Having a polymer project using the material color definitions in import 'package:polymer_elements/color.dart'; The references to css styling e.g. var(--paper-green-300); works ok, when they are placed in the <style></style> section for the element, but when I move this to the style.css, they aren't found. I have tried with different combinations of include in index.html and index.dart. E.g. in index.html at <head> section <link rel="import" href="packages/polymer_elements/color.html"> but doesn't seems to do the trick. Anyone who have experience with similar issues?
Of course not a high prio project killer, simple to use the hard coded values or leave the definitions in the <style> section for every element. But this way things will be more tidy.
Environment
Dart version 1.14.0
WebStorm 11.0.3
From pubspec.yaml:
environment:
sdk: '>=1.9.0 <2.0.0'
dependencies:
polymer: ^1.0.0-rc.15
web_components: ^0.12.0
polymer_elements: 1.0.0-rc.8
browser: ^0.10.0
reflectable: ^0.5.0
polymer_interop: ^1.0.0-rc.5
CSS variables in Polymer only work in <style is="custom-style"> and therefore not in .css files.
is="custom-style" is implicit for style tags within Polymer elements and can and should be omitted.
Related
The boildown of the construct, is like this. Having a polymer element:
<dom-module id="demo-element">
<template>
<span><content></content></span>
<span><content></content></span>
</template>
</dom-module>
This only gives one occurrence of content. e.g.
<demo-element>Hello</demo-element> only gives "Hello" and not "HelloHello". Using a property with binding, gives the expected. Seems like some small detail missing, anyone who have been in similar parts?
Environment:
Dart version 1.14.0
WebStorm 11.0.3
From pubspec.yaml:
environment:
sdk: '>=1.9.0 <2.0.0'
dependencies:
polymer: ^1.0.0-rc.15
web_components: ^0.12.0
polymer_elements: 1.0.0-rc.8
browser: ^0.10.0
reflectable: ^0.5.0
polymer_interop: ^1.0.0-rc.5
That's by design. <content> doesn't produce elements, it just projects them.
More than one <content> without a selector doesn't do anything. The first one "grabs" all children and projects them where it is placed.
You can have more than one <content> tag but then they should have different selectors like
<header-elem>
<content select=".header"></content>
</header-elem>
<drawer-elem>
<content select=".drawer"></content>
</drawer-elem>
<body-elem>
<content></content>
</body-elem>
used like
<my-component>
<div>body</div>
<div class"header">header</div>
<div class"drawer">header</div>
</my-component>
then the first <div> is projected to the last <content> element because it doesn't match any specific selector, the other divs are projected to the <content> tags with the matching selectors.
Is it possible to mix a normal Dart HTML application with Angular Dart 2 and have Angular Dart 2 run in certain parts of the application and not other parts?
I've attempted that, but it seems Angular is injecting itself into every page.
index1.html:
<script type="application/dart" src="main.dart"></script>
<script data-pub-inline src="packages/browser/dart.js"></script>
</body>
index2.html:
<my-app>Loading...</my-app>
<script async src="main2.dart" type="application/dart"></script>
<script async src="packages/browser/dart.js"></script>
</body>
main.dart:
// many imports
void main() {
// manual code to hook urls, html etc
}
main2.dart:
import 'package:angular2/angular2.dart';
import 'package:angular2/bootstrap.dart';
#Component(selector: 'my-app', template: '<h1>Testing Angular Dart 2</h1>')
class AppComponent {}
main() {
bootstrap(AppComponent);
}
pubspec.yaml:
...
environment:
sdk: '>=1.0.0 <2.0.0'
dependencies:
...
less_dart: any
browser: any
http: any
event_bus: any
dart_to_js_script_rewriter: any
angular2: 2.0.0-beta.0
transformers:
- dart_to_js_script_rewriter
- $dart2js:
commandLineOptions: [--enable-experimental-mirrors]
- less_dart:
entry_points: [web/styles/main.less, web/styles/test.less]
build_mode: dart
- angular2:
entry_points: web/main2.dart
The angular2 transformer is clearly pointing at main2.dart and only index2.html is importing main2.dart, but when I load index1.html which is importing main.dart, the angular app runs.
Is it possible to do what I want to do or is it a case of all-or-nothing when including Angular Dart 2?
