Encountering a TypeScript error while calling a Vue lifecycle hook method

Struggling to call a method in a Vue root component from a lifecycle method in typescript? See below for a simple example that showcases this issue:

import Vue from "vue";

class Game {
    a: number;
    b: number;
    constructor() {
        this.a = 3;
        this.b = 4;
    }
}

new Vue({
    el: "#calculator",
    data: {
        game: null
    },
    methods: {
        // bound to a button
        reset: function() {
            this.game = new Game();
        },
        // bound to a button
        add: function() {
            this.game.a += 1;
        }
    },
    beforeCreate() {
        this.reset();
    }
});

Encountering the following typescript compilation error:

src/test.ts:28:8 - error TS2339: Property 'reset' does not exist on type 'Vue'.

28 this.reset();

It seems that typescript only recognizes properties defined in data as part of this, overlooking those defined in methods. Any suggestions on how to resolve this issue?

Keep in mind, this would work perfectly in javascript

Answer №1

Even if you have already found the solution on your own, it's worth mentioning:

When working with TypeScript, there is no need to declare methods within the "methods" object. You can simply define them directly inside the class.

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