協助在BorderJS內部組織用戶輸入-有解無憂

我目前正在使用 HTML、CSS 和 JS 創建一個待辦事項串列程式。我的程式當前存在的問題之一是，當您選擇運行程式時，添加到串列中的專案會部分阻止程式內部的添加按鈕。另一個問題是，當您輸入 clear 以洗掉所有添加的專案時，清除按鈕無法正常作業。所以我想知道如何解決這些問題，其中添加的專案部分阻止了添加和清除按鈕。以及如何讓清除按鈕正常作業以清除待辦事項串列中添加的專案串列。

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {
  margin: 0;
  min-width: 250px;
}


  #todo{
float:left;
width:50%;

}

#done{
float:right;
width:50%;
}


/* Include the padding and border in an element's total width and height */
//* {
//  box-sizing: border-box;
//}

/* Remove margins and padding from the list */
ul {
  margin: 0;
  padding: 0;
}

/* Style the list items */
ul li {
  cursor: pointer;
  position: relative;
  padding: 12px 8px 12px 40px;
  list-style-type: none;
  background: #eee;
  font-size: 18px;
  transition: 0.2s;
  
  /* make the list items unselectable */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Set all odd list items to a different color (zebra-stripes) */
ul li:nth-child(odd) {
  background: #f9f9f9;
}

/* Darker background-color on hover */
ul li:hover {
  background: #ddd;
}

/* When clicked on, add a background color and strike out text */
ul li.checked {
  background: #888;
  color: #fff;
  text-decoration: line-through;
}

/* Add a "checked" mark when clicked on */
ul li.checked::before {
  content: '';
  position: absolute;
  border-color: #fff;
  border-style: solid;
  border-width: 0 2px 2px 0;
  top: 10px;
  left: 16px;
  transform: rotate(45deg);
  height: 15px;
  width: 7px;
}

/* Style the close button */
.close {
  position: absolute;
  right: 0;
  top: 0;
  padding: 12px 16px 12px 16px;
}

.close:hover {
  background-color: #f44336;
  color: white;
}

/* Style the header */
.header {
  background-color: #f44336;
  padding: 30px 40px;
  color: white;
  text-align: center;
}

/* Clear floats after the header */
.header:after {
  content: "";
  display: table;
  clear: both;
}

/* Style the input */
input {
  margin: 0;
  border: none;
  border-radius: 0;
  width: 75%;
  padding: 10px;
  float: left;
  font-size: 16px;
}

/* Style the "Add" button */
.addBtn {
  padding: 10px;
  width: 25%;
  background: #d9d9d9;
  color: #555;
  float: left;
  text-align: center;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
  border-radius: 0;
}

.Clear {
  padding: 10px;
  width: 25%;
  background: #d9d9d9;
  color: #555;
  float: left;
  text-align: center;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
  border-radius: 0;
}

.Clear:hover {
  background-color: #bbb;
}

.addBtn:hover {
  background-color: #bbb;
}

h1 {
font-size: 30px;
border: 1px solid black;
margin: auto;  
padding: 30px;
text-align: center;

}

h2 {
font-size: 30px;
border: 1px solid black;
margin: auto;  
padding: 30px;
text-align: center;
}
</style>
</head>
<body>


<form id="todo" style="float:left">
    <h1 id="todo" style="font-family:Helvetica; color:#006600"><b>To Do</b>   
    <input type="text" id="myInput" placeholder="Add Item">
  <span onclick="newElement()" class="addBtn">Add</span>
  <input type="button" onclick="newFunction()" value="Clear">
  <ul id="myUL">

</ul>

  
  </h1>

    </form>
    <form id="done" style="float:right">
    <h2 id="done" style="font-family:Helvetica; color:#006600"><b>Done</b></h2>
 
    </form>



<script>
// Create a "close" button and append it to each list item
var myNodelist = document.getElementsByTagName("LI");
var i;
for (i = 0; i < myNodelist.length; i  ) {
  var span = document.createElement("SPAN");
  var txt = document.createTextNode("\u00D7");
  span.className = "close";
  span.appendChild(txt);
  myNodelist[i].appendChild(span);
}

// Click on a close button to hide the current list item
var close = document.getElementsByClassName("close");
var i;
for (i = 0; i < close.length; i  ) {
  close[i].onclick = function() {
    var div = this.parentElement;
    div.style.display = "none";
  }
}

// Add a "checked" symbol when clicking on a list item
var list = document.querySelector('ul');
list.addEventListener('click', function(ev) {
  if (ev.target.tagName === 'LI') {
    ev.target.classList.toggle('checked');
  }
}, false);

// Create a new list item when clicking on the "Add" button
function newElement() {
  var li = document.createElement("li");
  var inputValue = document.getElementById("myInput").value;
  var t = document.createTextNode(inputValue);
  li.appendChild(t);
  if (inputValue === '') {
    alert("You must write something!");
  } else {
    document.getElementById("myUL").appendChild(li);
  }
  document.getElementById("myInput").value = "";

  var span = document.createElement("SPAN");
  var txt = document.createTextNode("\u00D7");
  span.className = "close";
  span.appendChild(txt);
  li.appendChild(span);

  for (i = 0; i < close.length; i  ) {
    close[i].onclick = function() {
      var div = this.parentElement;
      div.style.display = "none";
    }
  }
}

function newFunction() {
            document.getElementById("todo").reset();
         }

</script>

</body>
</html>

uj5u.com熱心網友回復：

它是position: absolutecss 中的。

當您使用此屬性時，元素將在頁面中“浮動”。

您應該使用絕對值洗掉所有屬性。

無需在您的頁面中使用它們。

我也推薦這兩篇關于 position 和 flexbox 的文章：

https://www.w3schools.com/css/css_positioning.asp

https://www.w3schools.com/css/css3_flexbox.asp

轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/348809.html

標籤：javascript html css

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