What do you mean by "it seems Angular is injecting itself into every page."? If you have different entry points (index1.html, index2.html, ...) each entry point is an individual application and for each you can enable Angular or not. If this doesn't work it's a bug in some transformer.
so my Polymer.Dart project is running fine in Chromium (running on Dart code) but when I pub upgrade and pub build the sampler-scaffold keeps working but paper-button, paper-dialog, paper-progress... elements are just not showing up!
My HTML file looks like this
<link href='http://fonts.googleapis.com/css?family=Droid+Serif|Open+Sans:400,700' rel='stylesheet' type='text/css'>
<link rel="import" href="packages/paper_elements/paper_button.html">
<link rel="import" href="packages/paper_elements/paper_dialog_transition.html">
<link rel="import" href="packages/paper_elements/paper_dialog.html">
<link rel="stylesheet" href="css/reset.css"> <!-- CSS reset -->
<link rel="stylesheet" href="css/style.css"> <!-- Resource style -->
...
<paper-button id="infoUPC" class="cd-read-more" raised>Read more</paper-button>
...
<script src="education.dart" type="application/dart"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="js/main.js"></script> <!-- Resource jQuery -->
<script src="js/modernizr.js"></script> <!-- Modernizr -->
education.dart
import 'package:polymer/polymer.dart';
import 'dart:html';
import 'package:paper_elements/paper_dialog.dart';
main() {
initPolymer().run(() {
Polymer.onReady.then((_) {
querySelector('#infoFHV').onClick.listen(
(_) => toggleDialog('fhv'));
querySelector('#infoUPC').onClick.listen(
(_) => toggleDialog('upc'));
querySelector('#infoTU').onClick.listen(
(_) => toggleDialog('tu'));
});
});
}
toggleDialog(language) =>
(querySelector('paper-dialog[edu=$language]') as PaperDialog)
.toggle();
pubspec.yaml
name: polydart_resume
version: 0.0.1
author: Shady
description: Test app
dependencies:
core_elements: '>=0.3.2 <0.5.0'
custom_element_apigen: ">= 0.1.1 <0.2.0"
polymer: ">=0.14.0 <0.16.0"
web_components: ">=0.9.0 <0.10.0"
paper_elements: ">=0.5.0 <0.6.0"
transformers:
- polymer:
entry_points:
- web/index.html
pub build does not give me any warnings or errors on these files, but I'm surely missing something right?
You have two entry pages index.html and languages.html. Only languages.html calls your custom main() but only index.html is in your pubspec.yaml transformer configuration.
index.html will invoke the default main() method provided by Polymer but not your custom main() because of this script tag
<script type="application/dart">export 'package:polymer/init.dart';</script>
languages.html has the correct script tag
<script type="application/dart" src="languages.dart"></script>
but this doesn't work as expected because languages.html is not listed in your Polymer transformer entry_points configuration
transformers:
- polymer:
entry_points:
# - web/index.html
- web/languages.html
From the comments:
Q: Do you load languages.html from a link in drawer.html (<core-item label="Languages" url="chapters/languages.html"></core-item>)? – Günter Zöchbauer 25 mins ago
A: Yessir thats exactly what I'm doing.
This isn't how one usually develops applications in Dart. You can, but Dart is for SPA (http://en.wikipedia.org/wiki/Single-page_application).
If you load another page from a Dart application this is like launching an entirly different application. Each page (app) loaded this way needs all parts of a Polymer application to work.
Usually in Dart you have only one entry page (entry_point) and when you want to change what is shown to the user (a new view) you replace the content in the current page instead of loading another one (this is for example where Polymer elements are handy for, you just remove one element (view) and add another one).
Dart also has a rather large boilerplate code size which has to be loaded each time you load another page which is rather inefficient.
Because my problem was not really code related but more fundamental, I found a sample project on www.polymer-project.org where one can see a recommended routing method. I find the introduction docs on polymer don't cover this topic good enough...
I am trying to build an app with Dart and Polymer. But polymer scripts seem to be using eval() in web_components/platform.js:32. Has anyone managed to do this? I tried to change CSP but that helped in first place.
Does anyone have a working example?
