php - onchange select reset after selecting

Question

Select cannot be repeated after selection. Is there any way to repeat the previous option

Answer 1

I solved this problem myself. Repeatedly selecting the option select drop-down list box cannot trigger the onchange function; I wrote an object.selectedIndex = 0; which is equivalent to resetting the select option option, and the onchange function can be triggered repeatedly

Answer 2

Please explain your scenario more clearly, and this is an html/javascript issue