Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components-chromium/polymer/src/lib/bind/demo/src/bind-demo-extracted.js

Index: third_party/polymer/v0_8/components-chromium/polymer/src/lib/bind/demo/src/bind-demo-extracted.js
diff --git a/third_party/polymer/v0_8/components-chromium/polymer/src/lib/bind/demo/src/bind-demo-extracted.js b/third_party/polymer/v0_8/components-chromium/polymer/src/lib/bind/demo/src/bind-demo-extracted.js
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index 0000000000000000000000000000000000000000..28419e451eee8cd304cebf7106792f543f0347e9
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+++ b/third_party/polymer/v0_8/components-chromium/polymer/src/lib/bind/demo/src/bind-demo-extracted.js
@@ -0,0 +1,78 @@
+
+
+  using(['bind'], function(Bind) {
+
+    var out = document.querySelector('#bd');
+    out.innerHTML += '<hr><h3>bind demo</h3><hr>';
+    
+    // phase one: prototyping
+
+    var model = {};
+
+    Bind.prepareModel(model);
+
+    // 'observer' effects are called if foo changes value as fx(foo, old)
+
+    Bind.addPropertyEffect(model, 'foo', 'observer', 'fooChange');
+    Bind.addPropertyEffect(model, 'foo', 'observer', 'fooWork');
+
+    model.fooChange = function(foo) {
+      out.innerHTML += '<b>fooChange</b>: effect of changing foo to ' + foo + '\n';
+      console.log('fooChange: effect of changing foo to %d', foo);
+    };
+
+    model.fooWork = function(foo) {
+      out.innerHTML += '<b>fooWork</b>: effect of changing foo to ' + foo + '\n';
+      console.log('fooWork: effect of changing foo to %d', foo);
+    };
+
+    // 'compute' effect sets the value of bar to the result of computeBar when
+    // foo changes value
+
+    /*
+    Bind.addPropertyEffect(model, 'foo', 'compute', {
+      method: 'computeBar',
+      property: 'bar'
+    });
+    */
+    Bind.addComputedPropertyEffect(model, 'bar', 'computeFooTimes2(foo)');
+
+    model.computeFooTimes2 = function(foo) {
+      var foo2 = foo * 2;
+      out.innerHTML += '<b>computeFooTimes2</b>: calculated ' + foo2 + ' as an effect of changing foo to ' + foo + '\n';
+      console.log('computeFooTimes2: calculated %d as effect of changing foo to %d', foo2, foo);
+      return foo2;
+    };
+
+    // custom effect
+
+    Bind.addBuilder('async', function(model, property, effect) {
+      var fn = function() {
+        var flag = '_propertyTask';
+        clearTimeout(this[flag]);
+        this[flag] = setTimeout(function() {
+          this.effect(this.property);
+          this[flag] = 0;
+        }.bind(this));
+      };
+      var code = fn.toString().split('\n').slice(1, -1).join('\n');
+      return code.replace(/property/g, property).replace(/effect/g, effect);
+    });
+
+    Bind.addPropertyEffect(model, 'foo', 'async', 'asyncFoo');
+
+    model.asyncFoo = function(foo) {
+      out.innerHTML += '<b>asyncFoo</b>: effect of changing foo to ' + foo + '\n';
+      console.log('asyncFoo: effect of changing foo to %d', foo);
+    };
+
+    // phase two: instancing
+
+    Bind.prepareInstance(model);
+    Bind.createBindings(model);
+
+    model.foo = 3;
+    model.foo = 6;
+
+  });
+