This is a simple web calculator I made as part of a tiny school project that can perform basic arithmetic operations and plot functions with HTML, CSS, Javascript & Chart.js.
You can try the calculator here.
- Basic operations:
+,-,*,/ - Decimal point:
. - Percentage calculation:
% - Square root:
√ - Clear and backspace:
C,⟵ - Opposite sign with the
okey - Chain operations on the result
- Keyboard support (numbers, operators...)
- Error handling (division by zero, wrong domain...)
- Function input
- Expression parsing & sanitization
- Feedback on expression syntax
- Plotting of the function
- Transitions between plots
You can switch between light and dark mode with a nice transition by clicking the icon in the top right corner.
You can use the calculator by clicking the buttons with your mouse or by using your keyboard. The calculator supports the following keyboard shortcuts:
- Numbers:
0-9 - Operators:
+,-,*,/,=,o(opposite sign) - Decimal point:
. - Delete:
Backspace - Clear:
Escape
You can input a function in the input field and it will be plotted on the graph.
The calculator supports the following syntax:
- constants:
E,PI - any amout of
xvariables - any number (integer or decimal)
- any amount of pairs of parentheses
- basic arithmetic operations:
+,-,*,/ - usual functions:
abs,ceil,cos,exp,floor,log,max,min,pow,round,sign,sin,sqrt,tan
- Prevent the display from overflowing
- Plot functions in a worker to avoid freezing the UI
- Make the precision of the graph adjustable by the user
- (hard) Find indefinite points to avoid trying to trace them
This project is licensed under the MIT License.