The Extended Date type is indicating that the function cannot be located

Question

The Extended Date type is indicating that the function cannot be located

I came across this helpful gist with date extensions: https://gist.github.com/weslleih/b6e7628416a052963349494747aed659

However, when attempting to use the functions, I encountered a runtime error stating:

TypeError: x.isToday is not a function

I found a workaround by importing the extensions into the file where they are used, like this:

import 'src/date.extensions';

This solution seems a bit hacky. How can we ensure that others know to import these extensions in order for the date extension methods to work?

Does anyone have a more elegant solution?

(or perhaps this is the wrong approach. I'm more familiar with C# where method extensions are common)

typescript

Answer 1

Answer №1

In both Typescript and Javascript, it's not advisable to use method extension. Instead, my suggestion is to create an exported function that accepts a date and outputs a boolean value. Here is an example implementation:

const isToday = (date: Date): boolean => {
  const now = new Date();
  const inputDay = date.getDay();
  const inputMonth = date.getMonth();
  const inputYear = date.getFullYear();

  const nowDay = now.getDay();
  const nowMonth = now.getMonth();
  const nowYear = now.getFullYear();
  return (
    nowDay === inputDay && nowMonth === inputMonth && nowYear === inputYear
  );
};

Answer 2

In both Typescript and Javascript, it's not advisable to use method extension. Instead, my suggestion is to create an exported function that accepts a date and outputs a boolean value. Here is an example implementation:

const isToday = (date: Date): boolean => {
  const now = new Date();
  const inputDay = date.getDay();
  const inputMonth = date.getMonth();
  const inputYear = date.getFullYear();

  const nowDay = now.getDay();
  const nowMonth = now.getMonth();
  const nowYear = now.getFullYear();
  return (
    nowDay === inputDay && nowMonth === inputMonth && nowYear === inputYear
  );
};

The Extended Date type is indicating that the function cannot be located

Answer №1

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