Our calculator will only able to perform basic math operations: addition, subtraction, multiplication and division. I simplified this tutorial as best as I could, so you would survive :. So what exactly do we need to build this? But in fancier terms, these are the components we need:. Visually, a calculator is a table enclosed in a container. And as you should already know tables are made of rows and columns with cells to contain table data.
CSS3 box shadows are used to create the 3D effect and transitions are used for the smooth press effect. Basic regex is used for validations and text replacements. For every button number or operator pressed, the value is appended to an equation string displayed on the calculator screen which is later used in the JS eval function to generate the output.
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Speed Coding - HTML, CSS, JS - Calculator