jQuery get selected option from combobox [closed]

I have a combobox like this

after that, I have a checkbox. If the checkbox is checked, I want to copy the value of the combobox to an input of text. I write a jQuery code like this to get the value, then I set the value of combobox to an input of text

i check console to see the result.

I get the value if I check the log. But the value can’t set into input text.

But, if I make a little change in jQuery to get the key of combobox, the key can be set in the input text.

Then,in the input text I can get the key of combobox

I need help for this.

Answer

Your code should work. Please provide the HTML (not the templating code)

Simplified:

$("#customCheck1").on("click", function() { 
  const text = this.checked ? $("#province option:selected").text() : ""; 
  $("#current_province").val(text);
});`

assuming unique IDs