Exploring the possibilities for dynamic functionality in Vue

Question

Exploring the possibilities for dynamic functionality in Vue

Hey there! I have a method that adjusts the state of Vuex by either adding or subtracting from it. The main purpose of this method is to manipulate the state in Vuex.

setStep(state, type) {
    state.currentStep++;
}

However, I need to be able to pass the -- or ++ dynamically to it. How can I make this happen?

I attempted the following:

setStep(state, type = ++ or --) {
    state.currentStep[type];
}

Unfortunately, I did not achieve the desired result with this approach. Do you have any suggestions on how I can accomplish this dynamic adjustment?

javascript vue.js

Answer 1

Answer №1

Instead of passing an operation, pass a boolean to the function and then use either an if statement

setStep(state, increment) {
    if (increment) {
        state.currentStep++;
    } else {
        state.currentStep--;
    }
}

or a ternary operator

setStep(state, increment) {
    increment ? state.currentStep++ : state.currentStep--;
}

It's worth noting that this approach may not be standard in Vuex. Mutations should ideally have only one side effect. Consider having separate mutations for incrementing and decrementing.

You can then combine these mutations by dispatching them through a method in your Vuex store, similar to the example above.

Another option is committing the step amount directly:

setStep(state, stepAmount) {
    state.currentStep += stepAmount
}

If the step amount is negative, it will decrement. If positive, it will increment.

Committing would look like this:

commit('setStep', -1);
commit('setStep', 5);

Answer 2

Instead of passing an operation, pass a boolean to the function and then use either an if statement

setStep(state, increment) {
    if (increment) {
        state.currentStep++;
    } else {
        state.currentStep--;
    }
}

or a ternary operator

setStep(state, increment) {
    increment ? state.currentStep++ : state.currentStep--;
}

It's worth noting that this approach may not be standard in Vuex. Mutations should ideally have only one side effect. Consider having separate mutations for incrementing and decrementing.

You can then combine these mutations by dispatching them through a method in your Vuex store, similar to the example above.

Another option is committing the step amount directly:

setStep(state, stepAmount) {
    state.currentStep += stepAmount
}

If the step amount is negative, it will decrement. If positive, it will increment.

Committing would look like this:

commit('setStep', -1);
commit('setStep', 5);

Answer 3

Answer №2

If you're looking to increase or decrease a step value in your Vue app, make sure to define two functions called increment and decrement. You can then choose which function to call based on your specific needs.

const app = new Vue({
  el: "#app",
  data() {
    return {
      step: 0
    }
  },
  methods: {
    updateStep(incrementor) {
      this.step += incrementor;
    }
  }
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
  <button @click="updateStep(-1)">--</button>
  <span>{{step}}</span>
  <button @click="updateStep(1)">++</button>
</div>

Answer 4

If you're looking to increase or decrease a step value in your Vue app, make sure to define two functions called increment and decrement. You can then choose which function to call based on your specific needs.

const app = new Vue({
  el: "#app",
  data() {
    return {
      step: 0
    }
  },
  methods: {
    updateStep(incrementor) {
      this.step += incrementor;
    }
  }
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
  <button @click="updateStep(-1)">--</button>
  <span>{{step}}</span>
  <button @click="updateStep(1)">++</button>
</div>

Exploring the possibilities for dynamic functionality in Vue

Answer №1

Answer №2

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