What is the process for importing an external function into a Vue component?

Question

What is the process for importing an external function into a Vue component?

Having just started learning javascript and vue.js, I encountered an issue while attempting to add a new function to an existing program.

I decided to store my new function (along with others) in a separate file:

export const MyFunctions = {
MyFunction: function(param) {
    // Performing actions
}
}

After that, I imported the file into the component file and tried to call my function :

<script>
    import {MyFunctions} from "@/components/MyFunctions.js";
    export default {
        name:"Miniature",
        computed: {
            useMyFunction() {
                MyFunction("Please perform some actions!");
            }
        }
    }
</script>

However, when I use the component, I receive an error message

[Vue warn]: Property or method "MyFunction" is not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property. See: https://v2.vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.

Despite reading several resources, I can't seem to figure out why it's not working. Any help would be greatly appreciated!

javascript vue.js

Answer 1

Answer №1

To utilize the MyFunction, which is exported as part of an object, you must access it using dot notation like so:

MyFunctions.MyFunction("Please do some stuff !")

An interactive example demonstrating this concept can be found here: https://codesandbox.io/s/62l1j19rvw

MyFunctions.js

export const MyFunctions = {
  MyFunction: function(param) {
    alert(param);
  }
};

Component

<template>
  <div class="hello">
   {{msg}}
   <button @click="handleClick">Click me</button>
  </div>
</template>

<script>
import {MyFunctions} from "../MyFunctions.js";
export default {
  name: "HelloWorld",
  data() {
    return {
      msg: "Welcome to Your Vue.js App"
    };
  },
  methods:{
    handleClick: function(){
      MyFunctions.MyFunction("Please do some stuff !");
    }
  }
};
</script>

Answer 2

To utilize the MyFunction, which is exported as part of an object, you must access it using dot notation like so:

MyFunctions.MyFunction("Please do some stuff !")

An interactive example demonstrating this concept can be found here: https://codesandbox.io/s/62l1j19rvw

MyFunctions.js

export const MyFunctions = {
  MyFunction: function(param) {
    alert(param);
  }
};

Component

<template>
  <div class="hello">
   {{msg}}
   <button @click="handleClick">Click me</button>
  </div>
</template>

<script>
import {MyFunctions} from "../MyFunctions.js";
export default {
  name: "HelloWorld",
  data() {
    return {
      msg: "Welcome to Your Vue.js App"
    };
  },
  methods:{
    handleClick: function(){
      MyFunctions.MyFunction("Please do some stuff !");
    }
  }
};
</script>

Answer 3

Answer №2

If you want to integrate your javascript files into .vue files, you can simply do so by enclosing them within <script> tags. Remember that Vue.js is essentially javascript, so when troubleshooting, make sure to double-check for any syntax errors. It seems like there may be some confusion with the import and export statements, which can initially seem daunting.

Refer to MDN's Documentation, particularly the section on named exports:

In the module, we could use the following

// module "my-module.js"
function cube(x) {
  return x * x * x;
}
const foo = Math.PI + Math.SQRT2;
var graph = { /* nice big object */ }
export { cube, foo, graph };

This way, in another script, we could have:

import { cube, foo, graph } from 'my-module';
// Utilize your functions efficiently

Answer 4

If you want to integrate your javascript files into .vue files, you can simply do so by enclosing them within <script> tags. Remember that Vue.js is essentially javascript, so when troubleshooting, make sure to double-check for any syntax errors. It seems like there may be some confusion with the import and export statements, which can initially seem daunting.

Refer to MDN's Documentation, particularly the section on named exports:

In the module, we could use the following

// module "my-module.js"
function cube(x) {
  return x * x * x;
}
const foo = Math.PI + Math.SQRT2;
var graph = { /* nice big object */ }
export { cube, foo, graph };

This way, in another script, we could have:

import { cube, foo, graph } from 'my-module';
// Utilize your functions efficiently

Answer 5

Answer №3

When exporting, you are essentially exporting an object. To access a specific field or method within this object, you should use the function in the following manner:

MyFunctions.MyFunction("Please perform some actions !");

Answer 6

When exporting, you are essentially exporting an object. To access a specific field or method within this object, you should use the function in the following manner:

MyFunctions.MyFunction("Please perform some actions !");

What is the process for importing an external function into a Vue component?

Answer №1

Answer №2

Answer №3

Similar questions

Neglecting a light source in the Three.js framework

In AngularJS, be sure to remove any previous growls before displaying a new one

When I send data using axios, I receive the response in the config object instead of the data

Employing passport-steam alongside sails-generate-auth

Error in Typescript: The property 'children' is not included in the type but is necessary in the 'CommonProps' type definition

Importing data from a CSV file into an HTML table through JavaScript

Incorporate a Javascript session into MVC 4 Razor for enhanced functionality

`Count the number of rows needed to accommodate text line breaks within a div element`

Encountering issues with $.AJAX post in JavaScript, while successful in Advanced Rest Client

Convert the jQuery functions click(), hide(), and fadeIn() into their equivalent native JavaScript functionalities

AngularJS allows you to toggle the visibility of a div at set intervals, creating

Ways to conceal a div element when the JSON data does not contain a value

The WebView fails to show up upon triggering the onPress() event

Changing the Style of a CSS Module Using JavaScript

Issue with Laravel Echo not responding to pusher notifications

Exploring the capabilities of AngularJS and Spring Boot in web development

Having trouble with installing Angular JS on my computer

Encountered an error when attempting to use the 'removeChild' function on a node that is not a child of the specified node. This issue arose while interacting with an input box

Execute JavaScript function after the window has finished loading, regardless of any asynchronous downloads

Typescript does not produce unused members