Checks whether the object is an empty object.

Encountered a problem in the project

1. check whether a group of checkboxes are selected

2. if selected, return the corresponding name value.

3. If none is selected, a false value is returned.

Solution

VaR checklist_box = function (Param, output) {var $ Boolean, $ result ={}; if (PARAM) {If (typeof Param = 'string ') {$ Boolean = $ (PARAM ). prop ('checked ')? True: false; $ result ['name _ '+ Param] = $ (PARAM ). ATTR ('name')} else if (typeof Param = 'object') {$. each (Param, function (I, n) {if ($ (n ). prop ('checked') {$ Boolean = true; $ result ['name _ '+ N] = $ (n ). ATTR ('name') ;}}) // you need to determine whether the object is empty. // The first incompatible method is first written, finally, we found that if (JSON. stringify (result) ===' {} ') {$ Boolean = false; return false} // method 2, using the enumerated object method $ Boolean = checkobj (result) if ($ Boolean) {return result} else {return false }}} else {return false} return result}

The checkobj () method is as follows:

var checkObj = function(param){  if(typeof param !== ‘object’ || param === ‘null’){       return false   }  else{    var k =0;    for (var  i in param){        if(param.hasOwnProperty(n)){               k++        }    }    return !!k}}

 

Finished !!

After writing, I suddenly found myself stupid. I can use the selector in jquery to do the same thing.

 

var arr = $(':checkbox")var result = {}$.each(arr,function(i,n){  if($(this).prop("checked")){   result['name'+n] = $(this).attr('name') }  return result})

Let's leave a lesson !!!