Harness the power of Vue.js by implementing plugin methods in your code

Question

Harness the power of Vue.js by implementing plugin methods in your code

For my first attempt at building a SPA with Vue, I decided to re-use a few functions but encountered some issues. The error message

"this.ExperienceToLevel is not a function"

kept popping up and it left me puzzled.

Furthermore, I'm contemplating if creating a plugin is truly the optimal approach for what I'm trying to accomplish. My goal is to make certain functions global "the Vue way". However, I am adamant about not resorting to assigning them to window using

window.UserLevel = new UserLevel()

.

The content of UserLevel.js:

/*
Create Levels array
 */
let Levels = [];
for (let i = 0; i < 100; i++) {
    let xp = Math.floor(Math.pow(i, 1.3) * 100);
    Levels.push(xp);
}

/*
Create UserLevel Plugin
 */
const UserLevel = {
    install(Vue, options) {
        Vue.ExperienceToLevel = function (xp) {
            for (const [level, levelXP] of Object.entries(options.levels)) {
                if (levelXP > xp) {
                    return level-1;
                }
            }
        }

        Vue.LevelToExperience = function (level) {
            return options.levels[level];
        }

        Vue.ExperiencePercent = function (level) {
            return ((this.xp - this.LevelToExperience(this.level)) / (this.LevelToExperience(this.level + 1) - this.LevelToExperience(this.level))) * 100;
        }
    }
};

export {
    Levels,
    UserLevel
};

Attempted to import the plugin into a component as follows:

import { UserLevel, Levels } from './../../UserLevel';
Vue.use(UserLevel, { levels: Levels });

Then utilized the global methods like this: this.ExperienceToLevel(this.xp)

javascript vue.js

Answer 1

Answer №1

As outlined in the Vue documentation regarding Plugins, there are two available approaches:

You can define these functions within a mixin:

const UserLevel = {
    install(Vue, options) {
        Vue.mixin({
            methods: {
                ExperienceToLevel(xp) { ... },
                LevelToExperience(level) { ... },
                ExperiencePercent(level) { ... },
            }
        })
    }
};

Alternatively, you can attach them to Vue.prototype:

Vue.prototype.$ExperienceToLevel = function (xp) { ... }
Vue.prototype.$LevelToExperience = function (level) { ... }
Vue.prototype.$ExperiencePercent = function (level) { ... }

Personally, I prefer the first method.

Answer 2

As outlined in the Vue documentation regarding Plugins, there are two available approaches:

You can define these functions within a mixin:

const UserLevel = {
    install(Vue, options) {
        Vue.mixin({
            methods: {
                ExperienceToLevel(xp) { ... },
                LevelToExperience(level) { ... },
                ExperiencePercent(level) { ... },
            }
        })
    }
};

Alternatively, you can attach them to Vue.prototype:

Vue.prototype.$ExperienceToLevel = function (xp) { ... }
Vue.prototype.$LevelToExperience = function (level) { ... }
Vue.prototype.$ExperiencePercent = function (level) { ... }

Personally, I prefer the first method.

Harness the power of Vue.js by implementing plugin methods in your code

Answer №1

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