vue hello world项目
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var $ = require('../internals/export');
var isIntegralNumber = require('../internals/is-integral-number');
var abs = Math.abs;
// `Number.isSafeInteger` method
// https://tc39.es/ecma262/#sec-number.issafeinteger
$({ target: 'Number', stat: true }, {
isSafeInteger: function isSafeInteger(number) {
return isIntegralNumber(number) && abs(number) <= 0x1FFFFFFFFFFFFF;
}
});