What is the significance of, and the reason for, wrapping the entire content of a JavaScript source file in a function block?

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In javascript, only functions create local scope. It is possible you may accidently declare variables with same name as being used on other libraries or your own code cause errnaneous results in your code or third party code. To avoid such global scope pollution, it is recommended to enclose your code...
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In javascript, only functions create local scope. It is possible you may accidently declare variables with same name as being used on other libraries or your own code cause errnaneous results in your code or third party code. To avoid such global scope pollution, it is recommended to enclose your code in IIF (Immediatly invoked functions) or also called Self Invoking Functions, you can avoid global scope issues. read less
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