Category: JavaScript

Sometimes, we want to silently update URL without triggering route change in Vue Router.

In this article, we’ll look at how to silently update URL without triggering route change in Vue Router.

How to silently update URL without triggering route change in Vue Router?

To silently update URL without triggering route change in Vue Router, we can use the history.pushState method.

For instance, we write

<script>
export default {
  //...
  methods: {
    addHashToLocation(params) {
      history.pushState(
        {},
        null,
        `${this.$route.path}#${encodeURIComponent(params)}`
      );
    },
  },
  //...
};
</script>

to call history.pushState with the URL we want to go to as the 3rd argument.

This will change the URL without trigger a route change.

Conclusion

To silently update URL without triggering route change in Vue Router, we can use the history.pushState method.

Sometimes, we want to export more than one variable in ES6.

In this article, we’ll look at how to export more than one variable in ES6.

How to export more than one variable in ES6?

To export more than one variable in ES6, we can put all the variables in the curly braces.

For instance, we write

store.js

const testObject = Parse.Object.extend("TestObject");
const post = Parse.Object.extend("Post");

export { testObject, post };

to export the testObject and post in a module.

Then we import the members from store.js with

import { testObject, post } from '../store'

Conclusion

To export more than one variable in ES6, we can put all the variables in the curly braces.

Sometimes, we want to order objects in v-for with Vue.js.

In this article, we’ll look at how to order objects in v-for with Vue.js.

How to order objects in v-for with Vue.js?

To order objects in v-for with Vue.js, we can create a computed property and then use the computed property with v-for.

For instance, we write

<template>
  <div id="app">
    ...
    <p v-for="user in orderedUsers">{{ user.name }}</p>

    ...
  </div>
</template>

<script>
export default {
  //...
  computed: {
    orderedUsers() {
      return this.users.sort((a, b) => a.name.localeCompare(b.name));
    },
  },
  //...
};

</script>

to create the orderedUsers computed property that returns the this.users array sorted by the name property value of each object.

Then we use v-for to render the objects’ name property values with v-for.

Conclusion

To order objects in v-for with Vue.js, we can create a computed property and then use the computed property with v-for.

Sometimes, we want to change body styles in Vue Router.

In this article, we’ll look at how to change body styles in Vue Router.

How to change body styles in Vue Router?

To change body styles in Vue Router, we can add a watcher for the $route object and then change the styles in the watcher.

For instance, we write

<script>
export default {
  //...
  watch: {
    $route: {
      handler(to, from) {
        const [body] = document.getElementsByTagName("body");
        if (from !== undefined) {
          body.classList.remove(`page-${from.name.toLowerCase()}`);
        }
        body.classList.add(`page-${from.name.toLowerCase()}`);
      },
      immediate: true,
      deep: true,
    },
  },
  //...
};
</script>

to add a watcher for the $route object.

We get the body element with getElementsByTagName.

Then we call body.classList.remove to remove the class if from isn’t undefined.

And then we call body.classList.add to add the class again.

We set immediate to true so the watcher runs immediately when the page loads.

And we set deep to true to run the watcher when any content in the $route object changes.

Conclusion

To change body styles in Vue Router, we can add a watcher for the $route object and then change the styles in the watcher.

Sometimes, we want to access async store data in Vue Router for usage in beforeEnter hook.

In this article, we’ll look at how to access async store data in Vue Router for usage in beforeEnter hook.

How to access async store data in Vue Router for usage in beforeEnter hook?

To access async store data in Vue Router for usage in beforeEnter hook, we can set beforeEnter to an async function.

For instance, we write

const routes = [
  //...
  {
    path: "/example",
    component: Example,
    beforeEnter: async (to, from, next) => {
      const response = await store.dispatch("initApp");
      //...
    },
  },
  //...
];

to set beforeEnter to an async function that calls store.dispatch.

We get the promise it returns and use await to get the response value.

Conclusion

To access async store data in Vue Router for usage in beforeEnter hook, we can set beforeEnter to an async function.