Calculates present value based on term, monthly payment, and rate

Calculates the present value of future cash flows with a margin of safety.

Computing the internal rate of return and net present value of a series of cash flows.

HMRC-compliant Net Present Value (NPV) engine for UK property lease duty calculations (SDLT, LBTT, LTT).

Financial calculations such as Net Present Value, Present Value, Future Value

Underlying schema language parsed from arktype syntax.

A library to have a generic typescript definition for object presence.

Design tokens are the single source of truth to name and store design decisions.

Rich matchers inspired by Hamcrest. Useful for generating helpful assertion failure messages in tests.

Transforms css values and at-rule params into the tree

Match a Unicode property or property alias to its canonical property name per the algorithm used for RegExp Unicode property escapes in ECMAScript.

Reading environment options.

Compute future value of regular contributions at compound rate (FV = PMT × [(1+r)^n − 1] / r), plus present value, time-to-target, and per-d

this library helps us to create proxy objects for fetch, XHR and beacons for proper request tracking.

Use property paths like 'a.b.c' to get a nested value from an object. Even works when keys have dots in them (no other dot-prop library we tested does this, or does it correctly).

Set nested properties on an object using dot notation.

Detects what package manager was used for installation

Define a lazily evaluated property on an object

Compare, format, diff and serialize any JavaScript value

Simple key-value storage with support for multiple backends