Build a Tip Calculator App Using Vue 3 and JavaScript
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Creating the Project
To develop a tip calculator application using Vue 3, we first need to set up our project. We can do this easily with the Vue CLI. To install it, you can execute the following command using npm:
npm install -g @vue/cli
Alternatively, if you prefer Yarn, use:
yarn global add @vue/cli
Once the Vue CLI is installed, initiate your project by running:
vue create tip-calculator
Opt for the default settings to get started.
Building the Tip Calculator Application
To construct our tip calculator app, we will set up a simple template as follows:
<template>
<form @submit.prevent="calculate">
<div>
<label>Bill Amount</label>
<input v-model.number="billAmount" />
</div>
<div>
<label>Percentage Tip</label>
<input v-model.number="percentageTip" />
</div>
<button type="submit">Calculate</button>
</form>
<p>Tip Amount: {{ tipAmount.toFixed(2) }}</p>
<p>Total: {{ total.toFixed(2) }}</p>
</template>
In this section, we create a form where users can input the bill amount and the desired tip percentage. We utilize the @submit.prevent directive to handle form submission on the client side, preventing the default server-side action.
The v-model directive allows us to bind the input values to reactive properties within our Vue component. By using the .number modifier, we ensure that the inputs are automatically parsed into numbers.
Next, we will define the script logic for our app:
<script>
export default {
name: "App",
data() {
return {
billAmount: 0,
percentageTip: 0,
tipAmount: 0,
total: 0,
};
},
computed: {
formValid() {
const { billAmount, percentageTip } = this;
return +billAmount > 0 && +percentageTip > 0;
},
},
methods: {
calculate() {
const { billAmount, percentageTip } = this;
this.tipAmount = billAmount * (percentageTip / 100);
this.total = billAmount * (1 + percentageTip / 100);
},
},
};
</script>
In this script section, we establish our reactive properties and their initial values. The formValid computed property checks if the inputs are greater than zero.
When the user clicks the "Calculate" button, the calculate method is triggered, computing both the tip amount and the total bill.
The first video illustrates how to create a tip calculator using JavaScript and provides further insights into working with Vue.
The second video demonstrates how to build a calculator app with Vue JS, enhancing your understanding of the framework.
Conclusion
In conclusion, we've successfully built a tip calculator application using Vue 3 and JavaScript. This project not only illustrates the core principles of Vue but also enhances your skills in JavaScript application development.
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