HRElement 构造函数
实现
factory HRElement() => JS<HRElement>(
'returns:HRElement;creates:HRElement;new:true',
'#.createElement(#)',
document,
"hr");
factory HRElement() => JS<HRElement>(
'returns:HRElement;creates:HRElement;new:true',
'#.createElement(#)',
document,
"hr");