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I have a number of aspx pages (50+). I need to declare a number(5-7) of global variables in each of these pages. Variables in one page independent of the other pages even though some might be same.
Currently I am declaring at the page top and outside of any function.
Should I approach this differently and is there any side effects of this approach?
If exact duplicate, please let me know. Thanks
561
Function Arguments. The simplest way to avoid globals all together is to simply pass your variables using function arguments. As you can see, the $productData array from the controller (via HTTP request) goes through different layer: The controller receives the HTTP request.
Using global variables causes very tight coupling of code. Using global variables causes namespace pollution. This may lead to unnecessarily reassigning a global value. Testing in programs using global variables can be a huge pain as it is difficult to decouple them when testing.
It is best practice to not clutter the global scope. Especially since other frameworks or drop-in scripts can pollute or overwrite your vars.
Create a namespace for yourself
https://www.geeksforgeeks.org/javascript-namespace/
More here: https://stackoverflow.com/search?q=namespace+javascript+global
Some examples using different methods of setting the vars
myOwnNS = {}; // or window.myOwnNS myOwnNS.counter = 0; myOwnNS["page1"] = { "specificForPage1":"This is page 1"} myOwnNS.page2 = { "specificForPage2":"This is page 2", "pagenumber":2} myOwnNS.whatPageAmIOn = function { return location.href.substring(location.href.lastIndexOf('page')+4)} If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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