About java script

I have learnt java script as much as i can but i would like to share of my 10 certain points that you must know about (js) otherwise you might face some problem during working with that(js).First of all no.1 : variable(var),let and const.2 : if else conditional statement.3 : using array and object. 4 : for loop,while loop.5 : function,allow function.6 : spread operator,destructure (object,array) .7 : default parameter,template string.8 : map,filter,find.9 : local storage,session storage.10 : fetch ,get vs post . Now i have a boat to cross the react ocean and the real game already began …let’s face it.After bit long time i have finished react. it is not ending just beginning .