尝试淡入元素时，setTimeout不起作用

Question

我正在呼叫tooltip，并试图在9秒后将其隐藏，但是它对我不起作用。

这里发生的是，“工具提示” 仅在加载后被隐藏，但是第二次单击“ Touch Me”按钮时却没有响应。
“触摸我”按钮为#pop-regalo

我的脚本在做什么错？
您可以在下面找到一个演示：

$(function() {
  $('#pop-regalo').hide();
  setTimeout(function() {
    $('#pop-regalo').fadeIn('slow');
  }, 1000);
});

//--------------------

$(document).ready(function() {
  $("#pop-regalo").click(function() {
    $("#hola,.layer-2,.tooltip").show();
  });
  $("#hola").click(function() {
    $("#hola,.layer-2").hide();
  });
});

// --------------------

$(function() {
  $('.tooltip');
  setTimeout(function() {
    $('.tooltip').fadeOut('slow');
  }, 9000);
});

html,
body {
  left: 0;
  top: 0;
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif
}

.note {
  width: 50%;
  margin: 70px auto 0
}

#pop-regalo {
  position: fixed;
  left: 15px;
  top: 15px;
  padding: 10px 15px;
  color: white;
  background: red;
  cursor: pointer
}

#hola {
  display: none;
  position: absolute;
  width: 200px;
  height: 200px;
  padding: 15px 15px 8px;
  text-align: center;
  font-size: 2em;
  line-height: 200px;
  background: #999;
  -webkit-animation: fadein 1s;
  animation: fadein .75s;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  text-align: center;
  border-radius: 5px;
  -webkit-box-shadow: 0 3px 8px rgba(0, 0, 0, 0.7);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.7);
  z-index: 9999
}

@keyframes fadein {
  0% {
    opacity: 0
  }
  50% {
    opacity: 0
  }
  75% {
    opacity: 0
  }
  100% {
    opacity: 1
  }
}

@-webkit-keyframes fadein {
  0% {
    opacity: 0
  }
  50% {
    opacity: 0
  }
  75% {
    opacity: 0
  }
  100% {
    opacity: 1
  }
}

.layer-2 {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  -webkit-animation: fadein .2s;
  animation: fadein .2s;
  z-index: 999
}

.tooltip {
  display: none;
  position: fixed;
  top: 140px;
  left: 100%;
  margin-left: -80px
}

.tooltip .tooltiptext {
  width: 120px;
  background: #000;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 8px 12px;
  position: absolute;
  z-index: 1;
  top: -5px;
  right: 110%;
}

.tooltip .tooltiptext::after {
  content: "";
  position: absolute;
  top: 30%;
  left: 100%;
  margin-top: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: transparent transparent transparent #000
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="pop-regalo">Touch Me
  <!--<img src="https://i.pinimg.com/originals/3b/4f/ff/3b4fff9dfb958a180863c56d7fcf6326.jpg">-->
</div>

<div class="note">What is happening here that the "tooltip" is only hidden after loading, but it does not respond the second time we click on the red button named Touch Me...?</div>

<div id="hola">Close</div>

<div class="tooltip">
  <span class="tooltiptext">A gift for you</span>
</div>

<div class="layer-2"></div>

Answer 1

显示工具提示时，您必须触发超时。在您的原始代码中，您只会在页面加载时触发超时，因此，如果在9秒过去后第一次单击红色按钮，则即使在第一次迭代时，工具提示也不会隐藏。

您可能还希望将对超时实例的引用保存到变量中，并在触发新实例之前取消该实例，以使在关闭叠加层并再次单击按钮时，工具提示不会太早被隐藏。工具提示仍在显示。

var tooltipTimeout;

$(function(){
    $('#pop-regalo').hide();
    setTimeout(function(){
        $('#pop-regalo').fadeIn('slow');
    },1000);
});

//--------------------

$(document).ready(function(){
  $("#pop-regalo").click(function(){
    $("#hola,.layer-2,.tooltip").show();
    // clear any old timeout
    window.clearTimeout(tooltipTimeout);
    // you have to start the timeout after showing the tooltip
    tooltipTimeout = setTimeout(function(){
        $('.tooltip').fadeOut('slow');
    },9000);
  });
    $("#hola").click(function(){
      $("#hola,.layer-2").hide();
  });
});

// --------------------

$(function(){
    // the code in here is only called once at page load
    // $('.tooltip'); // <= this doesn't do anything
    // setTimeout(function(){
    //     $('.tooltip').fadeOut('slow');
    // },9000);
});

html,body {left:0;top:0;margin:0;padding:0;font-family:Arial,sans-serif}

.note {width:50%;margin:70px auto 0}

#pop-regalo {
  position:fixed;
  left:15px;
  top:15px;
  padding:10px 15px;
  color:white;
  background:red;
  cursor:pointer
}

#hola {
    display:none;
    position:absolute;
    width:200px;
    height:200px;
    padding:15px 15px 8px;
    text-align:center;
    font-size:2em;
    line-height:200px;
    background:#999;
    -webkit-animation:fadein 1s;
    animation:fadein .75s;
    top:50%;
    left:50%;
    transform:translate(-50%,-50%);
    background:#fff;
    text-align:center;
    border-radius:5px;
    -webkit-box-shadow:0 3px 8px rgba(0,0,0,0.7);
    box-shadow:0 3px 8px rgba(0,0,0,0.7);
    z-index:9999
}

@keyframes fadein{0%{opacity:0}50%{opacity:0}75%{opacity:0}100%{opacity:1}}
@-webkit-keyframes fadein{0%{opacity:0}50%{opacity:0}75%{opacity:0}100%{opacity:1}}

.layer-2 {
    display:none;
    position:absolute;
    top:0;
    left:0;
    width:100vw;
    height:100vh;
    background:rgba(0,0,0,0.5);
    -webkit-animation:fadein .2s;
    animation:fadein .2s;
    z-index:999
}

.tooltip {
  display:none;
  position: fixed;
  top:140px;
  left:100%;
  margin-left:-80px
}

.tooltip .tooltiptext {
  width: 120px;
  background:#000;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 8px 12px;
  position: absolute;
  z-index: 1;
  top: -5px;
  right: 110%;
}

.tooltip .tooltiptext::after {
  content: "";
  position: absolute;
  top: 30%;
  left: 100%;
  margin-top: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: transparent transparent transparent #000
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="pop-regalo">Touch Me
<!--<img src="https://i.pinimg.com/originals/3b/4f/ff/3b4fff9dfb958a180863c56d7fcf6326.jpg">-->
</div>

<div class="note">The tooltip will show upon button click and then hide after 9 seconds.</div>

<div id="hola">Close</div>

<div class="tooltip">
  <span class="tooltiptext">A gift for you</span>
</div>

<div class="layer-2"></div>