我想让for循环的功能在按键或鼠标按下时一个一个执行

i want the function of for loop to perform one by one when a key or mouse is pressed

<div id="text">Nature in the broadest sense is the physical world or universe</div>
let el = document.getElementById(text);
let eltext = el.innerText;
let final = eltext.split(" ");
let i;
for (i = 0; i < final.length; i++) {
 if (final[i] === "the") {
   final[i] = `<b>${final[i]}</b>`;
 }
let result = (final + " ").replace(/,/g, " ");
el.innerHTML = result;

结果将是: 最广义的自然是物质世界或宇宙

我想要的: 当第一次触发任何键时: 最广义的自然是物理世界或宇宙

任意键第二次触发时: 广义上的自然是物理世界或宇宙

任意键第三次再次触发时: 最广义的自然是物理世界或宇宙

而不是 for 循环,我建议您使用 built-in Array 方法以获得更好的可读性。在这里,我扩展了您的示例句子,以展示它如何适应包含更多目标词的更长句子。

const text = document.querySelector('#text').innerText.split(' ');
const indices = text.map((word, index) => word === 'the' ? index : 0)
  .filter(i => i !== 0);
  
let highlightIndex = 0;

function toggle() {
  const arr = [...text];
  arr[indices[highlightIndex]] = `<strong style="color: red;">${arr[indices[highlightIndex]]}</strong>`;
  document.querySelector('#text').innerHTML = arr.join(' ');
  highlightIndex += 1;
  if (highlightIndex > indices.length -1 ) highlightIndex = 0;
}

window.addEventListener('keydown', toggle);
window.addEventListener('click', toggle);
<div id="text">Nature in the broadest sense is the physical world or universe. Introduce the article here for testing the code.</div>