Tips for effectively passing state from a parent component to a child component without losing it

Question

Tips for effectively passing state from a parent component to a child component without losing it

I created a view displaying all posts with a filter above them. Users can customize their view by selecting different options on the filter, resulting in updated posts being shown.

However, if a user clicks on a post after applying filters, the parent component displaying the posts will be destroyed. When the user tries to navigate back to the main posts page from the specific post page, the filters are not persisted as the parent component is recreated.

One potential solution to this issue is utilizing vuex to store the filter object when it is initially selected. This way, when the user navigates back to the posts page, the filters will still be applied. However, I have encountered challenges and time constraints using this method.

Does anyone have any alternative suggestions? Using keep-alive is not an option for me since its usage seems limited to dynamic components only.

javascript vue.js vuejs2 vue-component vuex

Answer 1

Answer №1

There are two possible solutions for this scenario:

Vuex - This is ideal for managing state, especially when you need to communicate between multiple components. You will need a set of methods to update the filter values in your store. Here's an example:

const store = {
  category: null,
  tag: null,
  date: null
}

const actions = {
  updateFilter({ commit }, payload) {
    commit('updateFilter', payload); // example payload structure: { filterName: 'category', filterValue: 'reviews' }
  }
}

const mutations = {
  updateFilter(state, payload) {
    state[payload.filterName] = payload.filterValue;
  }
}

export default {
  namespaced: true,
  store,
  actions,
  mutations
}

You will then need to bind these actions using @click events on your website. Additionally, you can bind the values from the store with your filters method and use watchers to execute the filtering method when the post list changes.

If you are using Vue router with history mode, you can store your filters using query parameters:

router.push({ path: 'blog', query: { category: 'reviews' }})

This will result in your URL becoming blog?category=reviews. By implementing a method to filter out the post list based on the provided filters upon component creation, you can ensure that the posts display correctly.

An additional benefit of the second option is the ability to share the filtered view with others through the URL.

Answer 2

There are two possible solutions for this scenario:

Vuex - This is ideal for managing state, especially when you need to communicate between multiple components. You will need a set of methods to update the filter values in your store. Here's an example:

const store = {
  category: null,
  tag: null,
  date: null
}

const actions = {
  updateFilter({ commit }, payload) {
    commit('updateFilter', payload); // example payload structure: { filterName: 'category', filterValue: 'reviews' }
  }
}

const mutations = {
  updateFilter(state, payload) {
    state[payload.filterName] = payload.filterValue;
  }
}

export default {
  namespaced: true,
  store,
  actions,
  mutations
}

You will then need to bind these actions using @click events on your website. Additionally, you can bind the values from the store with your filters method and use watchers to execute the filtering method when the post list changes.

If you are using Vue router with history mode, you can store your filters using query parameters:

router.push({ path: 'blog', query: { category: 'reviews' }})

This will result in your URL becoming blog?category=reviews. By implementing a method to filter out the post list based on the provided filters upon component creation, you can ensure that the posts display correctly.

An additional benefit of the second option is the ability to share the filtered view with others through the URL.

Tips for effectively passing state from a parent component to a child component without losing it

Answer №1

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