Javascript在输入字段上单击事件

Question

在项目列表上绑定点击事件，该框会一直消失。知道为什么click事件不能在item-list＆gt;上工作DIV。

想法是获取正在点击的文本（来自项目列表）并将其放在输入字段中？

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    $json =
    Array
    (
    [1] => b
    [1] => c
    [1] => d
    ) 

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(function() {
  $(".input-msg").focus(function() {
    $(".item-list").css('display', 'block');
    $(".item-list div").click(function() {
      var inputValue = $('.input-msg');
      var data = $(this).text();
      inputValue.val(data);
    });
  }).blur(function() {
    $(".item-list").css('display', 'none');
  });
})();

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.input-wrapper {
  width: 300px;
}

.item-list {
  display: none;
}

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Answer 1

我想我遇到了你的问题： -

1.删除blur代码。 （因为当从输入框中聚焦时它会立即隐藏div）

2.在click之外放置focus。 （只注册听众一次就足够了）

3.Inside click执行hide代码。 （如果你想在点击它的文本div之后隐藏div）

工作代码段： -

(function() {
  $(".input-msg").focus(function() {
    $(".item-list").css('display', 'block');
    
  });
  $(".item-list div").click(function() {
      var inputValue = $('.input-msg');
      var data = $(this).text();
      inputValue.val(data);
      $('.item-list').hide();
  });
})();
$(document).mouseup(function(e) {
  if (!$(e.target).is('.item-list') && !$(e.target).is('.input-msg')) {
    $('.item-list').hide(1000);
  }
});

.input-wrapper {
  width: 300px;
}

.item-list {
  display: none;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="input-wrapper">
  <input type="text" class="input-msg" placeholder="click me">
  <!-- input msg -->
  <div class="item-list">
    <div>This is item one</div>
    <div>This is item Two</div>
    <div>This is item Three</div>
    <div>This is item Four</div>
  </div>
</div><br>

Answer 2

项目列表消失，因为在输入框触发的blur事件中，列表被清除。我已经注释掉了隐藏列表的代码，并将其移动到项目列表click上。

我还从click处理程序中移动了列表blur处理程序。这样可以防止点击处理程序一次又一次地挂载。

(function() {
  $(".input-msg").focus(function() {
    $(".item-list").css('display', 'block');

  }).blur(function() {
 
    // THIS IS YOUR ISSUE.
    // We're going to move this line down to the 
    // `item-list` click handler.
    // $(".item-list").css('display', 'none');

  });

  // You want to register this listener once,
  // not every time user focuses on input box.
  $(".item-list div").click(function() {
    var inputValue = $('.input-msg');
    var data = $(this).text();
    inputValue.val(data);
  });

  $('.main-wrapper').children().not('.input-wrapper').click(function(){
    // Hide the item list on body click.
    // This was moved here from the `blur` handler above.
    $(".item-list").css('display', 'none');
  });

})();

.main-wrapper {
  float: left;
  width: 600px;
}
  
.other-wrapper {
 float: left;
 width: 300px;
}

.input-wrapper {
  float: left;
  width: 300px;
}

.item-list {
  display: none;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="main-wrapper">
<div class="input-wrapper">
  <input type="text" class="input-msg" placeholder="click me">
  <!-- input msg -->
  <div class="item-list">
    <div>This is item one</div>
    <div>This is item one</div>
    <div>This is item one</div>
    <div>This is item one</div>
  </div>
</div>
<div class="other-wrapper">Other stuff.</div>
<div>

Answer 3

看看这个。

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(function() {
  $(".item-list div").click(function() {
    var inputValue = $('.input-msg');
    var data = $(this).text();
    inputValue.val(data);
    $('.item-list').fadeOut('fast');
  });
  $(".input-msg").focus(function() {
    $(".item-list").fadeIn('fast');        
  })
  $(document).mouseup(function(e) {
    if (!$(e.target).is('.item-list') && !$(e.target).is('.input-msg')) {
      $('.item-list').fadeOut('fast');
    }
  });
})();

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.input-wrapper {
  width: 300px;
}

.item-list {
  display: none;
}

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<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="input-wrapper">
  <input type="text" class="input-msg" placeholder="click me">
  <!-- input msg -->
  <div class="item-list">
    <div>This is item one</div>
    <div>This is item two</div>
    <div>This is item three</div>
    <div>This is item four</div>
  </div>
</div>

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Answer 4

const input = $("input")
const itemList = $(".item-list")
const items = $(".item-list > div")
const overlay = $(".overlay")

addClickTo(input, () => display(itemList, overlay))
addClickTo(items, (e) => {
  const itemText = e.currentTarget.textContent
  setValueOf(input, itemText)
  dontDisplay(itemList, overlay)
})
addClickTo(overlay, () => dontDisplay(itemList, overlay))


// helpers
function dontDisplay(...elements) { elements.forEach((element) => element.style.display = "none") }
function display(...elements) { elements.forEach((element) => element.style.display = "block") }
function $(selector) {
  const matchedElements = document.querySelectorAll(selector)
  return matchedElements && matchedElements.length > 1
  ? matchedElements
  : matchedElements[0]
}
function addClickTo(elements, handler) {
  elements.forEach || (elements = [elements])
  elements.forEach((element) => element.addEventListener("click", handler))
}
function setValueOf(input, text) {
    input.value = text
}

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const input = $("input")
const itemList = $(".item-list")
const items = $(".item-list > div")
const overlay = $(".overlay")

addClickTo(input, () => display(itemList, overlay))
addClickTo(items, (e) => {
  const itemText = e.currentTarget.textContent
  setValueOf(input, itemText)
  dontDisplay(itemList, overlay)
})
addClickTo(overlay, () => dontDisplay(itemList, overlay))


// helpers
function dontDisplay(...elements) { elements.forEach((element) => element.style.display = "none") }
function display(...elements) { elements.forEach((element) => element.style.display = "block") }
function $(selector) {
  const matchedElements = document.querySelectorAll(selector)
  return matchedElements && matchedElements.length > 1
  ? matchedElements
  : matchedElements[0]
}
function addClickTo(elements, handler) {
  elements.forEach || (elements = [elements])
  elements.forEach((element) => element.addEventListener("click", handler))
}
function setValueOf(input, text) {
	input.value = text
}

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.item-list {
  display: none;
  position: relative;
  cursor: pointer;
}

input {
  position: relative;
}

.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

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<div class="input-wrapper">
  <div class="overlay"></div>
  <input type="text" class="input-msg" placeholder="click me">

  <!-- input msg -->
  <div class="item-list">
    <div>This is item one</div>
    <div>This is item two</div>
    <div>This is item three</div>
    <div>This is item four</div>
  </div>
</div>

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https://jsfiddle.net/dvekrebv/6/