Chapter 1: Introduction to Vue 3

Vue 3 is the latest iteration of the user-friendly Vue JavaScript framework, designed for building front-end applications. In this guide, we will explore the process of developing a straightforward calculator using Vue 3 and JavaScript.

Chapter 2: Setting Up Your Project

To get started with our Vue project, we will utilize the Vue CLI. First, you need to install it. You can do this using NPM with the following command:

npm install -g @vue/cli

Alternatively, if you prefer Yarn, you can run:

yarn global add @vue/cli

Once installed, create your project by executing:

vue create calculator

Select all default settings when prompted to set up your project. Additionally, we will require the Math.js library to evaluate mathematical expressions. Install it using:

npm install mathjs

Chapter 3: Building the Calculator

Now, let's dive into creating the calculator. Begin by adding an expression string at the top of your template. Next, incorporate buttons for the calculator, which will allow users to append characters to the expression being evaluated.

All buttons, except for one, should have their type set to "button" to prevent the calculate method from being executed until the "=" button is clicked. Utilize the stop propagation feature to stop the click event from bubbling up.

Within the component object, implement the calculate method to evaluate the expression inputted by the user. Utilize the @submit.prevent directive to invoke the calculate method when the form is submitted via the "=" button. The prevent modifier ensures that the default server-side submission behavior is avoided.

To evaluate the expression, call the evaluate method from Math.js and assign the result to the reactive property this.expression. In the style section, adjust the button widths to 20px, while setting the clear button to 40px to ensure the text fits comfortably within the button.

This video demonstrates how to build a calculator using Vue.js, showcasing step-by-step instructions for beginners.

Chapter 4: Conclusion

In summary, creating a simple calculator using Vue 3 and JavaScript is a straightforward task. If you found this guide helpful, consider subscribing to our YouTube channel for more engaging content!

Learn how to build a calculator in Vue.js 3 with this easy-to-follow tutorial that simplifies the process for everyone.