Scope of Script Tags

Here is the simple test for you, assume that the following

<script type="text/javascript">
        var a = 3;

<script type="text/javascript">
        alert(a + 1);

What will be the result in the pop-up alert?

If you said browser will display an error like "a is not defined", you are wrong :) Browsers interpret all the script tags inside the page (also the imported .js files) in the same scope. Therefore, number a is a global variable and alert will display 4 in the pop-up.


Anonymous said…
So how does one include a remote script with a custom (non-global) scope?

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