Category: JavaScript

Sometimes, we want to mock window.location.href with Jest and Vue.js.

In this article, we’ll look at how to mock window.location.href with Jest and Vue.js.

How to mock window.location.href with Jest and Vue.js?

To mock window.location.href with Jest and Vue.js, we can mock the window.location property with our own values.

For instance, we write

global.window = Object.create(window);
const url = "https://example.com";
Object.defineProperty(window, "location", {
  value: {
    href: url,
  },
});
expect(window.location.href).toEqual(url);

to call Object.defineProperty with window and 'location' and an object with the value.href property to set window.location.href‘s value to the url.

We make a copy of window and assign it to global.window with

global.window = Object.create(window)

Conclusion

To mock window.location.href with Jest and Vue.js, we can mock the window.location property with our own values.

Sometimes, we want to fix the unknown custom element error with Vue.js.

In this article, we’ll look at how to fix the unknown custom element error with Vue.js.

How to fix the unknown custom element error with Vue.js?

To fix the unknown custom element error with Vue.js, we need to register the components we use in our component.

For instance, we write

<template>
  <my-task></my-task>
</template>

<script>
//...

export default {
  //...
  components: {
    MyTask,
  },
  //...
};
</script>

to register the MyTask component with

components: {
  MyTask,
},

Then we can use the MyTask component with

<my-task></my-task>

Conclusion

To fix the unknown custom element error with Vue.js, we need to register the components we use in our component.

Sometimes, we want to use props in CSS with In Vue.js.

In this article, we’ll look at how to use props in CSS with In Vue.js.

How to use props in CSS with In Vue.js?

To use props in CSS with In Vue.js, we can set the style prop to an object with prop values as CSS style values.

For instance, we write

<template>
  <div :style="style" @mouseover="mouseOver()"></div>
</template>

<script>
export default {
  props: ["color"],
  computed: {
    style() {
      return { "background-color": this.hovering ? this.color : "red" };
    },
  },
  data() {
    return {
      hovering: false,
    };
  },
  methods: {
    mouseOver() {
      this.hovering = !this.hovering;
    },
  },
};
</script>

to create the style computed property to return an object with background-color set to the this.color prop value if this.hovering is true.

Otherwise, we set it to 'red'.

And then we set the style prop to style to apply the styles with

:style="style"

We register the color prop

props: ["color"]

Conclusion

To use props in CSS with In Vue.js, we can set the style prop to an object with prop values as CSS style values.

Sometimes, we want to change the port number in a Vue CLI project.

In this article, we’ll look at how to change the port number in a Vue CLI project.

How to change the port number in a Vue CLI project?

To change the port number in a Vue CLI project, we can change the port property in the object being exported in vue.config.js.

For instance, we write

vue.config.js

module.exports = {
  // ...
  devServer: {
    open: process.platform === "darwin",
    host: "0.0.0.0",
    port: 8088,
    https: false,
    hotOnly: false,
  },
  // ...
};

to change the port property to 8088 to server the Vue CLI project on port 8088.

Conclusion

To change the port number in a Vue CLI project, we can change the port property in the object being exported in vue.config.js.

Sometimes, we want to pass multiple parameters to mutation with Vuex.

In this article, we’ll look at how to pass multiple parameters to mutation with Vuex.

How to pass multiple parameters to mutation with Vuex?

To pass multiple parameters to mutation with Vuex, we can put all the values in the same object and destructure them in the mutation method.

For instance, we write

const store = new Vuex.Store({
  //...
  mutations: {
    authenticate(state, { token, expiration }) {
      localStorage.setItem("token", token);
      localStorage.setItem("expiration", expiration);
    },
  },
  //...
});

to add the authenticate mutation that takes an object with the token and expiration properties.

And then we can commit the mutation with

store.commit("authenticate", {
  token,
  expiration,
});

We call commit with the mutation name and the object with all the values we want to pass into the mutation’s 2nd parameter.

Conclusion

To pass multiple parameters to mutation with Vuex, we can put all the values in the same object and destructure them in the mutation method.