viet-anh.n 89159fb927 [TSC-9] Add numeric input validator module

- Create validator.js with validateNumericInput() function
- Validates numeric strings; allows digits, leading minus, single decimal point
- Rejects invalid characters, multiple decimals, misplaced minus signs
- Returns { isValid, value, sanitized } object
- Link validator.js in index.html <head>
- Update CLAUDE.md project structure to include validator.js

2026-07-08 07:58:12 +00:00

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Simple Calculator

Greenfield project. Implementation is driven by the Vexa AI-SDLC pipeline (Jira project TSC).

Project Structure

/
├── index.html  # Calculator UI (semantic HTML5)
├── styles.css  # Responsive CSS layout and styling
├── validator.js  # Numeric input validator (validateNumericInput)
├── README.md   # Project overview
└── CLAUDE.md   # This file

Build Commands

No build system has been configured yet. Update this section once a language/framework is chosen and dependencies are added.

Test Commands

No test suite has been configured yet. Update this section once testing infrastructure is in place.

Development Commands

No dev server or REPL is configured yet. Update this section once the implementation begins.

Architecture Notes

Domain: Simple Calculator — arithmetic operations (add, subtract, multiply, divide at minimum).
Stack: Plain HTML/CSS/JS — no framework or build step.
index.html contains the full UI structure: operand inputs, operation buttons, calculate/clear buttons, result <output>, and an error <p role="alert">.

Code Style

No linter or formatter has been configured yet. Update this section once tooling is set up.

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