调试器还允许开发人员变更并检查元素的值(图11)。

The debugger also allows developers to change and inspect values of elements (Figure 11).

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在检查元素时，将会看到Firebug窗口内的元素嵌套，如图5所示。

While inspecting elements, you will see the element nesting in the Firebug window, as shown in Figure 5.

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如果Boolean为True，解析器检查元素，该元素是的一个子元素。

If the Boolean is True, the parser is examining a element that is a child of.

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If there are less than two elements there I just check one or both of those to see if I'm looking for the right thing.

列表里是否剩余超过两个元素？,是否剩余不足两个元素,这里面我就挑一两项来检查下是否运行正常。

麻省理工公开课 - 计算机科学及编程导论课程节选