Math.floor ((Math.random () * arr.length)) do the specific DOM operations yourself
you need to use the random method of the built-in object Math in js
var num = Math.floor(Math.random() * 10)Math.random () * 10, and using floor () to round down, you can randomly get the 10 numbers of 0,9, that is, the subscript of these p elements in your diagram. Then you can get the corresponding p element according to the subscript and then manipulate the DOM.
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as shown in figure I really can t find it. Ask for help ...
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<a href="xx">< a> ...
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