ali arif hashmi fill-drop-down-by-column library sample use steps 1 install the library by using the command 2.1 import it into your module , if there is no lazy loading then import the installed module in your app.module.ts file 2.2 if there is lazy loading so import the installed module in your child.module.ts file 3 use import statement in your desired component where you want to use this installed module 4 by using the reference variable you can easily get the methods 5 example : first argument take the value, second argument takes the column name , third argument take the object list 6 enjoy !!!