Polymer Elements in Dart Packages -

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i have dart package contains 3 extensions of polymer element: tp-element-a, tp-element-b , tp-element-c. each of these elements there html-file containing markup of element , dart file code. tp-element-c contains references tp-element-a , tp-element-b. package structure looks this:

testpolymer pubspec.yaml - packages - asset     tp-element-a.html     tp-element-b.html     tp-element-c.html - lib     testpolymer.dart     tp-element-a.dart     tp-element-b.dart     tp-element-c.dart - web     index.html

the definitiopn of polymer elements simple:

tp-element-a.html

<polymer-element name="tp-element-a"> <template> <h1>hello element a</h1> </template> <script type="application/dart" src="../lib/tp-element-a.dart"></script> </polymer-element>

tp-element-a.dart

part of testpolymer;  @customtag("tp-element-a") class tpelementa extends polymerelement {   tpelementa.created() : super.created() {} }

i skip definitions of tp-element-b , tp-element-c. similar. difference tp-element-c uses tp-element-a , tp-element-b within template markup.

the file testpolymer.dart contains definition of library testpolymer:

library testpolymer;  import "package:polymer/polymer.dart";  part "tp-element-a.dart"; part "tp-element-b.dart"; part "tp-element-c.dart";

in yaml file decalre dependency polymer package , add polymer transformer:

name: testpolymer description: pub package dependencies:   polymer: transformers: - polymer:     entry_points: web/index.html

last not least index.html contains link tp-element-c.html , uses element:

<html>   <head>     <link rel="import" href="../asset/tp-element-c.html">     <script type="application/dart">export 'package:polymer/init.dart';</script>     <script src="packages/browser/dart.js"></script>   </head>   <body>     <div id="sample_container_id">       <tp-element-c></tp-element-c>     </div>   </body> </html>

so far good. when run pub build errors, caused organizing dart files in library:

packages/testpolymer/tp-element-a.dart:1:1: directive not allowed here. part of testpolymer;  packages/testpolymer/tp-element-a.dart:4:26: class can't extend malformed type. try correcting malformed type annotation or removing 'extends' clause. class tpelementa extends polymerelement {  packages/testpolymer/tp-element-a.dart:3:2: cannot resolve 'customtag'. @customtag("tp-element-a")

so how possible include code polymer elements in libraries?

if don't organize polymer code library, error in tp-element-c.dart, imports (if no library used) tp-element-a.dart , tp-element-b.dart directly:

the imported libraries 'tp-element-a.dart' , 'tp-element-b.dart' should not have same name ''

how can resolve puzzle?

you last error message, if don't have in each dart file unique library uniquename; definitions. in case names be: tp-element-a, tp-element-b etc.


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