bigint-is-perfect-square
Checks if BigInt number is a perfect square
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example:
var isFullSquare = require('bigint-is-perfect-square');
var r1 = 9n;
console.log(isFullSquare(r1));//true
r1 = 35n;
console.log(isFullSquare(r1));//false
r1 = 82120471531550314555681345949499512621827274120673745141541602816614526075010755373654280259022317599142038423759320355177481886719814621305828811322920076213800348341464996337890625n
console.log(isFullSquare(r1));//true
r1 = -225n;
console.log(isFullSquare(r1));//false