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问如何将参数传递给getElementById方法？
EN

Stack Overflow用户

提问于 2021-03-04 20:06:25

回答 2查看 73关注 0票数 0

使用一种显示信息的方法，8个面板(当每个面板被点击时，它会扩展下面的内容)--但是我试图添加样式，以便当一个面板被点击(活动)时，背景颜色更新为绿色，当单击一个新元素时被移除。我似乎无法将tabName参数传递给getElementById，因此目前该参数被硬编码为banking-tab (单击后会更新为绿色)。有没有人对最好的解决方案和潜在的方法有任何建议来探索删除功能？

function onExpandFuncs(tabName) {
  openTab(tabName);
  styleTab(tabName);
}

function openTab(tabName) {
  var i, x;
  x = document.getElementsByClassName('containerTab');
  for (i = 0; i < x.length; i++) {
    x[i].style.display = 'none';
  }
  document.getElementById(tabName).style.display = 'block';
}

function styleTab(tabName) {
  document.getElementById('banking-tab').classList.add('active-column');
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

/* The grid: Four equal columns that floats next to each other */
.column {
  background-color: black;
  float: left;
  width: 25%;
  height: 226px;
  padding: 50px;
  text-align: center;
  font-size: 16px;
  cursor: pointer;
  color: white;
}
.active-column {
  background-color: green;
  float: left;
  width: 25%;
  height: 226px;
  padding: 50px;
  text-align: center;
  font-size: 16px;
  cursor: pointer;
  color: white;
}

.containerTab {
  padding: 20px;
  color: white;
}

/* Clear floats after the columns */
.row:after {
  content: '';
  display: table;
  clear: both;
}

/* Closable button inside the container tab */
.closebtn {
  float: right;
  color: white;
  font-size: 35px;
  cursor: pointer;
}

.arrow-down {
  width: 25px;
  height: 25px;
}

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link rel="stylesheet" href="styles.css" />
    <script src="index.js"></script>
  </head>
  <body>
    <div style="text-align: center">
      <h2>Expanding Grid</h2>
      <p>Click on the boxes below:</p>
    </div>

    <!-- Four columns -->
    <div class="row">
      <div id="banking-tab" class="column" onclick="onExpandFuncs('b1');">
        <img src="./Icons/Banking.svg" />
        <p>Banking</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div id="regtech-tab" class="column" onclick="onExpandFuncs('b2');">
        <img src="./Icons/Regtech.svg" />
        <p>RegTech</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div id="insurtech-tab" class="column" onclick="onExpandFuncs('b3');">
        <img src="./Icons/InsurTech.svg" />
        <p>InsurTech</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div id="lending-tab" class="column" onclick="onExpandFuncs('b4');">
        <img src="./Icons/Lending.svg" />
        <p>Lending</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
    </div>

    <!-- Full-width columns: (hidden by default) -->
    <div id="b1" class="containerTab" style="display: none; background: black">
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h3>Banking</h3>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b2"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h2>RegTech</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b3"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h2>InsurTech</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b4"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h2>Lending</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <!-- Bottom four columns -->
    <div class="row">
      <div class="column" onclick="openTab('b5');">
        <img src="./Icons/Accounting.svg" />
        <p>Accounting</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div class="column" onclick="openTab('b6');">
        <img src="./Icons/Payments.svg" />
        <p>Payments</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div class="column" onclick="openTab('b7');">
        <img src="./Icons/Quote.svg" />
        <p>Quote Aggregators</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div class="column" onclick="openTab('b8');">
        <img src="./Icons/WealthTech.svg" />
        <p>WealthTech</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
    </div>

    <div
      id="b5"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h2>Accounting</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b6"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h2>Payments</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b7"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h2>Quote</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b8"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h2>WealthTech</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>
  </body>
</html>

任何帮助都是非常感谢的！

css

dom

getelementbyid

javascript

html

回答 2

Stack Overflow用户

回答已采纳

发布于 2021-03-04 20:19:44

您所需要做的就是遍历所有选项卡元素，并在每个选项卡上设置一个click处理程序，该处理程序将设置this的背景色，这将表示处理事件的元素。不需要知道或使用id (如果可能的话，应该避免使用它，因为它们的使用会产生脆弱的代码)。

