（Javascript）如何将子菜单按钮链接到某个功能？

问题描述 投票：1回答：2

我正在接近完成一个项目，但我不想尝试将按钮链接到我的功能。我成功编辑了菜单，但我需要按钮链接到我创建的功能。

例如，当我看着

<a href="#">Add a side to your Dice</a>
<a href="#">Remove a side to your Dice</a>
<a href="#">Add an additional Roll</a>

我如何添加功能以便他们实际执行某些操作？

onClick="promoteDice()
onClick="demoteDice()
onClick="addRoll()

标签也是如此：

  <a href="#roll">Roll</a>
  <a href="#exit">Exit</a>

我没有看到我应该添加功能，所以它的工作原理。

这是我的实际骰子游戏供参考我不需要你合并我的脚本我只需要帮助解决这个问题。

<!DOCTYPE html>
<html>
    <body>
    <input type="button" value="Roll The Dice" onClick="rollDice()" />
    <input type="button" value="Upgrade The Dice" onClick="upgradeDice()" />
    <input type="button" value="Quit" onClick="quit()" />
<script>    
var myscore = 0;
var housescore = 0;
var dicesides = 6;
var diceroll = 1

function rollDice() {
  var x = Math.floor(Math.random() * dicesides) + 1;
  var y = Math.floor(Math.random() * dicesides) + 1;

  var total = x + y;
  msg = "You rolled " + x + ", " + y + " = " + total + "\n";
    if (total != 11 && total < 7 && x != y) {
            housescore += 1;
      msg += "Even Up";
        } else if (total != 11 && total > 7 && x != y) {
            myscore += 1;
      msg += "Player Up";
        }
  if (total == 7 || total == 11) {
    housescore += 10;
    msg += "CRAPS";
  } else if (x == y) {
    if (x % 2 == 0) {
      myscore += 10;
      msg += "Even Up";
    } else {
      housescore += 10;
      msg += "Odd Ball";
    }
  }
    msg += " Your Score is " + "Player: " + myscore + ", House: " + housescore;
  alert(msg);
    didIwin();

}
function didIwin() {
    if (housescore >= 100) {
    alert ("Sorry the house won the game!");
    } else if (playerscore >= 100) {
    alert ("Congratulations you won the game!");
    }
    myscore = 0;
    housescore = 0;
    dicesides = 6;
}
function upgradeDice() {
    if (myscore >= 10) {
    dicesides += 1;
    alert ("Your Dice now have " + dicesides + " sides");
    } else {
difference = 10 - myscore;
alert ("You need "+difference+" more points");
    }
}
function quit() {
  alert (" Your Score is " + "Player: " + myscore + ", House: " + housescore);
    myscore = 0;
    housescore = 0;
    dicesides = 6;
    }




</script>
</body>
</html>

最后这里是我想要合并功能的菜单的代码：

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<style>
.navbar {
  overflow: hidden;
  background-color: #333;
  font-family: Arial, Helvetica, sans-serif;
}

.navbar a {
  float: left;
  font-size: 16px;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  cursor: pointer;
  font-size: 16px;  
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.navbar a:hover, .dropdown:hover .dropbtn, .dropbtn:focus {
  background-color: red;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  float: none;
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.dropdown-content a:hover {
  background-color: #ddd;
}

.show {
  display: block;
}
</style>
</head>
<body>

<div class="navbar">
  <a href="#roll">Roll</a>
  <a href="#exit">Exit</a>
  <div class="dropdown">
  <button class="dropbtn" onclick="myFunction()">Upgrade
    <i class="fa fa-caret-down"></i>
  </button>
  <div class="dropdown-content" id="myDropdown">
    <a href="#">Add a side to your Dice</a>
    <a href="#">Remove a side to your Dice</a>
    <a href="#">Add an additional Roll</a>
  </div>
  </div> 
</div>

<h3>Dropdown Menu inside a Navigation Bar</h3>
<p>Click on the "Dropdown" link to see the dropdown menu.</p>

<script>
/* When the user clicks on the button, 
toggle between hiding and showing the dropdown content */
function myFunction() {
  document.getElementById("myDropdown").classList.toggle("show");
}

// Close the dropdown if the user clicks outside of it
window.onclick = function(e) {
  if (!e.target.matches('.dropbtn')) {
  var myDropdown = document.getElementById("myDropdown");
    if (myDropdown.classList.contains('show')) {
      myDropdown.classList.remove('show');
    }
  }
}
</script>
</body>
</html>
javascript button nested submenu
2个回答
1
投票

您可以像以前在示例中那样添加函数，但是在子菜单或其他任何事情中并不重要。

只需将onclick属性和函数添加到要触发执行的HTML标记中，然后就可以了。

在我的示例中，我将函数myFunc();添加到dice子菜单的add侧，但是您可以向HTML标签的其余部分添加任何逻辑和任何其他内容，这只是一个示例。

作为旁注：函数myFunc();中的代码可以更改为任何内容。

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<style>
.navbar {
  overflow: hidden;
  background-color: #333;
  font-family: Arial, Helvetica, sans-serif;
}

.navbar a {
  float: left;
  font-size: 16px;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

.dropdown {
  float: left;
  overflow: hidden;
}

.dropdown .dropbtn {
  cursor: pointer;
  font-size: 16px;  
  border: none;
  outline: none;
  color: white;
  padding: 14px 16px;
  background-color: inherit;
  font-family: inherit;
  margin: 0;
}

.navbar a:hover, .dropdown:hover .dropbtn, .dropbtn:focus {
  background-color: red;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  float: none;
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  text-align: left;
}

.dropdown-content a:hover {
  background-color: #ddd;
}

.show {
  display: block;
}
</style>
</head>
<body>

<div class="navbar">
  <a href="#roll">Roll</a>
  <a href="#exit">Exit</a>
  <div class="dropdown">
  <button class="dropbtn" onclick="myFunction()">Upgrade
    <i class="fa fa-caret-down"></i>
  </button>
  <div class="dropdown-content" id="myDropdown">
    <a href="#" onclick="myFunc();">Add a side to your Dice</a>
    <a href="#">Remove a side to your Dice</a>
    <a href="#">Add an additional Roll</a>
  </div>
  </div> 
</div>

<h3>Dropdown Menu inside a Navigation Bar</h3>
<p>Click on the "Dropdown" link to see the dropdown menu.</p>

<script>

function myFunc() {
  alert('You clicked a submenu item')
}
/* When the user clicks on the button, 
toggle between hiding and showing the dropdown content */
function myFunction() {
  document.getElementById("myDropdown").classList.toggle("show");
}

// Close the dropdown if the user clicks outside of it
window.onclick = function(e) {
  if (!e.target.matches('.dropbtn')) {
  var myDropdown = document.getElementById("myDropdown");
    if (myDropdown.classList.contains('show')) {
      myDropdown.classList.remove('show');
    }
  }
}
</script>
</body>
</html>
0
投票

您只需将onclick添加到链接中，如下所示：

<a href="#" onclick="promoteDice()">Add a side to your Dice</a>
<a href="#" onclick="demoteDice()">Remove a side to your Dice</a>
<a href="#" onclick="addRoll()">Add an additional Roll</a>

您可能还想使用<button type="button" onclick="addRoll()">Add Roll</button>，因为<a>标记只应在链接到某些内容时使用。

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