This calculator project represents a significant milestone in my journey to mastering JavaScript. In this project, I have built a fully functional on-screen calculator using JavaScript, HTML, and CSS. The calculator performs basic arithmetic operations, provides a user-friendly interface, and includes additional features such as decimal input and keyboard support. You can see the calculator here
The calculator project combines a range of fundamental web development skills and concepts. Here's a breakdown of the key aspects of this project:
The calculator supports the following basic math operations:
- Addition
- Subtraction
- Multiplication
- Division These operations are implemented as JavaScript functions and are tested in the browser's console.
The calculator has a user-friendly interface with buttons for each digit (0-9), operators (+, -, *, /), an equals (=) key, a clear button (C), a decimal (.) button, and a backspace button (⌫).
The calculator processes arithmetic operations in the following manner:
User inputs a number, followed by an operator, another number, and so on. When the equals (=) button is pressed, the calculator evaluates the expression based on the operator precedence and displays the result. Display The calculator has a display screen that shows the entered numbers, the selected operator, and the result of the calculation. The display is updated dynamically as the user interacts with the calculator.
The calculator includes error handling features:
Division by zero: Displays an error message and prevents the calculator from crashing if the user attempts to divide by zero. Preventing multiple decimals: Disables the decimal button if there's already a decimal point in the display. Keyboard Support Users can operate the calculator using the keyboard, providing a convenient alternative to clicking buttons. Keyboard support is implemented with attention to detail, ensuring a seamless user experience.
During the development of this calculator project, I have acquired valuable knowledge and skills in web development, including:
- JavaScript Fundamentals: Reinforced my understanding of JavaScript fundamentals, including functions, variables, and event handling.
- DOM Manipulation: Gained hands-on experience in manipulating the Document Object Model (DOM) to create interactive web applications.
- Event Handling: Learned to handle user interactions, such as mouse clicks and keyboard inputs, using JavaScript event listeners.
- Error Handling: Implemented error handling techniques to ensure the calculator functions correctly and gracefully handles unexpected user inputs.
- CSS Styling: Enhanced my CSS skills by styling the calculator interface, making it visually appealing and user-friendly.
- Keyboard Events: Learned to handle keyboard events, including key presses and preventing default behavior for specific keys.
You can access and use the calculator project through the following link: Calculator Web App
Feel free to perform basic calculations, explore the user interface, and test out the additional features like decimal input and keyboard support. This project represents a culmination of my JavaScript skills and showcases my ability to create interactive web applications.