How to jump to the page and keep the form data in vue

Vue is a modern, easily extensible JavaScript framework that enables developers to easily build single page applications (SPA). An important feature of the Vue framework is the ability to dynamically update page content without refreshing the entire page, which can improve application response speed and user experience. However, during the development process, it is relatively difficult to solve data transfer problems. This article will introduce how to maintain form data after Vue jumps to the page.

Client Side Data Storage

In Vue, we usually use client side data storage (Client Side Data Storage) to solve data transfer problems. You can store data in memory, in cookies, in browser cache (localStorage and sessionStorage), or using a database. For the purposes of this article, we’ll focus primarily on browser caching. Using the browser cache, the client's data can be saved in the client's browser, and when the user visits the same site, the data can be automatically restored from the browser cache.

Vue-router

In Vue projects, Vue-router is usually used to manage routing to achieve jumps between pages. Vue-router is the routing manager officially provided by Vue, which can help us quickly build single-page web applications.

Vue-router’s pre-hook function

The pre-hook function in Vue-router is a function that is executed before the route jumps. Vue-router provides a variety of pre-hook functions. Here we use the beforeRouteLeave function to perform some operations before leaving the current route, such as saving form data.

Use the beforeRouteLeave function to save form data

We can save the form data in the beforeRouteLeave function and store the data in sessionStorage after leaving the current page. The next time the user visits the page, we can restore the data directly from sessionStorage.

The following is an example:

beforeRouteLeave (to, from, next) {
  // 保存表单数据
  sessionStorage.setItem('form_data', JSON.stringify(this.form));
  next();
}

Use the created hook function to restore form data

We can restore the form data in the created hook function and load the data from sessionStorage to the application in process.

The following is an example:

created () {
  // 从 sessionStorage 中恢复表单数据
  const formDataString = sessionStorage.getItem('form_data');
  if (formDataString) {
    this.form = JSON.parse(formDataString);
  }
}

It can be seen that using the beforeRouteLeave and created hook functions can easily implement the function of Vue to maintain form data after jumping to the page, and it can also improve the application user experience.

Practical Application

The above is a simple example. In actual applications, we can use it flexibly according to needs. For example, save form data on the editing page and restore the data when returning; save data on a new page, but do not use sessionStorage on the current page, and then restore the data after going to other pages; use localStorage on the page to save data for a long time, etc.

Conclusion

Vue retaining form data after jumping to the page is a common requirement, which can be easily achieved using client-side data storage and pre-hook functions. In actual development, we can flexibly use these methods according to needs to improve the user experience of the application.

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