javascript - 如何让我的模糊动画每次都运行得更快？

Question

我尝试模糊所有页面并在单击按钮时显示“弹出窗体”，这确实有效，但第一次单击时动画非常慢，因此我尝试找到任何解决方案来解决此问题

我在本地 wamp 服务器上运行它，我尝试了很多浏览器，每次第一次点击似乎都很慢，我什至尝试在线上传网站，结果是一样的。

var vid = document.getElementById("bgvid");
vid.volume = 0.01;
var x = document.getElementById("formregister");
var container = document.getElementById('container');
var top_vid =
document.getElementById('top_vid')

function hideShow()
{
  if(x.style.display === "none")
  {
    x.style.display = "block";
    vid.classList.remove('noblur');
    top_vid.classList.remove('noblur');
    vid.className += " blur";
    top_vid.className += " blur";
  }
  else
  {
    x.style.display = "none";
    vid.className += " noblur";
    top_vid.className += " noblur";
    vid.classList.remove('blur');
    top_vid.classList.remove('blur');
  }
}

@import url('https://fonts.googleapis.com/css?family=Montserrat&display=swap');
body{
  font-family: 'Montserrat', sans-serif;
  background-color: black;
}

.bg,
.bg-filter{
  position: fixed;
  top: 0;
  left: 0;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  z-index: -100;
 }

.bg-filter{
  z-index:-99;
  opacity:0.2;
  background: -webkit-linear-gradient(rgba(49,224,247,1) 0%, rgba(90,77,184,1) 100%);
  background: -moz-linear-gradient(rgba(49,224,247,1) 0%, rgba(90,77,184,1) 100%);
  background: -o-linear-gradient(rgba(49,224,247,1) 0%, rgba(90,77,184,1) 100%);
  background: linear-gradient(rgba(49,224,247,1) 0%, rgba(90,77,184,1) 100%);
}

.top_vid{
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}

.top_vid .title{
  font-family: 'Montserrat', sans-serif;
  margin-left: 3%;
  font-size:3.2em;
  color:#fff;
}

.start {
  overflow: hidden;
  font-family: 'Montserrat', sans-serif;
  border-radius: 4px;
  background-color: transparent;
  border: none;
  color: #FFFFFF;
  text-align: center;
  font-size: 28px;
  cursor: pointer;
  margin-right: 3%;
}
.start:focus{
  outline:none;
}
.start span {
  cursor: pointer;
  position: relative;
  transition: 0.5s;

}
.start span:after {
  color: #31E0F7;
  content: '\00bb';
  position: absolute;
  opacity: 0;
  top: 0;
  right: -20px;
  transition: 0.5s;
}
.start:hover span {
  padding-right: 25px;
}
.start:hover span:after {
  opacity: 1;
  right: 0;
}
.registerform{
  align-items: center;
}
form {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.blur {
  -webkit-filter: blur(5px);
  -moz-filter: blur(5px);
  -ms-filter: blur(5px);
  -o-filter: blur(5px);
  filter: blur(5px);
  -webkit-transition: all 0.25s ease-in;
  transition: all 0.25s ease-in;
}
.noblur {
  -webkit-filter: blur(0px);
  -moz-filter: blur(0px);
  -ms-filter: blur(0px);
  -o-filter: blur(0px);
  filter: blur(0px);
  -webkit-transition: all 0.25s ease-out;
  transition: all 0.25s ease-out;
}

  <div id="container">

    <video autoplay loop poster class="bg" id="bgvid">
      <source src="videos/theforcebg5.mp4" type="video/mp4"></source>
    </video>

    <div class="bg-filter" id="bg-filter"></div>

    <div class="top_vid" id="top_vid">
      <h1 class="title">Moodyness</h1>
      <button class="start" onclick="hideShow()"><span>Let's move !</span></button>
    </div>

  </div>

  <div class="registerform" id="formregister" style="display: none;">

    <form action="#" method="post">
      <input type="email" placeholder="EMAIL" required></input>
      <input type="password" placeholder="PASSWORD" required></input>
      <input type="password" placeholder="REPEAT PASSWORD" required></input>

      <div class="check">
        <label for="checkbox">Acceptez vous les conditions d'utilisation ?</label>
        <input type="checkbox" id="checkbox" required></input>
      </div>

      <input type="submit" value="Okay !"></input>
    </form>

  </div>

完整代码在这里https://codepen.io/anon/pen/pmWwxm

我希望即使在我们第一次启动网站时动画也能很快，谢谢!

