What does the use of square brackets signify in Vuex mutations?

Question

What does the use of square brackets signify in Vuex mutations?

I'm curious about the use of mutation values within brackets in Vuex.

What does the code "" represent?

export const SOME_MUTATION = 'SOME_MUTATION'

Is this just a constant name for a function? If so, why is it enclosed in brackets "[]"?

Furthermore, when using it in the computed or method property, what is the reason for passing ["SOME_ACTION"] instead of "SOME_ACTION"?

...mapActions(["SOME_ACTION"]),

Example Code

export const SOME_MUTATION = 'SOME_MUTATION'

import Vuex from 'vuex'
import { SOME_MUTATION } from './mutation-types'

const store = new Vuex.Store({
  state: { ... },
  mutations: {
    [SOME_MUTATION] (state) {
    }
  }
})

javascript vue.js ecmascript-6 vuex

Answer 1

Answer №1

A computed property name, as explained in the Mozilla Developer Network, is a feature introduced in ECMAScript 2015 and not specific to Vuex. Prior to ES2015, dynamically naming object properties was not directly supported.

In older versions of JavaScript, developers would have to resort to conditional logic to achieve similar results:

const obj = {};
const result = Math.random() < 0.5;

if (result)
  obj.data = result;
else
  obj.error = result;
  
console.log(obj);

With the introduction of computed property names in ES2015, the syntax has become more concise and flexible:

const result = Math.random() < 0.5;
const SOME_PROPERTY = result ? 'data' : 'error';

const obj = {
  [SOME_PROPERTY]: result
}

console.log(obj);

Although this example may seem trivial, the use of computed properties can lead to cleaner and more readable code. For further information on its applications, additional resources are available online.

Answer 2

A computed property name, as explained in the Mozilla Developer Network, is a feature introduced in ECMAScript 2015 and not specific to Vuex. Prior to ES2015, dynamically naming object properties was not directly supported.

In older versions of JavaScript, developers would have to resort to conditional logic to achieve similar results:

const obj = {};
const result = Math.random() < 0.5;

if (result)
  obj.data = result;
else
  obj.error = result;
  
console.log(obj);

With the introduction of computed property names in ES2015, the syntax has become more concise and flexible:

const result = Math.random() < 0.5;
const SOME_PROPERTY = result ? 'data' : 'error';

const obj = {
  [SOME_PROPERTY]: result
}

console.log(obj);

Although this example may seem trivial, the use of computed properties can lead to cleaner and more readable code. For further information on its applications, additional resources are available online.

What does the use of square brackets signify in Vuex mutations?

Answer №1

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