Select option in HTML sets selected = & quot; selected & quot; invalid solution, optionselected

Select option in HTML sets selected = "selected" to an invalid solution. optionselected

Today, I encountered a strange problem. I had a select control when I wrote HTML. The selected = "selected" by setting option is invalid, but it is acceptable in other browsers. I asked Google's great god, addAutocomplete = "off", for example:

<Select autocomplete = "off">

<Option> Yes </option>

<Option selected = "selected"> NO </option>


</Select>




This is OK! In the future, we need to develop a good habit. It is safe to add autocomplete = "off" to each select tag.


Question about setting the selected attribute in the select drop-down box

Write all the options in <option> to the database and then read them directly. The last statement can be used to determine whether selected is added.
 
<Select> when selected = "selected" is set, which of the following is helpful? Khan is in a rush.

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