Set select to be read-only and not editable and the value of select to be transferable

When the attribute is set to disabled, the value of select cannot be passed when submitting the form. Just remove the disabled attribute before submitting. 1.

This method can make the drop-down box no different from usual, and it will not look any different. The only difference is that after you pull down and select them individually, it will not offend you. Selecting them is the same as not selecting them. Just ignore the customer's choice.

2. Set the disabled attribute

This seems more direct, Intuitively, it feels like it is read-only, and you cannot click or pull down. The words inside will also turn gray

When the attribute is set to "disabled", the value of select cannot be passed when submitting the form. Remove the disabled attribute before submitting $("#role").removeAttr(" disabled");

jquery adds attribute $("#role").attr("disabled","disabled");

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