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Javascript calculation

A simple HTML calculation form with code samples

It is often required to make an online form that can calculate the totals. Here is a simple HTML calculation form It is structured like an invoice form so that you can copy and adapt. Note that “simple” is meant to be taken as easy to understand. So I have avoided any temptation to make the smallest code. Also, the code uses some jQuery to do the calculation Here is a sample calculation form.

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Age calculator HTML Code for website

Suppose you have a requirement to capture the date of birth of the user and then calculate age from the date. You can do the calculation using the Date Javascript global object. Here is some sample code that does just that. function calculateAge(date) { const now = new Date(); const diff = Math.abs(now - date ); const age = Math.floor(diff / (1000 * 60 * 60 * 24 * 365)); return age } In this function, the age calculation is straightforward; it finds the difference between the dates.

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