javascript - $.extend property not working -


recently discovered $.extend , applied on code:

var chartfactory = function(options) {     this.defaults = {         type: "line",         width: "800",         height: "500",         heightscale: {             domain: ["0", "250"],             range: ["300", "0"]         },         widthscale: {             domain: ["0", "250"],             range: ["0", "900"]         },         yaxis: {             ticks: ["5"],             scale: "heightscale",             orient: "left"         },         xaxis: {             ticks: ["10"],             scale: "widthscale",             orient: "bottom"         }     };     $.extend(this.options, options, this.defaults); };

i have chartfactory class linechart object of it.

edit: trying merge contents of object values default values such values of new object has been made retained , resultant should on new object.

var linechart = new chartfactory({     type: "line",     xaxis: {         ticks: ["20"],         scale: "widthscale",         orient: "bottom"     } });

so when consoled linechart(console.log(linechart),this came up: enter image description here

the linechart.xaxis.ticks should have been "20".

what doing wrong?

you have create this.options first, merge other 2 objects object, passing this.defaults first, options, latter overwrite properties in former

var chartfactory = function(options) {     this.defaults = {         type: "line",         width: "800",         height: "500",         heightscale: {             domain: ["0", "250"],             range: ["300", "0"]         },         widthscale: {             domain: ["0", "250"],             range: ["0", "900"]         },         yaxis: {             ticks: ["5"],             scale: "heightscale",             orient: "left"         },         xaxis: {             ticks: ["10"],             scale: "widthscale",             orient: "bottom"         }     };     this.options = {};     $.extend(this.options, this.defaults, options); };  var linechart = new chartfactory({     type: "line",     xaxis: {         ticks: ["20"],         scale: "widthscale",         orient: "bottom"     } });

fiddle


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