introduction
Vue Router provides a complete routing solution for applications, including data transfer between components. By passing parameters from the routing component, we can easily pass the necessary data when navigating to a new page, which is especially important for scenarios where data needs to be loaded based on user actions or current status. This article will explore in-depth how to use Vue Router to pass parameters between routing components and demonstrate its implementation through multiple examples.
Basic concepts and functions
Dynamic routing parameters
Dynamic routing parameters refer to the use of path parameters to specify part of the routing path when defining a route. These parameters can be embodied during actual navigation and can be passed$Objects are retrieved in the target component.
Query string parameters
In addition to dynamic routing parameters, we can also pass parameters by querying strings. This method is often used to pass information that is not required to be part of the URL path.
Example 1: Use dynamic routing parameters
Suppose we have an application that needs to display the profile page for each user. We can define a route with dynamic parameters to achieve this.
// Import Vue and VueRouterimport Vue from 'vue';
import VueRouter from 'vue-router';
import UserProfile from './components/';
(VueRouter);
// Create a router instanceconst router = new VueRouter({
routes: [
{ path: '/user/:id', component: UserProfile }
]
});
new Vue({
router,
render: h => h(App)
}).$mount('#app');
Next, we need to access this parameter in the UserProfile component:
<template>
<div>
<p>User ID: {{ $ }}</p>
</div>
</template>
<script>
export default {
created() {
('User ID:', this.$);
}
};
</script>
In this example, when we navigate to/user/123When the component will display information with the user ID of 123.
Example 2: Use query string parameters
If we need to pass some additional information, such as the user's source page or other non-critical information, we can use the query string.
// Update router configurationconst router = new VueRouter({
routes: [
{ path: '/user/:id', component: UserProfile }
]
});
// Append query string when navigatingthis.$({ name: 'UserProfile', params: { id: '123' }, query: { source: 'homepage' } });
In the UserProfile component, we can use$To access these parameters:
<script>
export default {
created() {
('Query Parameters:', this.$);
}
};
</script>
Example 3: Pass parameters through the route guard
Sometimes we need to execute some logic before navigation, such as checking user permissions or getting data from the server. This can be done using routing guards.
((to, from, next) => {
if ( === 'UserProfile') {
getUserData().then(user => {
//Storing data in component props = user;
next({ ...to });
}).catch(error => {
next(false); // Navigate to the error page });
} else {
next();
}
});
In the UserProfile component, we can usebeforeRouteEnterThe guards come to receive these data:
export default {
beforeRouteEnter(to, from, next) {
next(vm => {
= ;
});
},
computed: {
user() {
return this.$;
}
}
};
Example 4: Using named routing
Named routing can make our code more readable and easy to maintain. We can replace hardcoded path strings by naming the route.
const router = new VueRouter({
routes: [
{ path: '/user/:id', name: 'UserProfile', component: UserProfile }
]
});
this.$({ name: 'UserProfile', params: { id: '123' }});
Example 5: Use multiple parameter transfer methods in combination
In actual development, we may use a combination of multiple parameter passing methods to meet complex needs. For example, we may need to pass both dynamic parameters and query strings.
this.$({ name: 'UserProfile', params: { id: '123' }, query: { source: 'homepage' }});
In the UserProfile component, we can access these two types of parameters at the same time:
export default {
created() {
('Dynamic Parameter:', this.$);
('Query String:', this.$);
}
};
Tips in actual development
- When designing routes, try to make the path simple and clear, and avoid overly long paths.
- Using named routing can improve the readability and maintainability of your code.
- Taking into account performance factors, avoid large amounts of data acquisition operations every time you navigate.
- When using dynamic parameters, remember to verify the parameters to ensure their validity.
Through the above examples and tricks, we can see that Vue Router provides multiple ways to implement data transfer between routing components. Using these features rationally can make our applications more flexible and efficient. Hopefully this article will help you better apply these technologies in future projects.
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