还有don't use .getElementsByClassName()。

我删除了与这个问题无关的所有onclick属性，以避免在这里的代码中没有包含回调中的错误。

// Get all the tabs into a collection
// (don't use .getElementsByClassName()!)
let tabs = document.querySelectorAll(".column");

// Loop over all the tabs
tabs.forEach(function(tab){
  // Set up a click event handler on each of the tabs
  tab.addEventListener("click", function(event){
    // Loop over all the tabs and remove the active class
    tabs.forEach(function(tab){
      tab.classList.remove("active-column");
    });
  
    // Set the background of the clicked tab
    this.classList.add("active-column");
  });

});

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

/* The grid: Four equal columns that floats next to each other */
.column {
  background-color: black;
  float: left;
  width: 25%;
  height: 226px;
  padding: 50px;
  text-align: center;
  font-size: 16px;
  cursor: pointer;
  color: white;
}
.active-column {
  background-color: green;
  float: left;
  width: 25%;
  height: 226px;
  padding: 50px;
  text-align: center;
  font-size: 16px;
  cursor: pointer;
  color: white;
}

.containerTab {
  padding: 20px;
  color: white;
}

/* Clear floats after the columns */
.row:after {
  content: '';
  display: table;
  clear: both;
}

/* Closable button inside the container tab */
.closebtn {
  float: right;
  color: white;
  font-size: 35px;
  cursor: pointer;
}

.arrow-down {
  width: 25px;
  height: 25px;
}

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link rel="stylesheet" href="styles.css" />
    <script src="index.js"></script>
  </head>
  <body>
    <div style="text-align: center">
      <h2>Expanding Grid</h2>
      <p>Click on the boxes below:</p>
    </div>

    <!-- Four columns -->
    <div class="row">
      <div id="banking-tab" class="column">
        <img src="./Icons/Banking.svg" />
        <p>Banking</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div id="regtech-tab" class="column">
        <img src="./Icons/Regtech.svg" />
        <p>RegTech</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div class="column">
        <img src="./Icons/InsurTech.svg" />
        <p>InsurTech</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div class="column">
        <img src="./Icons/Lending.svg" />
        <p>Lending</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
    </div>

    <!-- Full-width columns: (hidden by default) -->
    <div id="b1" class="containerTab" style="display: none; background: black">
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h3>Banking</h3>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b2"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span class="closebtn"
        >&times;</span
      >
      <h2>RegTech</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b3"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span class="closebtn"
        >&times;</span
      >
      <h2>InsurTech</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b4"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span class="closebtn"
        >&times;</span
      >
      <h2>Lending</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <!-- Bottom four columns -->
    <div class="row">
      <div class="column" >
        <img src="./Icons/Accounting.svg" />
        <p>Accounting</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div class="column" >
        <img src="./Icons/Payments.svg" />
        <p>Payments</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div class="column" >
        <img src="./Icons/Quote.svg" />
        <p>Quote Aggregators</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
      <div class="column" >
        <img src="./Icons/WealthTech.svg" />
        <p>WealthTech</p>
        <img class="arrow-down" src="./Icons/arrow-down.png" />
      </div>
    </div>

    <div
      id="b5"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h2>Accounting</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b6"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h2>Payments</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b7"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h2>Quote</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>

    <div
      id="b8"
      class="containerTab"
      style="display: none; background: lightgrey"
    >
      <span onclick="this.parentElement.style.display='none'" class="closebtn"
        >&times;</span
      >
      <h2>WealthTech</h2>
      <p>
        Lorem ipsum dolor sit amet, te quo doctus abhorreant, et pri deleniti
        intellegat, te sanctus inermis ullamcorper nam. Ius error diceret
        deseruisse ad
      </p>
    </div>
  </body>
</html>

票数 1

Stack Overflow用户

发布于 2021-03-04 20:25:21

您正在尝试处理两个不同的元素。因此，您需要传递两个不同的id in click函数。如下所示

function onExpandFuncs(tabName, clickedTab) {
  openTab(tabName);
  genericStyleTab(clickedTab);
}

function genericStyleTab(clickedTab) {
  document.getElementById(clickedTab).classList.add('active-column');
}

      <div id="banking-tab" class="column" onclick="onExpandFuncs('b1', 'banking-tab');">

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/66482281

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