Show HN: I made a calculator that works over disjoint sets of intervals

I created an open-source calculator that uses interval union arithmetic, which handles division by intervals containing zero more accurately. This is useful for confident exclusion of non-empty sets of real numbers from possible values. The calculator is implemented in TypeScript and uses IEEE 754 double precision floats for accuracy. It's a simple interactive tool to try out interval union arithmetic. The underlying library is dependency-free and implements interval union arithmetic over IEEE 754 double precision floats.