to-uint8-clamped.js 459 B

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  1. 'use strict';
  2. var floor = Math.floor;
  3. // https://tc39.es/ecma262/#sec-touint8clamp
  4. module.exports = function (it) {
  5. var number = +it;
  6. // eslint-disable-next-line no-self-compare -- NaN check
  7. if (number !== number || number <= 0) return 0;
  8. if (number >= 0xFF) return 0xFF;
  9. var f = floor(number);
  10. if (f + 0.5 < number) return f + 1;
  11. if (number < f + 0.5) return f;
  12. // round-half-to-even (banker's rounding)
  13. return f % 2 === 0 ? f : f + 1;
  14. };