JavaScript AJAX Basics (retiring) Programming AJAX Stage 2 Challenge

Manuel Rohrbach
Manuel Rohrbach
3,152 Points

Why is the declaration of variable 'var' in the ajax course used? Why not 'let'?

As learned in the JS course by treehouse I was told not to use 'var' anymore, I should use 'let' or 'const' instead. Did you use 'var' in this course so you don't have to explain the whole concept of variable declarations to people again since it's about AJAX?

1 Answer

Juan Diaz
Juan Diaz
7,661 Points

Hey there Manuel, remember that many courses have been recorded at different points in time; therefore, you might encounter teachers using 'var' since the 'let' and 'const' keywords had not been introduced yet in that specific version of JavaScript. You might as well use them in your projects but it is a matter of preference, mostly. Still, it is highly recommended to use the newest 'let' and 'const' keywords that were introduced in ECMAScript 2015 or ES6.