JavaScript Sort Error: 'Arithmetic operations can only be performed on variables of type 'any', 'number', 'bigint', or an enum type'

Encountering an error in my Angular 7 project related to the sort function in TypeScript. The error message states: "The right-hand side of an arithmetic operation must be of type 'any', 'number', 'bigint' or an enum type'".

Interesting workaround involves commenting out the function initially, running the application, and then uncommenting the function post-application launch to get it working as expected with the sort functionality included.

Specifically, attempting to sort dates in descending order.

    this.SortArray = this.project.Attributes.sort(function (a, b) {

        return new Date(a.EffDate) - new Date(b.EffDate);
      });

Answer №1

When implementing a sort function, remember to use the following code:

return new Date(a.EffDate).getTime() - new Date(b.EffDate).getTime();

In TypeScript, comparing dates directly is not allowed, therefore you need to convert them into numbers before performing any comparison.

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