无法在模板字符串中使用forEach函数进行输出

Question

const categoriesLght = document.querySelectorAll('#categories .item').length;
console.log(`There are ${categoriesLght} clasifications.`);
const h2s = document.querySelectorAll('h2');
const heading = h2s.forEach(element =>
  console.log(`Clasification: ${element.textContent}`),
);

const quantity = document.querySelectorAll('h2 + ul');
quantity.forEach(el =>
  console.log(`Quantity: ${el.childElementCount}`),
);

输出：

There are 3 clasifications.
Clasification: Student
Clasification: Fish
Clasification: Rocket
Quantity: 3
Quantity: 5
Quantity: 6

如果尝试将函数放在模板字符串中，将出现错误。试图找到一种方法来实现它。所需的输出是：

Clasification: Student
Quantity: 3 
Clasification: Fish
Quantity: 5
Clasification: Rocket
Quantity: 6

而且我正在寻找一种方法，如何将ForEach方法的结果放入模板字符串中，以使类似的事情发生（我想我正在寻找一些解构方法：]

str = [h2s.forEach, quantity.forEach]([category, count])=> (console.log(`Clasification: ${category.textContent},
Quantity: ${count.childElementCount} `));

Answer 1

循环一个，并使用索引引用另一个

const h2s = document.querySelectorAll('h2');
const quantity = document.querySelectorAll('h2 + ul');

h2s.forEach((element, i) =>
  console.log(`Classification: ${element.textContent}, Quantity: ${quantity[i].childElementCount}`),
);

Answer 2

您可以先将值保存到变量中：

const clarifications = [];
const quantities = [];

const h2s = document.querySelectorAll('h2');
const heading = h2s.forEach(element =>
    clarifications.push(element.textContent);
);

const quantity = document.querySelectorAll('h2 + ul');
quantity.forEach(el =>
    quantities.push(el.childElementCount);
);

clarifications.forEach((clarification, i) => {
    console.log('Clarification:', clarification);
    console.log('Quantity:', quantities[i]);
});