John Cannon
Full Stack JavaScript Techdegree Student 3,161 PointsBefore ES6
Ok I understand why we should use let instead of var in a for loop. But before ES6 how did programmers solved the issue of var in a for loop since there was no let
Thanks
2 Answers
Steven Parker
177,727 PointsThe classic technique was to use an immediately invoked anonymous function to create what is known as a "closure". That gave the variable created with "var" a unique and persistent scope similar to what you get with "let".
John Cannon
Full Stack JavaScript Techdegree Student 3,161 PointsThanks
John Cannon
Full Stack JavaScript Techdegree Student 3,161 PointsJohn Cannon
Full Stack JavaScript Techdegree Student 3,161 PointsCan you give me an example
Steven Parker
177,727 PointsSteven Parker
177,727 PointsEven better, I can point you to the Understanding Closures in JavaScript workshop.