Building a Free, Open-Source Dividend Calculator Suite

Описание и применение

Автор создал бесплатный набор калькуляторов дивидендов, работающий полностью в браузере без регистрации. Ядро системы — это открытая библиотека на TypeScript с чистыми функциями, что обеспечивает прозрачность и отсутствие серверной обработки данных.

Задача

Existing free dividend calculators typically require email signups, trials, or hide their logic behind paywalls, creating friction and lack of transparency for users.

Результат

A suite of focused dividend calculators (yield, DRIP, monthly income, ETF specific) that runs entirely in the browser with no signup, backed by an open-source, tested TypeScript library.

Рабочий процесс

• Identify standard financial formulas (yield, payout ratio, DRIP) as commodity knowledge.
• Create a zero-dependency TypeScript library (dividend-math) containing pure functions for each calculation.
• Implement strict input validation to fail loudly on bad inputs (e.g., NaN) rather than returning plausible nonsense.
• Write unit tests to cover edge cases like zero price or zero earnings.
• Build a static site that imports the library and performs all computations in the browser.
• Publish the library to npm and the source code to GitHub under an MIT license.
• Deploy the static site to ensure no backend data collection is required.

Доказательства

Every 'free' dividend calculator I tried wanted an email, a signup, or a trial.

Источник

I pulled every formula into one zero-dependency TypeScript library: dividend-math.

Источник

It's a statically-generated site — all computation happens in your browser, nothing is sent anywhere.

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