What No One Tells You About Global Variables In JavaScript

Global Variables JavaScript

Global variables are evil and can make code more complex and difficult to understand. They can also pollute the global namespace and cause memory leaks, making things slower and slower and slower until our browsers crash. To avoid or minimize their use, developers should only declare a few variables and avoid variable collisions. Collision between script tags in an HTML file creates a lot of possible bugs, so how do we solve this issue? Scopes and scope genes are used to avoid global variables.

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