New JavaScript Elements
Explore new JavaScript elements including let and const for block-scoped variables, concise arrow function syntax, and the for-of loop for iterating iterable objects. Understand how these features help avoid errors, improve code modularity, and ease front-end application development.
We'll cover the following...
We'll cover the following...
Block-scope variable declarations
ES5 didn’t allow variables delimited by a pair of curly braces, { and }, to be declared or defined by a for loop. Rather, all variables declared with var, even if declared within a block, have either a function scope or a global scope. The new feature of block-scope variable declarations with let and const allows the declaration of local ...