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JavaScript Getting Started With ES2015 Defining Variables With let and const Creating Unchanging Variables With const

Robert O'Toole
Robert O'Toole
6,366 Points
Posted by Robert O'Toole
Robert O'Toole
6,366 Points

const vs var

does this essentially get rid of the headaches with all that global/local scope stuff?

2 Answers

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

All variables have scope that depends on where they are declared. But those declared with "var" have function scope, and those declared with "const" or "let" have block scope.

There are other differences as well. See the MDN pages on var, const and let for more details.