以下文字与答案无关
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var fn = name => console.log(name);
B:var fn = x => x + 2;
C:var fn = _=> 'one';
D:var fn = => 666;
var fn = name => console.log(name);
B:var fn = x => x + 2;
C:var fn = _=> 'one';
D:var fn = => 666;