A.yamn add vue-router@4B.node install vue-router@4C.npm Install vueRouter@4D.npm I vue-router@4
A.beforeEach()方法中接收to、from、next形參B.beforeEach()方法中to參數(shù)表示目標(biāo)路由對(duì)象C.beforeEach()方法中from參數(shù)表示當(dāng)前導(dǎo)航正要離開的路由對(duì)象D.beforeEach()方法中若省略next參數(shù),則不允許用戶訪問任何一個(gè)路由
A.KeepAlive組件通過< KcepAlive>標(biāo)簽來定義B.若只想要對(duì)應(yīng)組件名的組件被緩存,則需要通過< KeepAlive>標(biāo)簽的exclude屬性來實(shí)現(xiàn)C.在< KeepAlive>標(biāo)簽上添加max屬性用來設(shè)置最多可以緩存的組件實(shí)例個(gè)數(shù)D.只要是被< KeepAlive>標(biāo)簽包裹的組件就不會(huì)銷毀