ngif else angular 4 code example

Example 1: ngif else

  Welcome back, friend.



  Please friend, login.

Example 2: ng if else

Content to render when condition is true.
Content to render when condition is false.

Example 3: ngif else

  

    Welcome back, friend.
  


  

    Please friend, login.
  

Example 4: ngif

         
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--While (t/f boolean variable called "flag") is true
  This button will be visible + click button executes function
  Once this "flag" becomes false this button disapears