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嘿伙计们，我对 JavaScript 还是比较陌生，需要一些帮助。我尝试了一些不同的东西，但我似乎无法弄清楚。我的 commandHeld 函数有问题。我函数的第一部分将我的类从“keyboard”或“keyboard_normal”更改为“keyboardCmd”。我希望第二部分根据我在 h3 标签中编写的内容将类更改回“键盘”或“键盘正常”。我将第二部分放在另一个名为 regress 的函数中，并给它一个参数 press ，因为我打算稍后重用它。

该类更改为“keyboardCmd”就好了，但是当我再次单击我的跨度时，它不会更改为“keyboard”或“keyboard_normal”。我尝试将代码从 regress () 放入 commandHeld () 而不是 regress 函数，但没有运气的类从“keyboardCmd”更改为“keyboard_normal”或“keyboard”。

“onclick”在我的 cmdLeft 和 cmdRight Spans 上。为了安全起见，我也尝试了 cmdLeft_hover 和 cmdRight_hover 跨度，但这也无济于事。

我在一个临时网站上发布了到目前为止的内容。我希望这有帮助。 http://keyboard.businesscatalyst.com/index.html

这是我的 HTML：

    <body>
    <h3 id = "changeH3Text" onClick="changeNameToLetters()">Regular Keyboard on Hover</h3>
      <div id="keyboardContainer" class="keyboard">
      <div class = "row6">

             <span id="cmdLeft" onClick="commandHeld()">
             <span class="hover"  id="cmdLeft_hover"></span>
             </span>


              <span id="cmdRight" onClick="commandHeld()">
             <span class="hover"  id="cmdRight_hover"></span>
             </span>
      </div><!--end of row 6 div-->
   </div><!--end of keyboardContainer div-->
</body>

这是我的javascript：

function changeNameToLetters() {
    //keyboard container variables
    var keyboardState = document.getElementById("keyboardContainer");
    var currentClass = keyboardState.className;

    //h3 text variables
    var h3Text = document.getElementById("changeH3Text");
    var currentText = h3Text.innerHTML;

    if (currentClass == "keyboard_normal" && currentText == "Tool Name on Hover") {
        keyboardState.className = "keyboard";
        h3Text.innerHTML = "Regular Keyboard on Hover";
    } //end if
    else {
        keyboardState.className = "keyboard_normal";
        h3Text.innerHTML = "Tool Name on Hover";
    } //end else
} //End function

function commandHeld() {
    //keyboard container variables
    var keyboardState = document.getElementById("keyboardContainer");
    var currentClass = keyboardState.className;

    //h3 text variables
    var h3Text = document.getElementById("changeH3Text");
    var currentText = h3Text.innerHTML;

    if (currentClass == "keyboard_normal" || "keyboard") {
        keyboardState.className = "keyboardCmd";

    } //End if
    else {
        regress('keyboardCmd');
    }

} //End function

function regress(pressed) {
    //keyboard container variables
    var keyboardState = document.getElementById("keyboardContainer");
    var currentClass = keyboardState.className;

    //h3 text variables
    var h3Text = document.getElementById("changeH3Text");
    var currentText = h3Text.innerHTML;

    if (currentText == "Tool Name on Hover" && currentClass == pressed) {

        keyboardState.className = "keyboard_normal";

    } //End if
    else {
        keyboardstate.className = "keyboard";
    }
} //End Function
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1 回答 1

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浏览一下Chrome 控制台后发现：

  1. 您的代码中存在无效条件（函数commandHeld）
  2. 函数中还有一个错字regress（keyboardstate！=keyboardState）

工作代码：

function changeNameToLetters() {
    //keyboard container variables
    var keyboardState = document.getElementById("keyboardContainer");
    var currentClass = keyboardState.className;

    //h3 text variables
    var h3Text = document.getElementById("changeH3Text");
    var currentText = h3Text.innerHTML;

    if (currentClass == "keyboard_normal" && currentText == "Tool Name on Hover") {
        keyboardState.className = "keyboard";
        h3Text.innerHTML = "Regular Keyboard on Hover";
    } //end if
    else {
        keyboardState.className = "keyboard_normal";
        h3Text.innerHTML = "Tool Name on Hover";
    } //end else
} //End function

function commandHeld() {
    //keyboard container variables
    var keyboardState = document.getElementById("keyboardContainer");
    var currentClass = keyboardState.className;

    //h3 text variables
    var h3Text = document.getElementById("changeH3Text");
    var currentText = h3Text.innerHTML;

    if (currentClass == "keyboard_normal" || currentClass == "keyboard") {
        keyboardState.className = "keyboardCmd";

    } //End if
    else {
        regress('keyboardCmd');
    }

} //End function

function regress(pressed) {
    //keyboard container variables
    var keyboardState = document.getElementById("keyboardContainer");
    var currentClass = keyboardState.className;

    //h3 text variables
    var h3Text = document.getElementById("changeH3Text");
    var currentText = h3Text.innerHTML;

    if (currentText == "Tool Name on Hover" && currentClass == pressed) {

        keyboardState.className = "keyboard_normal";

    } //End if
    else {
        keyboardState.className = "keyboard";
    }
} //End Function

调试器是你的朋友:)

于 2013-09-23T16:05:35.533 回答