Utilize a helper class in Vue.js component data by calling a function from the imported module

I'm attempting to execute a JavaScript function from an imported helper class within my Vue.js component. To do this, I import the helper class into my component and try using the mounted() lifecycle hook to call the function while passing a parameter to it.

Although I've explored some potential solutions, none of them have provided the desired outcome. Here are the sources I referenced:

Vue.js: Import class with function and call it in child component

https://forum.vuejs.org/t/how-to-use-helper-functions-for-imported-modules-in-vuejs-vue-template/6266

This is what I have attempted so far. Any suggestions or ideas would be greatly appreciated.

Here is my helper class, myHelper.js:

export default myHelper {
    myHelperFunction(param) {
        return param;
    }
}

And here is my Vue component, MyComponent.vue:

<template>
  <v-text-field :rules="[myRule]"></v-text-field>
</template>

<script>
import myHelper from './myHelper.js';

export default {
  name: 'MyComponent',
  data() {
    return {
      myCls: new myHelper(),
      myRule: this.callHelperFunction,
    };
  },
  components: {
    myHelper,
  },
  mounted() {
    this.myCls.myHelperFunction();
  },
  methods: {
    callHelperFunction(param) {
      this.myCls.myHelperFunction(param);
    }
  },
};
</script>

Answer №1

It's important to note that simply exporting the class as an object won't work. To properly export a class, follow these steps:

// Make sure to use the class keyword
export default class HelperClass {
    helperFunction(parameter) {
        return parameter;
    }
}

Additionally, there is no need for:

components: {
    myHelper,
},

The rest of your code can remain unchanged.

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