Add helper functions and constants to public/src/ajaxify.js to reduce cognitive complexity

[Sharkesh111]

Edited the function(e) function by extracting redundant code and putting them in helper functions and making constants for them. Created the function andHelper to reduce the amount of &&'s in the code and reduce the the overall cognitive complexity. Also added const internalLinkAndHref which represented a value that was used multiple times in the code and had multiple &&'s in it.

Tested the changes by adding test cases that cover the public/src/ajaxify.js file and running npm run lint and npm run test. Also manually checked code by interacting with UI and triggering console.log

Resolves #107

[coveralls]

Pull Request Test Coverage Report for Build 12940941895

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.003%) to 82.674%

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Files with Coverage Reduction	New Missed Lines	%
src/meta/errors.js	1	83.72%

Totals
Change from base Build 12896760049:	0.003%
Covered Lines:	22323
Relevant Lines:	25582

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💛 - Coveralls