CODEWITHSUNDEEP
javascripthtml
Nikhil J Joshi
Nikhil J Joshi

Reputation: 1197

Capturing a function from a webpage

(This is perhaps better checked with Facebook page.)

The Facebook page has a function 

 onclick="return fc_click(this);"

bound to any comment.

If someone clicks on a comment as above, I want to let it execute the above function. But also above that I wish to capture this function itself, for further action. Is it possible?

Upvotes: 0

Views: 164

Answers (1)

Brad
Brad

Reputation: 163488

What you are looking for is called "monkey patching" or "duck punching". Basically, you replace that function fc_click() with your own, and then call fc_click().

var old_fc_click = fc_click;
fc_click = function (thisVal) {
    var result = old_fc_click.call(this, thisVal);
    console.log(result);
}

Now, this won't work so great for Facebook unless you are making a browser extension, but that is the general idea.

Upvotes: 3

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