将列表中的项目显示到 div 中

Question

我有两个 div 标签，里面有列表。使用 Javascript，我尝试将“intoleranceList”中的每个项目放入字符串中，然后将其显示在“info”div 标记中。有人可以帮忙吗？这是我的 Javascript 试图做到这一点。var area= document.getElementById("info");var listArea = document.getElementById("intoleranceList").getElementsByTagName("li");var intoleranceArray = [];for(let i = 0; i < listArea.length; i++) {   intoleranceArray[i] = listArea[i].innerHTML;}var intoleranceString = intoleranceArray.toString();area.innerHTML = intoleranceString;<div id = "intoleranceList">  <ul class = "list">    <li>One</li>    <li>Two</li>    <li>Three</li>  </ul></div><div id = "nonIntoleranceList">  <ul class = "list">    <li>One</li>    <li>Two</li>    <li>Three</li>  </ul></div><div id = "info"></div>

Answer 1

你可以这样做：

const intolanceList = document.querySelectorAll("#intoleranceList > ul > li");//only select li's inside a ul tag and inside a intoleranceList id

const info = document.getElementById("info");

const text = [];

intolanceList.forEach(i => {

  text.push(i.textContent)//catch every text and push to array

})

info.textContent = text.join(" ")//catch array and transform in string with spaces between itens

Answer 2

我尝试使用 Javascript ES5 来实现这一点：

window.onload = function () {

  var intoleranceList = document.querySelectorAll('#intoleranceList li');

  var intoleranceListStrings = getStringListFromLi();

    AddStringsToInfo(intoleranceListStrings);

  function AddStringsToInfo(arr) {

    var infoElement = document.getElementById('info');

    infoElement.textContent = arr.join(',');

  }

  function getStringListFromLi(){

    var intoleranceListStrings = [];

    for(var i=0;i<intoleranceList.length;i++){

      intoleranceListStrings.push(intoleranceList[i].textContent);

    }

    return intoleranceListStrings;

    }

}

<div id="intoleranceList">

  <ul class="list">

    <li>One</li>

    <li>Two</li>

    <li>Three</li>

  </ul>

</div>

<div id="nonIntoleranceList">

  <ul class="list">

    <li>One</li>

    <li>Two</li>

    <li>Three</li>

  </ul>

</div>

<div id="info"></div>

并使用ES6

window.onload =  () => {

  const intoleranceList = document.querySelectorAll('#intoleranceList li');

  const AddStringsToInfo = (arr) =>  {

    const infoElement = document.getElementById('info');

    infoElement.textContent = arr.join(',');

  }

  const getStringListFromLi = () => {

    const intoleranceListStrings = [];

    for(let i=0; i<intoleranceList.length ;i++){

      intoleranceListStrings.push(intoleranceList[i].textContent);

    }

    return intoleranceListStrings;

    }

  const intoleranceListStrings = getStringListFromLi();

    AddStringsToInfo(intoleranceListStrings);

  

}

<div id="intoleranceList">

  <ul class="list">

    <li>One</li>

    <li>Two</li>

    <li>Three</li>

  </ul>

</div>

<div id="nonIntoleranceList">

  <ul class="list">

    <li>One</li>

    <li>Two</li>

    <li>Three</li>

  </ul>

</div>

<div id="info"></div>