How can I get query parameters from a URL in Vue.js?

According to the docs of route object, you have access to a $route object from your components, which exposes what you need. In this case

//from your component
console.log(this.$route.query.test) // outputs 'yay'

Without vue-route, split the URL

var vm = new Vue({
  ....
  created() {
    let uri = window.location.href.split('?');
    if(uri.length == 2) {
      let vars = uri[1].split('&');
      let getVars = {};
      let tmp = '';
      vars.forEach(function(v) {
        tmp = v.split('=');
        if(tmp.length == 2)
          getVars[tmp[0]] = tmp[1];
      });
      console.log(getVars);
      // do 
    }
  },
  updated() {
  },
....

Another solution https://developer.mozilla.org/en-US/docs/Web/API/HTMLHyperlinkElementUtils/search:

var vm = new Vue({
  ....
  created() {
    let uri = window.location.search.substring(1); 
    let params = new URLSearchParams(uri);
    console.log(params.get("var_name"));
  },
  updated() {
  },
....

Try this code

var vm = new Vue({
  created() {
    let urlParams = new URLSearchParams(window.location.search);
    console.log(urlParams.has('yourParam')); // true
    console.log(urlParams.get('yourParam')); // "MyParam"
  },
});

More detailed answer to help the newbies of VueJS:

First define your router object, select the mode you seem fit. You can declare your routes inside the routes list.

Next you would want your main app to know router exists, so declare it inside the main app declaration.

Lastly the $route instance holds all the information about the current route. The code will console log just the parameter passed in the url. (*Mounted is similar to document.ready, i.e. it's called as soon as the app is ready)

And the code itself:

<script src="https://unpkg.com/vue-router"></script>
var router = new VueRouter({
    mode: 'history',
    routes: []
});
var vm =  new Vue({
    router,
    el: '#app',
    mounted: function() {
        q = this.$route.query.q
        console.log(q)
    },
});

Another way (assuming you are using vue-router), is to map the query param to a prop in your router. Then you can treat it like any other prop in your component code. For example, add this route;

{ 
  path: '/mypage', 
  name: 'mypage', 
  component: MyPage, 
  props: (route) => ({ foo: route.query.foo }),  
}

Then in your component you can add the prop as normal;

props: {
  foo: {
    type: String,
    default: null,
  }
},

Then it will be available as this.foo and you can do anything you want with it (like set a watcher, etc.)

As of this date, the correct way according to the dynamic routing docs is:

this.$route.params.yourProperty

instead of

this.$route.query.yourProperty

Vue 3 Composition API

(as far as now 2021, vue-router 4)

import {useRoute} from "vue-router";

//can use only in setup()
useRoute().query.test

or

//somewhere in your src files
import router from "~/router";

//can use everywhere 
router.currentRoute.value.query.test  

or

import {useRouter} from "vue-router";

//can use only in setup()
useRouter().currentRoute.value.query.test

If your url looks something like this:

somesite.com/something/123

Where '123' is a parameter named 'id' (url like /something/:id), try with:

this.$route.params.id

You can use vue-router.I have an example below:

url: www.example.com?name=john&lastName=doe

new Vue({
  el: "#app",
  data: {
    name: '',
    lastName: '',
  },
  beforeRouteEnter(to, from, next) {
    if(Object.keys(to.query).length !== 0) { //if the url has query (?query)
      next(vm => {
        vm.name = to.query.name;
        vm.lastName = to.query.lastName;
      });
    }
    next();
  }
})

Note: In beforeRouteEnter function we cannot access the component's properties like: this.propertyName.That's why i have pass the vm to next function.It is the recommented way to access the vue instance.Actually the vm it stands for vue instance

Here is how to do it if you are using vue-router with vue3 composition api

import { useRoute } from 'vue-router'

export default {
  setup() {
    const route = useRoute()
    console.log(route.query)
  }
}

Example url: http://localhost:9528/#/course/outline/1439990638887137282

Below codes output: 1439990638887137282

this.courseId = this.$route.params.id
console.log('courseId', this.courseId)

one thing to keep in mind if you are using Hash mode then don't use this.$route.params.name only use url search param

You can get By Using this function.

console.log(this.$route.query.test)