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core-js

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// 20.1.2.5 Number.isSafeInteger(number) var $def = require('./$.def') , isInteger = require('./$.is-integer') , abs = Math.abs; $def($def.S, 'Number', { isSafeInteger: function isSafeInteger(number){ return isInteger(number) && abs(number) <= 0x1fffffffffffff; } });