[英]uncaught TypeError: Cannot read properties of undefined (reading 'modelValue') in vue 3
[英]Vue 3 + Vue Router 4: TypeError: Cannot read properties of undefined (reading 'push')
我正在使用 Vue 3 + Vue 路由器 4 + TypeScript。
而且我正在尝试使用router.push()
但我不断收到控制台错误: Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'push')
。
我究竟做错了什么?
更新:如果我运行console.log(router);
它返回undefined
。 因此我认为这是问题所在,但为什么会发生这种情况以及如何解决呢?
这是我的router/index.ts
代码:
import { createRouter, createWebHistory, RouteRecordRaw } from "vue-router";
const routes: Array<RouteRecordRaw> = [
{
path: "/",
name: "Welcome",
component: () =>
import(/* webpackChunkName: "Welcome" */ "../views/Welcome.vue"),
},
{
path: "/chatroom",
name: "Chatroom",
component: () =>
import(/* webpackChunkName: "Chatroom" */ "../views/ChatRoom.vue"),
},
];
const router = createRouter({
history: createWebHistory(process.env.BASE_URL),
routes,
});
export default router;
这是生成错误router.push()
错误的 Vue 文件。 我尝试使用命名路由和路径,都给出相同的错误:
<template>
<div class="welcome container">
<p>Welcome</p>
<div v-if="showLogin">
<LoginFormVue @loggedIn="enterChat" />
<p>No account yet? <span @click="showLogin = false">Signup</span></p>
</div>
<div v-else>
<SignUpFormVue @signedUp="enterChat" />
<p>Alredy registered? <span @click="showLogin = true">Login</span></p>
</div>
</div>
</template>
<script setup lang="ts">
import { ref } from "vue";
import SignUpFormVue from "@/components/SignUpForm.vue";
import LoginFormVue from "@/components/LoginForm.vue";
import { useRouter } from "vue-router";
const showLogin = ref(false);
const enterChat = () => {
const router = useRouter();
console.log(router); // <-- This returns undefined. Why??
router.push({ name: "Chatroom" });
//router.push("/chatroom"); <-- This also doesn't work, gives the same error
};
</script>
弄清楚了。
const router = useRouter();
行需要在enterChat
function 之外。 由于某种原因,您无法在您希望使用的同一 function 内创建router
实例。
所以它应该是这样的:
const router = useRouter(); //<-- router declared outside function: CORRECT
const enterChat = () => {
router.push({ name: "Chatroom" });
};
而不是这样:
const enterChat = () => {
const router = useRouter();//<-- router declared inside function: INCORRECT
router.push({ name: "Chatroom" });
};
这是完整的更新文件以供参考:
<template>
<div class="welcome container">
<p>Welcome</p>
<div v-if="showLogin">
<LoginFormVue @loggedIn="enterChat" />
<p>No account yet? <span @click="showLogin = false">Signup</span></p>
</div>
<div v-else>
<SignUpFormVue @signedUp="enterChat" />
<p>Alredy registered? <span @click="showLogin = true">Login</span></p>
</div>
</div>
</template>
<script setup lang="ts">
import SignUpFormVue from "@/components/SignUpForm.vue";
import LoginFormVue from "@/components/LoginForm.vue";
import { ref } from "vue";
import { useRouter } from "vue-router";
const showLogin = ref(false);
const router = useRouter();
const enterChat = () => {
console.log(router);
router.push({ name: "Chatroom" });
};
</script>
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