javascript - Preset Options in Object and see if it doesn't exist in allowed properties -

i trying make preset list of options allowed in object list. here code

var = function(cmd, options){      var objlist = [options.search ,options.demand];      if(!(options in objlist)){       console.warn('not allowed * in options property');       }  };  

or should do

var = function(cmd, options){      var objlist = [search , demand];      if(!(options in objlist)){       console.warn('not allowed option in options property');       }  };  

basically want set search , demand allowed options in options property later can do

 a('cmd',{   search:'',   demand:function() {    alert('hello');     },   //warn next option not allowed   quote: function() {     alert('quote of user');    }   }); 

if having trouble understanding asking please ask , best explain bit more.

maybe writing better?

var = function(cmd, options){   options = {    theme: function(color) {     $('body').css('backgroundcolor',color);     },    color:''    };  };  a('cmd',{   theme:'#000'//though not working?  }); 

you check each property in options against array of allowed options this:

var = function(cmd, options){   var allowedoptions = ["search", "demand"];    var hasdisallowedoptions = false;    (option in options) {     if(allowedoptions.indexof(option) === -1 ) {       hasdisallowedoptions = true;       break;     }   }    // if hasdisallowedoptions true, there disallowed option }; 

jsfiddle couple test cases/examples