js中函数定义和调用顺序问题？

Question

请问函数必须在head标签中定义么？对于定义和调用顺序要求严格吗？是否可以调用在前定义在后？

数据分析师 · Answer

Problems with function definition and calling order in js? -PHP Chinese website Q&A-Problems with function definition and calling order in js? -PHP Chinese website Q&A

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迷茫 · Answer

函数不是必须在head标签中定义，js常用的调用方式有三种，行内，内嵌，和外链，这三种都可以定义函数，浏览器是从上到下执行，js是要向发挥好，就要等其他东西加载完，所以一般定义在body底部，

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