一个报错，怎么找到是哪个页面的报错？

报错如下：

VM32851:1 TypeError: Cannot read property ‘beforeAll’ of undefined

    at WAService.js:12

    at n (WAService.js:6)

    at e (appservice?t=1559205967129:3578)

    at r.registerCallback.t (appservice?t=1559205967129:3578)

    at u.forEach.t (appservice?t=1559205967129:3578)

    at Array.forEach (<anonymous>)

    at appservice?t=1559205967129:3578

    at WebSocket.a.onmessage (appservice?t=1559205967129:3578)

请问我怎么找到beforeAll在那个地方，可不可以在整个项目时搜索找？怎么找？

谢谢！