Merge pull request #2185 from rhyzx/boolean-attributes

Boolean attributes

src/directives/public/bind.js

@@ -132,9 +132,9 @@ export default {
         }
         setClass(el, value)
       } else if (xlinkRE.test(attr)) {
-        el.setAttributeNS(xlinkNS, attr, value)
+        el.setAttributeNS(xlinkNS, attr, value === true ? '' : value)
       } else {
-        el.setAttribute(attr, value)
+        el.setAttribute(attr, value === true ? '' : value)
       }
     } else {
       el.removeAttribute(attr)

test/unit/specs/directives/public/bind_spec.js

@@ -24,6 +24,8 @@ describe('v-bind', function () {
     expect(el.hasAttribute('test')).toBe(false)
     dir.update(false)
     expect(el.hasAttribute('test')).toBe(false)
+    dir.update(true)
+    expect(el.getAttribute('test')).toBe('')
     dir.update(0)
     expect(el.getAttribute('test')).toBe('0')
   })