What is the best way to streamline this JavaScript code using function chaining?

Can you simplify these function calls by chaining them? Is there a way to combine forEach, push, array destructuring, and map?

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

Is it possible to achieve something like this with function chaining:

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

Answer №1

Here is the solution:

['x', 'y'].flatMap(selector => {
    return Array.from(document.querySelectorAll(selector)));
  }).forEach(element => {
    element.doSomething();
  });

Just to clarify, that specific "instance" you provided needs to be formatted as follows:

new Set(items.map(item => item.category));

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