Native JavaScript enables dynamic provincial/county-level linkage drop-down box menu instance code, javascript drop-down box
Like when you select an address for shopping, you can dynamically load the city list by selecting a province, and dynamically load the county list by selecting a city. This allows you to achieve three levels of association between provinces, cities, and counties, the following uses native JavaScript to implement this function:
First, we will show you the test results:
When no selection is made:
When selecting:
The Code is as follows:
<! DOCTYPE html>
Of course, the provinces, cities, and counties are dynamically linked. As long as the top-level content changes, all sub-level content will also change or be reset to City or Country.
The above is the native JavaScript provided by the editor for you to implement the code of the dynamic provincial/municipal/county-level linkage drop-down box menu instance, hoping to help you.
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