javascript - including "-" in $.extend from jquery -


i trying create simple jquery plugin. problem when change name of settings's properties backgroundcolor1 background-color1 or include "-" in property name, compiler not allow me it.

why that?

  (function ( $ ) {         $.fn.greenify = function( options ) {             // easiest way have default options.          var settings = $.extend({              // these defaults.              color: "#556b2f",              backgroundcolor1: "white"          }, options );             // greenify collection based on settings variable.          return this.css({              "color": settings.color,              "background-color": settings.backgroundcolor1          });         };     }( jquery ));      $(document).ready(function () {                $("h2").greenify({ color:"red",backgroundcolor1:"yellow"});        })
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>    <h2> test</h2>

i have added code, can try using background-color1 in place of backgroundcolor1, , see compiler not allowing this.

you can use quoted object keys:

$.fn.greenify = function (options) {     var settings = $.extend({         "color": "#556b2f",         "background-color": "white"     }, options);      return this.css({         "color": settings["color"],         "background-color": settings["background-color"]     }); }  $("h2").greenify({ "color": "red", "background-color": "yellow" });

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