JavaScript
was primarily designed to run in the user interface (top) tier of a web
application.
<span>
To add, </span>JavaScript<span>, <span>often
abbreviated as "JS", is a high-level, dynamic, untyped, interpreted
run-time language. It has been standardized in the ECMAScript language
specification.</span></span>
Answer:
Global variable
Explanation:
You should avoid using global variables in a program because global variables can be accessed by any part of the code and every function or any part of the code has the tendency to alter or modify its value. One can't limit the scope or in other words one cant simply force any part of the program not to use them or modify it's values. Testing of large programs also becomes difficult as it is hard to keep track of the functions reading and modifying the values of global variables