add tests for lwc

Author: ekashida

README.md

@@ -31,6 +31,8 @@ npm start
 - [Hybrids](https://github.com/webcomponents/custom-elements-everywhere/tree/master/libraries/hybrids)
 - [Hyperapp](https://github.com/webcomponents/custom-elements-everywhere/tree/master/libraries/hyperapp)
 - [HyperHTML](https://github.com/webcomponents/custom-elements-everywhere/tree/master/libraries/hyperhtml)
+- [Lit](https://github.com/webcomponents/custom-elements-everywhere/tree/master/libraries/lit)
+- [LWC](https://github.com/webcomponents/custom-elements-everywhere/tree/master/libraries/lwc)
 - [Mithril](https://github.com/webcomponents/custom-elements-everywhere/tree/master/libraries/mithril)
 - [Omi](https://github.com/webcomponents/custom-elements-everywhere/tree/master/libraries/omi)
 - [Polymer](https://github.com/webcomponents/custom-elements-everywhere/tree/master/libraries/polymer)

docs/index.js

@@ -28,6 +28,7 @@ const libraryMap = {
   hyperapp: "Hyperapp",
   hyperhtml: "hyperHTML",
   lit: "Lit",
+  lwc: "LWC",
   mithril: "Mithril",
   omi: "Omi",
   polymer: "Polymer",

libraries/lwc/.npmrc

@@ -0,0 +1 @@
+registry=https://registry.npmjs.org

libraries/lwc/karma.conf.js

@@ -15,9 +15,8 @@
  * limitations under the License.
  */
 
-var webpack = require('webpack');
-var path = require('path');
-var LwcWebpackPlugin = require('lwc-webpack-plugin');
+const path = require('path');
+const LwcWebpackPlugin = require('lwc-webpack-plugin');
 
 module.exports = function(config) {
   config.set({

libraries/lwc/meta/expectedResults.json

@@ -1,19 +1,19 @@
 {
-    "success": 30,
-    "failed": 0,
+    "success": 24,
+    "failed": 8,
     "skipped": 0,
     "error": false,
     "disconnected": false,
-    "exitCode": 0,
-    "score": 100,
+    "exitCode": 1,
+    "score": 89,
     "basicSupport": {
         "total": 16,
         "failed": 0,
         "passed": 16
     },
     "advancedSupport": {
-        "total": 14,
-        "failed": 0,
-        "passed": 14
+        "total": 16,
+        "failed": 8,
+        "passed": 8
     }
 }

libraries/lwc/meta/issues.json

@@ -1 +1,7 @@
-[]
+[
+    {
+      "link": "https://github.com/salesforce/lwc/issues/1904",
+      "title": "Unnecessary event name restrictions (such as prohibiting hyphens) should be removed",
+      "meta": "#1904 opened May 28, 2020 by JanMiksovsky"
+    }
+  ]

libraries/lwc/meta/summary.md

@@ -1,11 +1,14 @@
-<h4 id="vue-handling-data">Handling data</h4>
+<h4 id="lwc-handling-data">Handling data</h4>
 
-By default, Vue passes all data to Custom Elements as attributes. However, Vue
-also provides syntax to instruct its bindings to use properties instead. To bind
-to a Custom Element property use <code>:foo.prop="bar"</code>.
+When passing data to a custom element, LWC takes a properties-if-available approach where attributes
+are set by default, but properties are set when they exist. This heuristical approach involves a
+runtime check to see whether a property is defined, and as such, data will be passed as an attribute
+if the custom element has not been upgraded. It is the responsibility of the component author to
+handle this scenario.
 
-<h4 id="vue-handling-events">Handling events</h4>
+<h4 id="lwc-handling-events">Handling events</h4>
 
-Vue can listen to native DOM events dispatched from Custom Elements. Its
-declarative event bindings only support lowercase and kebab case events. To
-listen for any events named with capital letters you must write imperative code.
+LWC has no restrictions on event names when listening for events imperatively via the
+`addEventListener()` API. When listening for events declaratively in the template, LWC supports
+neither arbitrarily capitalized event names (camelCase, CAPSCase, PascalCase, etc.) nor kebab-cased
+names.