1- const, let 2- () => {} 5- destructuring: const {name} = {name: "abc"} 6- retrieve object: event && event.name && event.name.last 7- promise , callback 8- functinoal programming
3- if(!something) 4- unit test, mock
1- const, let 2- () => {} 5- destructuring: const {name} = {name: "abc"} 6- retrieve object: event && event.name && event.name.last 7- promise , callback 8- functinoal programming
3- if(!something) 4- unit test, mock