webhook-action/node_modules/es-abstract/2016/ToUint8Clamp.js

20 lines
522 B
JavaScript

'use strict';
var ToNumber = require('./ToNumber');
var floor = require('./floor');
var $isNaN = require('../helpers/isNaN');
// https://ecma-international.org/ecma-262/6.0/#sec-touint8clamp
module.exports = function ToUint8Clamp(argument) {
var number = ToNumber(argument);
if ($isNaN(number) || number <= 0) { return 0; }
if (number >= 0xFF) { return 0xFF; }
var f = floor(argument);
if (f + 0.5 < number) { return f + 1; }
if (number < f + 0.5) { return f; }
if (f % 2 !== 0) { return f + 1; }
return f;
};