Pure JavaScript Calculator Code ES6 Learn JavaScript

Build a calculator from scratch using only javascript, manipulating the dom to build and control the interface. Learn through applying logic to perform calculations and updating the page dynamically.

Set up the basic structure for a pure JavaScript calculator, creating an index page, linking app.js, and using Brackets with live preview and developer tools for debugging.

Use the DOMContentLoaded event on the window to ensure the document is loaded before manipulating DOM elements, and log that the page is ready to the console.

Define calculator values and arrays for digits and operations, update the document title dynamically with JavaScript, and prepare global options and DOM-ready setup for the calculator.

Create a dynamic calculator interface by building a main container, an output screen, and a keys area with the document object model and styling.

Dynamically build calculator keys from an ops array, use for each to create buttons, console log each value, and attach click handlers that update the output for later lessons.

Apply logic and functionality to the calculator to output content. Capture the event target key pressed, update the output input tag, and prepare for clear and evaluate steps.

Add an equal sign and clear button to the calculator object, implement evaluate using eval, and handle output styling and basic error cases to enable valid calculations.

Fix decimal handling in a pure JavaScript calculator by adding switches for decimal and evaluation, preventing extra decimals and signaling errors with a red border, using includes to verify values.

Guard against invalid input and decimal issues, use the C output function to reset colors and signal errors, and review debugging with console logs and dynamic buttons.

Fixes a bug in the javascript calculator by using the includes method to detect a decimal point and enable a dc switch, preventing multiple decimal places.