This review is going to be a little harsh, I'm afraid. This is because I believe you'll be able to take it in, and apply it in future posts to get better.
In my previous moderation comment about a different post of yours, I wrote "We expect posts in the Blog category to have significantly more content." This post had significantly less content than that one did. I'm going to promote my own work here by recommending that you read my recent post How To Write a Great Utopian Blog Post. In that post, I talk about what we mean by "editorial content," and why we want more of it.
As short as the post is, it still has issues of style, grammar, and proofreading.
"Now pass the object in it's method to freeze it" is a confusing sentence to begin with, but I'm willing to accept that may be due to my own lack of technical proficiency. What isn't is the fact that "it's" means "it is," and I'm pretty sure you meant to write "its."
"In result" is not a phrase in English. I think you meant "as a result."
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RE: Fast Freeze - Make an object read only in Javascript