How can I simplify this JavaScript code by chaining functions?

Question

I would like to know how to simplify these function calls by chaining them. Is there a way to chain forEach, push, destructuring arrays and map together.

let selectorsForLoader = ['a', 'b'];
 let loadingElements = [];
    selectorsForLoader.forEach(selector => {
      loadingElements.push(...Array.from(document.querySelectorAll(selector)));
    });
    let loaders = loadingElements.map(loadingElement => {
      loadingElement.doSomething();
    });

Here is an example:

food.map(item => item.type)
  .reduce((result, fruit) => {
    result.push(fruit);
    return [...new Set(result)];
  }, []);

Answer 1

What about this

['a', 'b'].flatMap(selector => {
    return Array.from(document.querySelectorAll(selector)));
  }).forEach(loadingElement => {
    loadingElement.doSomething();
  });

By the way, the "example" you gave should be written like this:

new Set(food.map(item => item.type));