jQuery operation drop-down list box implementation code_jquery

Option1
Option2
Option3
Option4


1. Get the jQuery object
obj = $('#select1');

2. Get the length of Options
len = $('#select1 option').length

3. Traverse options
for (var i = 0; i option_value = obj[0].options[i].value;
option_text = obj [0].options[i].text;
}

4. Get the selected value
obj_value = $('#select1').val();

5. Get the text corresponding to the selected value
obj_text = obj[0].options[obj[0].selectedIndex].text;

6. Add an option
obj.append(' Option5');

7. Delete an option
$('#select1 option[value="1"]').remove();