We then extract the name of the changed property, the new value, and pass that into a function that sets the value through reflection (see listing 7).

然后提取已变更的属性的名称和新的值，并将它们传递给一个函数，该函数通过反射对值进行设置(见清单7)。

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To access the preventDefault function, you must pass the handler event through as a parameter and use it to access the function.

要访问preventdefault函数，您必须传递处理函数(即使作为一个参数)或者使用它访问该函数。

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In that case, a better solution is to pass setMeta() a two-dimensional array with name-value pairs and have the function loop through it -- performing all the activities simultaneously.

在这种情况下，更佳的解决方案是将带有名称-值对的两维数组传递给 setMeta() ，并且让函数循环执行该数组 — 同时执行所有操作。

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