<p>我想知道如何通过链式调用来简化这些函数调用。是否有一种方法可以将forEach、push、解构数组和map链接在一起使用。</p> <pre class="brush:php;toolbar:false;">let selectorsForLoader = ['a', 'b']; let loadingElements = []; selectorsForLoader.forEach(selector =&gt; { loadingElements.push(...Array.from(document.querySelectorAll(selector))); }); let loaders = loadingElements.map(loadingElement =&gt; { loadingElement.doSomething(); });</pre> <p>这是一个例子：</p> <pre class="brush:php;toolbar:false;">food.map(item =&gt; item.type) .reduce((result, fruit) =&gt; { result.push(fruit); return [...new Set(result)]; }, []);</pre> <p><br /></p>

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

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