javascript - .animate step TypeError: object is not a function -


i building svg animations using raphael.js. trying build pie chart. call function within step option through .animate() method.

the error get: uncaught typeerror: object not function line: pie_fill.attrs({'path': arc(1, 2, 3, 4)});

it doesn't understand arc() function @ within step option. have no idea why, please help.

var r = raphael("paper"); pie_fill = r.path(("m 150 77 l77 77 z")).attr({'fill':'#009bca', 'stroke':'#1c1c1c', 'stroke-opacity':'1', 'stroke-width':'1'});  var pie = new raphael($('#paper'), 300, 154);     $('#paper').animate({             'margin': '0'         }, {             'duration': 1500,             step: function( now, fx ) {                 pie_fill.attr({'path': arc(1, 2, 3, 4)});             }         });      arc =function(center, radius, startangle, endangle) {         console.log('ran')     };

arc defined after called.

if write function arc(...) instead of arc = function(...) should work.


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