I am working with d3.js for Data visualization. I am getting the warning shown in the following image. Does anyone have the idea why is this happening and how can I solve this? The message shown in the error is following

mutating the [[Prototype]] of an object will cause your code to run very slowly; instead create the object with the correct initial [[Prototype]] value using Object.create

I am working with d3.js for Data visualization. I am getting the warning shown in the following image. Does anyone have the idea why is this happening and how can I solve this? The message shown in the error is following

mutating the [[Prototype]] of an object will cause your code to run very slowly; instead create the object with the correct initial [[Prototype]] value using Object.create

• javascript
• firefox
• d3.js

• Does this happen when you load the library, or does it e from your usage? Which line triggers this message? – Bergi Commented Feb 23, 2015 at 14:51
• See this post on what the message means and by what kind of code it is caused. – Bergi Commented Feb 23, 2015 at 14:52
• The error is shown when I launch the page and no data are shown – user4556747 Commented Feb 23, 2015 at 14:53
• Here is the jsfiddle . Where can such error occur in my code? – user4556747 Commented Feb 23, 2015 at 15:02
• That fiddle doesn't even import d3?! In what browser are you getting this warning? – Bergi Commented Feb 23, 2015 at 15:04

1 Answer 1

Does anyone have the idea why is this happening

Looks like it's d3's fault. They seem to use it to subclass arrays here:

// Until ECMAScript supports array subclassing, prototype injection works well.
var d3_subclass = function(object, prototype) {
  object.__proto__ = prototype;
};

how can I solve this?

Ignore the warning. Or file a bug against have a look at this issue of d3.js.