按样式选择元素示例代码:
This is a red paragraph.
This is a blue paragraph.
This is a green paragraph.
按ID选择元素示例代码:
This is a paragraph with id "para1".
This is a paragraph with id "para2".
This is a paragraph with id "para3".
上述代码中,通过使用querySelectorAll
方法和选择器(例如.red
、.blue
和.green
)按样式选择元素。使用getElementById
方法和ID(例如para1
、para2
和para3
)按ID选择元素。
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