In Typescript, is it feasible to specify a type for a variable where the values can be any value except for one (or any other number of values)? For instance:
let variable: NOT<any, 'number'>
This variable can hold any type of value except for 'number'.
When working with Typescript, you can make use of the Exclude helper function that utilizes Conditional Types introduced in version 2.8. The purpose of Exclude<T, U> is to essentially evaluate whether a particular type T extends another type U. If this condition is met, it will result in the type never; otherwise, it will retain the original type T.
function checkType<T>(value: Exclude<T, number>): void {
console.log('This is not a number!');
}
checkType('example');
checkType([1]);
checkType(1); // This call will fail
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