It has become standard to offer sharing functionality via major platforms such as Facebook, Twitter and LinkedIn on websites. Most of the platform providers have multiple options for inserting their sharing features often including the use of an iFrame.
Eugene O’Neill (Web Developer for LinkedIn) has stated:
1) IN.Parse() and IN.Init() are here to stay. While we do employ the policy that any undocumented methods may or may not be supported indefinitely, these two are uniquely crucial to the functionality of the framework. The amount of work it would require to remove IN.Parse()… I don’t even want to think about it. IN.Init() is our preferred method for loading the framework asynchronously and won’t be going anywhere. Feel free to use either method.