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var scope = 'global'
function checkScope() {
 var scope = 'local';
 function f() {
    return scope;
 }
 return f;
}
checkScope()();

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JavaScript 采用的是词法作用域,函数的作用域基于函数创建的位置。


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
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