
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 495:28 _HtmlExtractor._processNormalElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 453:43 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 465:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 465:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 462:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 465:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 465:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 465:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 32:52 TreeVisitor.visitDocument
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 16:52 TreeVisitor.visit
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 187:61 _extractUsesOfMirrors
dart:async/zone.dart 730 _rootRunUnary
dart:async/zone.dart 864 _RootZone.runUnary
dart:async/future_impl.dart 488 _Future._propagateToListeners.handleValueCallback
dart:async/future_impl.dart 571 _Future._propagateToListeners
dart:async/future_impl.dart 555 _Future._propagateToListeners.handleWhenCompleteCallback.<fn>
dart:async/zone.dart 730 _rootRunUnary
dart:async/zone.dart 864 _RootZone.runUnary
dart:async/future_impl.dart 488 _Future._propagateToListeners.handleValueCallback
dart:async/future_impl.dart 571 _Future._propagateToListeners
dart:async/future_impl.dart 331 _Future._completeWithValue
dart:async/future_impl.dart 393 _Future._asyncComplete.<fn>
dart:async/schedule_microtask.dart 23 _asyncRunCallbackLoop
dart:async/schedule_microtask.dart 32 _asyncRunCallback
dart:isolate-patch/isolate_patch.dart 128 _RawReceivePortImpl._handleMessage
dart:core Object.noSuchMethod
http://127.0.0.1:39312/packages/polymer_expressions/parser.dart 99:30 Parser._parseBinary
http://127.0.0.1:39312/packages/polymer_expressions/parser.dart 71:72 Parser._parsePrecedence
http://127.0.0.1:39312/packages/polymer_expressions/parser.dart 43:52 Parser._parseExpression
http://127.0.0.1:39312/packages/polymer_expressions/parser.dart 29:28 Parser.parse
http://127.0.0.1:39312/packages/polymer_expressions/parser.dart 12:56 parse
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 524:25 _HtmlExtractor._addExpression
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 509:23 _HtmlExtractor._processNormalElement.<fn>
dart:collection _HashMap&&_LinkedHashMapMixin.forEach
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 495:28 _HtmlExtractor._processNormalElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 453:43 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 465:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 465:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 462:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 465:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 465:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 39:50 TreeVisitor.visitElement
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 465:25 _HtmlExtractor.visitElement
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 12:50 TreeVisitor.visit
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 24:49 TreeVisitor.visitChildren
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 30:48 TreeVisitor.visitNodeFallback
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 32:52 TreeVisitor.visitDocument
http://127.0.0.1:39312/packages/html5lib/dom_parsing.dart 16:52 TreeVisitor.visit
http://127.0.0.1:39312/packages/polymer/src/build/script_compactor.dart 187:61 _extractUsesOfMirrors
dart:isolate _RawReceivePortImpl._handleMessage
Build completed with 1 errors.
[web] GET /index.html => Could not find asset gcanvas|web/index.html.
[web] GET /favicon.ico => Could not find asset gcanvas|web/favicon.ico.
I tracked it down to the component core-header-panel, by excluding, then one by one including components found in core-scaffold, till it failed again.
Does anyone know where is this method ‘>’? And what is null? Unless I want to give up on using core-scaffold, this is a blocker. Anyway pasted below is the contents of the bower.json file and the pubspec.yaml, in case it helps.
pubspec.yaml
name: gcanvas
version: 0.0.5
author: James Hurford
description: Canvasing App for doorknocking campaigns.
environment:
sdk: '>=1.0.0 <2.0.0'
dependencies:
browser_detect: any
csvparser: any
http: any
http_server: any
lawndart: any
mime: any
polymer: any
postgresql: any
route: any
uuid: any
dev_dependencies:
scheduled_test: any
transformers:
- polymer:
entry_points:
- web/index.html
bower.json
{
"name": "gcanvas",
"version": "0.0.0",
"authors": [
"James Hurford"
],
"private": true,
"ignore": [
"**/.*",
"node_modules",
"bower_components",
"test",
"tests"
],
"dependencies": {
"x-tag-imports": "x-tag/x-tag-imports",
"polymer-ui-tabs": "polymer/polymer-ui-tabs#~0.3.0",
"core-scaffold": "polymer/core-scaffold#~0.3.1"
},
"resolutions": {
"platform": ">=0.3.0 <1.0.0"
}
}
Thanks
Solution
From looking at the code where the exception was thrown it seems the Polmyer transformer tries to process the HTML file and the binding expressions.
This looks like a bug or missing feature in polymer_expressions and possible the Dart Polymer transformer. I suspect this code in polymer-header-panel <div id="mainContainer" flex?="{{mode !== 'cover'}}" on-scroll="{{scroll}}"> is causing the exception at the unknown operator !==
Answered By: Anonymous
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