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I want a class for representing and manipulating a 128-bit decimal data type, a quadruple-precision floating point. I found double.js, but it supports only 106 accurate bits (double-double). I'm looking for something like .NET's Decimal data type or something following Wikipedia.

I also need the class to have a method that returns its composing bytes, like toBytes(), which returns an array of bytes (16 bytes). Also tell me in which endianness they're returned.

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You can try Syncfusion Numeric TextBox component https://www.syncfusion.com/javascript-ui-controls/js-numeric-textbox

Demo: https://ej2.syncfusion.com/demos/#/bootstrap5/numerictextbox/default.htm

Syncfusion offers a free community license also. https://www.syncfusion.com/products/communitylicense

Note: I work for Syncfusion

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  • Interesting, but my purpose was to build a compiler, not user interface.
    – Hydroper
    Aug 17, 2022 at 14:35

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