The functions and differences between disabled and readonly
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1: readonly is to lock this control so that it cannot be modified on the interface (but it can be modified through JavaScript). 2: disabled and readonly have the same point that they can lock the control so that users cannot change its value, but disabled is more thorough. It prevents you from using it at all, including changing its background color (if you don't believe it, try to modify a disabled input text box and you will find that your efforts are in vain). If it is a checkbox, it cannot be selected. 3: All controls have a disabled attribute, but not necessarily a readonly attribute. Such as select drop-down box |
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