commit e711257fa20e50e832d2017aed64ea13fae3ba2d
author Viktar Donich <viktard@google.com> Mon Jul 31 14:14:37 2017 -0700
committer Viktar Donich <viktard@google.com> Fri Aug 04 15:41:20 2017 -0700
tree 61a389e61c43af6218dd02be741123ba44e8eaf4
parent a954b9f27340e0c11f5ab0c5f6386a95dd64a077

Low-level helper plugin API for data binding

Utility wrapper for tracking Polymer element properties updates.

Usage example:

``` js
Gerrit.install(plugin => {
  plugin.getDomHook('change-view').onAttached(element => {
    if (!element.content) { return; }
    plugin.attributeHelper(element.content)
      .get('change')
      .then(change => {
        // Is executed once on switching to change view.
      });
    });

  plugin.getDomHook('reply-text').onAttached(element => {
    if (!element.content) { return; }
    plugin.attributeHelper(element.content)
      .bind('text', replyText => {
        // Is called every time reply text changes.
      });
    });

  });
```

Change-Id: Ia95364df58489f71ea1fd591a160b73ac1d60e96

polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html

diff --git a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
index 1236ca4..ca0f372 100644
--- a/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
+++ b/polygerrit-ui/app/elements/shared/gr-js-api-interface/gr-js-api-interface_test.html
@@ -318,6 +318,10 @@
       }
     });
 
+    test('attributeHelper', () => {
+      assert.isOk(plugin.attributeHelper());
+    });
+
     suite('test plugin with base url', () => {
       setup(() => {
         sandbox.stub(Gerrit.BaseUrlBehavior, 'getBaseUrl').returns('/r');