使用javascript定义关闭按钮

Question

我正在制作一个定制的待办事项列表，除了列表关闭按钮之外，一切都还可以，这不起作用你能给我一个解决方案吗？ 我拿了一个关闭按钮的源代码，如果你知道更简单的方法，请告诉我......我不明白这个关闭按钮的源代码，也不知道如何解决这个问题。

这是js代码：

 let submit = document.getElementsByClassName('addbutton')[0]; let ul = document.getElementsByTagName('ul')[0]; let display = document.getElementById('db'); let li = document.createElement('li'); li.innerHTML = '<input type ="submit" value="&#215" class ="unicodes" /> ' + display; submit.addEventListener('click', function Addlist() { ul.innerHTML += '<li class="list_style">' + '<input type ="submit" value="&#215" class ="unicodes" />' + display.value + '</li>'; }); // here is the close button source code var close = document.getElementsByClassName("unicodes"); var i; for (i = 0; i < close.length; i++) { close[i].onclick = function() { var div = this.parentElement; div.style.display = "none"; } }

 * { padding: 0; margin: 0; } body { background-image: url('wallpaper.jpg'); background-size: cover; background-repeat: no-repeat; } header h1 { color: white; font-size: 2em; padding: 30px; font-family: Verdana, Geneva, Tahoma, sans-serif; } .main-sec { background-color: rgba(255, 0, 0, 0.521); width: 495px; height: 632px; border-radius: 25px; margin-left: 100px; } .logo { width: 50px; height: 50px; padding: 16px 0 0 16px; } .logo:hover { opacity: 0.7; transition: 1s; transform: rotate(360deg) } .frame { float: right; width: 465px; height: 624px; margin: -8px 15px 15px 15px; border-radius: 25px; border: 1px solid rgb(0, 0, 0); } .add_todo { width: 254px; height: 41px; background-color: white; border-radius: 0 7px 7px 0; outline: none; border: none; margin-right: 12%; padding: 0 10px; text-align: left; font-size: 1em; } .addbutton { float: left; font-size: 1.2em; padding: 0px 5px; margin-left: 51.5px; margin-top: -0.1px; height: 42.5px; } .addbutton:hover { transition: 1s; background-color: rgb(0, 0, 0); color: rgb(255, 0, 0); } .list_style { width: 254px; height: 33px; background-color: white; border-radius: 7px; outline: none; border: none; margin-right: 12%; padding: 0 10px; text-align: center; margin-top: 12px; list-style: none; font-size: 1.2em; padding-top: 9px; } .unicodes { float: left; height: 42px; width: 42px; margin: -9px; border-radius: 7px; border: none; font-size: 1.5em; } .unicodes:hover { background-color: rgb(165, 165, 165); color: red; transition: 1s; }

 <header> <h1> To Do list : </h1> </header> <section class="main-sec"> <fieldset class="frame" dir="rtl"> <legend> <img src="konoha.png" class="logo"> </legend> <button class="addbutton"> AddTitle </button> <input type="text" class="add_todo" id="db" /> <ul> <li class="list_style"> <input type="submit" value="&#215" class="unicodes" /> Test the Front </li> </ul> </fieldset> </section>

Answer 1

我不太确定问题是什么，但我只是去给 html 元素的remove函数和..它应该工作..告诉我会发生什么;-;

let submit = document.getElementsByClassName('addbutton')[0];
let ul = document.getElementsByTagName('ul')[0];
let display = document.getElementById('db');
let li = document.createElement('li');
li.innerHTML = '<input type ="submit" value="&#215" class ="unicodes" /> ' + display;
submit.addEventListener('click', function Addlist() {
  ul.innerHTML += '<li class="list_style">' + '<input type ="submit" value="&#215" class ="unicodes" />' + display.value + '</li>';
});

// here is the close button source code
var close = document.getElementsByClassName("unicodes");
var i;
for (i = 0; i < close.length; i++) {
  close[i].onclick = function() { //CHANGE MADE(below)
    close[i].remove() //button should disappear when clicked.. not sure if that's what you want
  } //CHANGE MADE(above)

}

Answer 2

您没有为新创建的元素绑定关闭操作。 将关闭功能移动到一个函数并在创建（或）调用关闭功能作为 onclick 属性后调用它。 像下面这样替换 js 代码，它应该可以工作。

let submit = document.getElementsByClassName('addbutton')[0];
let ul = document.getElementsByTagName('ul')[0];
let display = document.getElementById('db');
let li = document.createElement('li');
li.innerHTML = '<input type ="submit" value="&#215" class ="unicodes" /> ' + display;
submit.addEventListener('click', function Addlist() {
  ul.innerHTML += '<li class="list_style">' + '<input type ="submit" value="&#215" class ="unicodes" />' + display.value + '</li>';
closeEventBinding();
});

// here is the close button source code
function closeEventBinding(){
var close = document.getElementsByClassName("unicodes");
var i;
for (i = 0; i < close.length; i++) {
  close[i].onclick = function() {
    var div = this.parentElement;
    div.style.display = "none";
  }

}
}

Answer 3

关闭按钮代码只在脚本加载后发生，并且只覆盖现有的待办事项（在这种情况下只有一个）。

每次创建关闭按钮操作时，您都需要定义关闭按钮操作。

---

let submit = document.getElementsByClassName('addbutton')[0];
let ul = document.getElementsByTagName('ul')[0];
let display = document.getElementById('db');
// let li = document.createElement('li');
// li.innerHTML = '<input type ="submit" value="&#215" class ="unicodes" /> ' + display;
submit.addEventListener('click', function Addlist() {
  // NOTICE: to each button add the onclick event 
  ul.innerHTML += `<li class="list_style">
                    <input type="submit" value="&#215" onclick="this.parentElement.style.display='none'" class="unicodes" />${display.value}
                   </li>`;
});

// here is the close button source code
// var close = document.getElementsByClassName("unicodes");
// var i;
// for (i = 0; i < close.length; i++) {
//   close[i].onclick = function() {
//     var div = this.parentElement;
//     div.style.display = "none";
//   }

// }

Answer 4

如果你想删除你的待办事项列表，你可以通过调用一个函数来使用触发器来删除待办事项列表。

// Add TODO
let submit = document.getElementsByClassName('addbutton')[0];
let ul = document.getElementsByTagName('ul')[0];
let display = document.getElementById('db');
let li = document.createElement('li');

li.innerHTML = '<input type ="submit" value="&#215" class ="unicodes" /> ' + display;
// Trigger close in html
close()
submit.addEventListener('click', function() {
  ul.innerHTML += '<li class="list_style">' + '<input type ="submit" value="&#215" class ="unicodes" />' + display.value + '</li>';

  // Trigger close if todo has new element
  close()
});

// Delete TODO
function close() {
  // Find all element close
  let close = document.querySelectorAll(".unicodes");
  // Loop for all element
  close.forEach(element => {
    // If element has click
    element.addEventListener('click', function() {
      // get a parent and remove this
      element.parentElement.remove();
    });
  });
};