自定义组件中使用 cover-view
自定义组件中使用 cover-view报如下错误：
Mon Mar 19 2018 00:24:38 GMT+0800 (CST) 渲染层错误
VM3945:2 webviewScriptError
Cannot read property ‘replace’ of undefined;[Exparser] [Error] [Component] Lifetime Method Error @ wx-cover-view#attached
TypeError: Cannot read property ‘replace’ of undefined
at o.attached (http://127.0.0.1:49651/\_\_pageframe\_\_/\_\_dev\_\_/WAWebview.js:8:5912)
at r.safeCallback (http://127.0.0.1:49651/\_\_pageframe\_\_/\_\_dev\_\_/WAWebview.js:5:27178)
at r.call (http://127.0.0.1:49651/\_\_pageframe\_\_/\_\_dev\_\_/WAWebview.js:5:26942)
at t (http://127.0.0.1:49651/\_\_pageframe\_\_/\_\_dev\_\_/WAWebview.js:6:7737)
at t (http://127.0.0.1:49651/\_\_pageframe\_\_/\_\_dev\_\_/WAWebview.js:6:8050)
at t (http://127.0.0.1:49651/\_\_pageframe\_\_/\_\_dev\_\_/WAWebview.js:6:7992)
at t (http://127.0.0.1:49651/\_\_pageframe\_\_/\_\_dev\_\_/WAWebview.js:6:8050)
at t (http://127.0.0.1:49651/\_\_pageframe\_\_/\_\_dev\_\_/WAWebview.js:6:8050)
at t (http://127.0.0.1:49651/\_\_pageframe\_\_/\_\_dev\_\_/WAWebview.js:6:8050)
at t (http://127.0.0.1:49651/\_\_pageframe\_\_/\_\_dev\_\_/WAWebview.js:6:7992)
(anonymous) @ VM3945:2
VM3947:1 Mon Mar 19 2018 00:24:38 GMT+0800 (CST) 渲染层错误
VM3947:2 [Exparser] [Error] [Component] Lifetime Method Error @ wx-cover-view#attached
(anonymous) @ VM3947:2
VM3948:1 Mon Mar 19 2018 00:24:38 GMT+0800 (CST) 渲染层错误
VM3948:2 TypeError: Cannot read property ‘replace’ of undefined
at o.attached (:49651/__pageframe__/__dev__/WAWebview.js:8)
at r.safeCallback (:49651/__pageframe__/__dev__/WAWebview.js:5)
at r.call (:49651/__pageframe__/__dev__/WAWebview.js:5)
at t (:49651/__pageframe__/__dev__/WAWebview.js:6)
at t (:49651/__pageframe__/__dev__/WAWebview.js:6)
at t (:49651/__pageframe__/__dev__/WAWebview.js:6)
at t (:49651/__pageframe__/__dev__/WAWebview.js:6)
at t (:49651/__pageframe__/__dev__/WAWebview.js:6)
at t (:49651/__pageframe__/__dev__/WAWebview.js:6)
at t (:49651/__pageframe__/__dev__/WAWebview.js:6)
(anonymous) @ VM3948:2
