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在布局上鏈接Javascript函數,該布局是從Rails中的ruby資產管道加載的?

[英]Linking a Javascript function on a layout that is loaded from the asset pipeline in ruby on rails?

當檢查時從靜態頁面布局中的資產管道加載的javascript文件(app / assets / javacripts / bootstrap.js)鏈接函數時,我得到:未捕獲的ReferenceError:未定義myFunction。 我已經搜索了幾個小時,並且沒有使用ruby內部的Coffeescript或Jquery或方法,我只是想將此函數從我的.js文件鏈接到視圖中的布局中。 任何具體的解釋,或者您是否可以將我鏈接到有關如何執行此操作的任何資源...,或者是旨在將Javascript快速鏈接到視圖而不會打擾管道的教程,這些都是很好的。 先感謝您。

這是Javascript函數:

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

  // Close the dropdown menu if the user clicks outside of it
  window.onclick = function(event) {
    if (!event.target.matches('.dropbtn')) {

      var dropdowns = document.getElementsByClassName("dropdown-content");
      var i;
      for (i=0; i < dropdowns.length; i++) {
        var openDropdown = dropdowns[i];
        if (openDropdown.classList.contains('show')) {
          openDropdown.classList.remove('show');
        }
      }
    }
  }

這是對應的CSS:

/* Dropdown Button */
.dropbtn {
  background-color: #4CAF50;
  color: white;
  padding: 16px;
  font-size: 16px;
  border: none;
  cursor: pointer;
}

/* Dropdown button on hover & focus */
.dropbtn:hover, .dropbtn:focus {
  background-color: #3e8e41;
}

/* The container <div> - needed to position the dropdown content */
.dropdown {
  position: relative;
  display: inline-block;
}

/* Dropdown content (Hidden by Default) */
.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

/* Links inside the dropdown */
.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

/* Change color of dropdown links on hover */
.dropdown-content a:hover {background-color: #f1f1f1}

/* Show the dropdown menu (use JS to add this class to the .dropdown-    content container when the user clicks on the dropdown button) */
.show {display:block;}

這是我的html:

                <li>
                    <div class="dropdown">
                        <button onclick="myFunction()" class="dropbtn">Dropdown</button>
                        <div id="myDropdown" class="dropdown-content">
                            <a href="#work_places">Work Places</a>
                            <a href="#living_places">Living Places</a>
                            <a href="#learning_places">Learning Places</a>
                            <a href="#interiors">Interiors</a>
                            <a href="#miscellaneous">Miscellaneous</a>
                        </div>
                    </div>
                </li>

嘗試以這種方式定義函數,以(希望)使其在您的視圖中全局且可訪問:

this.myFunction = function() {
  document.getElementById('myDropdown').classList.toggle('show');
};

否則,您可以從視圖中刪除onclick並將其附加到javascript文件中:

document.getElementsByClassName('dropbtn')[0].onclick = function() {
  document.getElementById('myDropdown').classList.toggle('show');
};

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