Regards and Thanks
Robert
EDIT
manifest.json:
{
"name": "Animatr app",
"version": "1",
"author": "Robert Hartung",
"manifest_version": 2,
"icons": {"128": "animatr_icon.png"},
"app": {
"background": {
"scripts": ["background.js"]
}
},
"content_security_policy": "script-src 'self' unsafe-inline;"
}
main.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Animatr app</title>
<link rel="stylesheet" href="animatr_chrome_app.css">
<link rel="import" href="packages/polymer/polymer.html">
</head>
<body>
<script src="packages/chrome/bootstrap.js" defer></script>
<script src="my_chrome_app.dart" type="application/dart;component=1"></script>
</body>
</html>
ERROR:
Refused to evaluate a string as JavaScript because 'unsafe-eval' is not an allowed source of script in the following Content Security Policy directive: "default-src 'self' chrome-extension-resource:". Note that 'script-src' was not explicitly set, so 'default-src' is used as a fallback. (chrome-extension://ofkfcbfhgkoglbgldcdokficikimdjji/packages/web_components/platform.js:32)
Refused to execute inline script because it violates the following Content Security Policy directive: "default-src 'self' chrome-extension-resource:". Either the 'unsafe-inline' keyword, a hash ('sha256-...'), or a nonce ('nonce-...') is required to enable inline execution. Note also that 'script-src' was not explicitly set, so 'default-src' is used as a fallback.
pubspec.yaml:
name: animatr_app
description: A sample Chrome packaged application
dependencies:
chrome: any
polymer: any
transformers:
- chrome
- polymer:
entry_points:
- app/animatr_chrome_app.html
csp: 'true'
The app does not recognize polymer elements correctly.
I have been struggling with the same issue, trying to run the simple wizard generated polymer app (the one with the counter) as a chrome packaged app.
I have finally managed to at least run the javascript built version of it, trying to understand the csp issues.
For many reason, it sounds like it cannot run native as the packaged app is loaded from the file system and not through pub serve. Loading the unpackaged extension from web/build was not working neither as is. The solution was to load xxx.html_bootstrap.dart.precompiled.js instead of xxx.html_bootstrap.js from the generated html file
What i did was:
remove the chrome transformer as the polymer transformer already replace the dart script reference by a javascript script reference
add csp: true in the polymer transformer option (although it did work without it)
to avoid having to change manually the generated html to load the precompiled.js version, I wrote a simple transformer.
I can then load in Chrome (does not have to be Dartium as it is javascript) the unpacked extension from web/build once I run pub build (release mode needed)
I now simply have this warning:
Deprecation: Automatic generation of output for Content Security
Policy is deprecated and will be removed with the next development
release. Use the --csp option to generate CSP restricted output.
which means likely I would have to find a new hack soon...
You can take a look at https://github.com/dart-lang/spark/tree/master/ide for an example Dart Chrome-Packaged-App. They also make heavily use of Polymer.
Maybe this is related https://github.com/Polymer/polymer/issues/252
It seems this is the related Dart bug https://code.google.com/p/dart/issues/detail?id=17409
I have a dart package that contains three extensions of polymer element: tp-element-a, tp-element-b and tp-element-c. For each of these elements there is a html-file containing the markup of the element and a dart file for the code. The tp-element-c contains references to the tp-element-a and tp-element-b.
The package structure looks like 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 the polymer elements are very 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 the definitions of tp-element-b and tp-element-c. They are similar. With the only difference that tp-element-c uses the tp-element-a and tp-element-b within its template markup.
The file testpolymer.dart contains the definition of the 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 the yaml file I decalre the dependency to the polymer package and add the polymer transformer:
name: testpolymer
description: A pub package
dependencies:
polymer: any
transformers:
- polymer:
entry_points: web/index.html
Last not least the index.html just contains the link to the tp-element-c.html and uses this 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 so good. But when I run a pub build I get errors, that are probably all caused by organizing the dart files in a library:
packages/testpolymer/tp-element-a.dart:1:1:
Directive not allowed here.
part of testpolymer;
packages/testpolymer/tp-element-a.dart:4:26:
A class can't extend a malformed type.
Try correcting the malformed type annotation or removing the 'extends' clause.
class TpElementA extends PolymerElement {
packages/testpolymer/tp-element-a.dart:3:2:
Cannot resolve 'CustomTag'.
#CustomTag("tp-element-a")
So how is it possible to include the code for polymer elements in libraries?
If I don't organize the polymer code as a library, I get another error in tp-element-c.dart, which imports (if no library is used) the tp-element-a.dart and the tp-element-b.dart directly:
The imported libraries 'tp-element-a.dart' and 'tp-element-b.dart' should not have the same name ''
How can I resolve this puzzle?
You get the last error message, if you don't have in each dart file unique library uniquename; definitions. In your case names could be: tp-element-a, tp-element-b etc.