Some practical experience of checkbox operation

  • 2020-03-29 23:52:40
  • OfStack

The checkbox looks simple, and sometimes it's a pain in the neck. What's so hard about it? !
1. through $(selector).attr("checked") Can I get the actual value?  
No . checkbox After being selected once, the result is always checked 
2. through $(selector).attr("checked", true) You can make checkbox To be selected ? 
No You can try  

So what?

After the experiment, the conclusion is as follows:
 The following obj = document.getElementById("id") 
1. Get the value: $(selector).is(":checked") or $(selector).prop(":checked") return true/false 
2. Operation selection: obj.checked = true 
3. The selected obj.checked = !obj.checked 

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