-- $state

• $state.go('contact.detail') will go to the 'contact.detail' state
• $state.go('^') will go to a parent state.
• $state.go('^.sibling') will go to a sibling state.
• $state.go('.child') will go to a child state.
• $state.go('.child.grandchild') will go to a grandchild state.

window.top.postMessage 引发的思考

• window.top 是否在所有浏览器中否存在
• window.top.postMessage 浏览器的支持情况 postMessage 浏览器的支持