These list of topics:

• data types
• arrays and objects
• loops and iteration
• conditionals
• functions
• higher-order functions
• callbacks
• closures

‍

These are topics you should be familiar with for the Technical Check-in:

• explicit vs implicit coercion
• statements vs expressions
• scope
• various array, object, and string methods and what they return
• working with arrays / objects without mutating them
• dot notation vs bracket notation
• pass by value vs pass by reference
• function declarations vs function expressions
• for/in vs for/of