Important changes in angular 4

These are some of the important changes related to angular 4

• Skipping angular 3.0 to angular 4.0 so we can align core with the router which is already 3.0
• Compiler is faster compared to angular 2
• Some of the bugs which are in angular 2 are rectified in angular 4
• Else clause has been introduced 

 
 

• Render has been renamed to Renderer2 (Reason this was done is because under the hood there were lot of changes)

   

• Email Validator has been added

                 

• Typescript 2 is supported
• Flat modules which makes importing easier behind the scene. This would allow build tool to tree shake the code( Code which are not used would be removed )

Note: There were breaking changes in typescript 2.0  One the changes are file format is not backward compatible.