To initialize a method or function at runtime in TypeScript, we can use the Function constructor. This constructor takes a string of code as its parameter and returns a new function object that executes the code.
Here is an example of initializing a function at runtime using the Function constructor:
const add = new Function('a', 'b', 'return a + b');
console.log(add(2, 3)); // Output: 5
This code creates a new function called add by passing a string of code to the Function constructor, which takes two arguments a and b and returns their sum.
We can also pass an entire function body as a string to the Function constructor, like this:
const multiply = new Function('a', 'b', 'return a * b;');
console.log(multiply(2, 3)); // Output: 6
In this example, we create a new function called multiply that takes two arguments a and b and returns their product.
Note that using the Function constructor to create functions at runtime can be risky because it can execute arbitrary code. We should only use it when necessary and with caution.