Use strict equality/inequality operator & use const/let over var #228
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The current implementation of the polyfill uses equality/inequality operators that only compare the underlying values of two operands and don't check their types. Using strict equality/inequality operators enhances the code as even the types of operands are checked.
The current implementation also uses
varfor declaring variables in contrast to usingletandconst. Since the polyfill is transpiled, it is safe to useletandconstovervar.