Connecting VueJS with External Javascript File to Trigger Functions from Template

Imagine you're working on a VueJS project and have a HelloWorld.js file structured as follows:

export default {
addNumbers: function (a,b) {
    return a+b;
    }
}

You then utilize this in your HelloWorld.vue file like so:

<template>
  <div>
    <h1>{{addNumbers(1,2)}}</h1>
  </div>
</template>

<script>
import helloWorldJS from './HelloWorld.js'

export default {
  name: 'HelloWorld',
  methods: {
    addNumbers: function(a,b) {
      return helloWorldJS.addNumbers(a,b);
    }
  }
}
</script>

The struggle arises from having to replicate the addNumbers function within the methods section of the HelloWorld component.

Is there an efficient method to make the external addNumbers function accessible from the template section?

Answer №1

If you want to export a function as a constant, you can do it like this:

export const multiplyNumbers = (x,y) => x*y;

Then in your Vue file, you can import and use it as follows:

import { multiplyNumbers }  from './Calculator.js'

export default {
  name: 'Calculator',
  methods: {
    multiplyNumbers // This is equivalent to multiplyNumbers: multiplyNumbers
  }
}

Answer №2

In the vue template, you cannot directly import a method and use it. Functions must be defined in the methods object section. However, if you want to make a method global, you can utilize plugins as shown below.

import Vue from "vue";
import App from "./App.vue";

Vue.config.productionTip = false;

new Vue({
   render: (h) => h(App)
}).$mount("#app");

const MyPlugin = {
   install(Vue, options) {
      Vue.prototype.addNumbers = (a, b) => {
        return a + b;
      };
   }
};
Vue.use(MyPlugin);

After using the plugin, you can directly call the function in the template like this:

<template>
  <div>
    <h1>{{addNumbers(1,2)}}</h1>
  </div>
</template>

<script>
export default {
   name: 'HelloWorld',
   methods: {
   }
}
</script>

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