const state={ currentMenu: null, tabsList: [{ path: '/', name: 'index', title: '首页', }], usershow:[], } const mutations={ usermenu(state,val){ let usershow=[]; state.usershow.push(val); console.log(state); }, //选择标签 选择面包屑 selectMenu(state, val) { console.log(state,val); if (val.name === 'index') { state.currentMenu = null } else { state.currentMenu = val //如果等于-1说明tabsList不存在那么插入,否则什么都不做 let result = state.tabsList.findIndex(item => item.name === val.name) result === -1 ? state.tabsList.push(val) : '' } }, AllClose(state) { state.tabsList = [{ path: '/', name: 'index', label: '首页', }] } }