Answer 1

这实际上与 JavaScript 或 HTML 没有太多关系。这是一个处理模糊动画时间的 CSS 属性(或 transition )。

你可以在这四行中处理转换的时间:

.blur {
  -webkit-filter: blur(5px);
  -moz-filter: blur(5px);
  -ms-filter: blur(5px);
  -o-filter: blur(5px);
  filter: blur(5px);
  -webkit-transition: all 0.1s ease-in; //HERE
  transition: all 0.1s ease-in; //HERE
}
.noblur {
  -webkit-filter: blur(0px);
  -moz-filter: blur(0px);
  -ms-filter: blur(0px);
  -o-filter: blur(0px);
  filter: blur(0px);
  -webkit-transition: all 0.1s ease-out; //HERE
  transition: all 0.1s ease-out; //HERE
}

你有以下值(value)观:

transition: all 0.5s ease-out;

因此将它更改为较小的值，如 0.1s 将使转换更快。这就是为什么您的过渡始终保持相同速度的原因，因为 transition CSS 属性处理当前元素样式到下一个样式之间的时间。

示例:将 blur(5px) 作为当前值，当您将元素样式更改为 blur(0px) 并且 transition 属性存在于元素上，CSS 将计算在指定时间内需要将当前值减少多少 5s 所以在这段时间结束时，最终值将是 blur(0px)。这模拟了模糊动画消失。

看看这里，这样您就可以看到它在工作:

var vid = document.getElementById("bgvid");
vid.volume = 0.01;
var x = document.getElementById("formregister");
var container = document.getElementById('container');
var top_vid =
document.getElementById('top_vid')

function hideShow()
{
  if(x.style.display === "none")
  {
    x.style.display = "block";
    vid.classList.remove('noblur');
    top_vid.classList.remove('noblur');
    vid.className += " blur";
    top_vid.className += " blur";
  }
  else
  {
    x.style.display = "none";
    vid.className += " noblur";
    top_vid.className += " noblur";
    vid.classList.remove('blur');
    top_vid.classList.remove('blur');
  }
}

@import url('https://fonts.googleapis.com/css?family=Montserrat&display=swap');
body{
  font-family: 'Montserrat', sans-serif;
  background-color: black;
}

.bg,
.bg-filter{
  position: fixed;
  top: 0;
  left: 0;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  z-index: -100;
 }

.bg-filter{
  z-index:-99;
  opacity:0.2;
  background: -webkit-linear-gradient(rgba(49,224,247,1) 0%, rgba(90,77,184,1) 100%);
  background: -moz-linear-gradient(rgba(49,224,247,1) 0%, rgba(90,77,184,1) 100%);
  background: -o-linear-gradient(rgba(49,224,247,1) 0%, rgba(90,77,184,1) 100%);
  background: linear-gradient(rgba(49,224,247,1) 0%, rgba(90,77,184,1) 100%);
}

.top_vid{
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}

.top_vid .title{
  font-family: 'Montserrat', sans-serif;
  margin-left: 3%;
  font-size:3.2em;
  color:#fff;
}

.start {
  overflow: hidden;
  font-family: 'Montserrat', sans-serif;
  border-radius: 4px;
  background-color: transparent;
  border: none;
  color: #FFFFFF;
  text-align: center;
  font-size: 28px;
  cursor: pointer;
  margin-right: 3%;
}
.start:focus{
  outline:none;
}
.start span {
  cursor: pointer;
  position: relative;
  transition: 0.1s;

}
.start span:after {
  color: #31E0F7;
  content: '\00bb';
  position: absolute;
  opacity: 0;
  top: 0;
  right: -20px;
  transition: 0.1s;
}
.start:hover span {
  padding-right: 25px;
}
.start:hover span:after {
  opacity: 1;
  right: 0;
}
.registerform{
  align-items: center;
}
form {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.blur {
  -webkit-filter: blur(5px);
  -moz-filter: blur(5px);
  -ms-filter: blur(5px);
  -o-filter: blur(5px);
  filter: blur(5px);
  -webkit-transition: all 0.1s ease-in;
  transition: all 0.1s ease-in;
}
.noblur {
  -webkit-filter: blur(0px);
  -moz-filter: blur(0px);
  -ms-filter: blur(0px);
  -o-filter: blur(0px);
  filter: blur(0px);
  -webkit-transition: all 0.1s ease-out;
  transition: all 0.1s ease-out;
}

<div id="container">

    <video autoplay loop poster class="bg" id="bgvid">
      <source src="videos/theforcebg5.mp4" type="video/mp4"></source>
    </video>

    <div class="bg-filter" id="bg-filter"></div>

    <div class="top_vid" id="top_vid">
      <h1 class="title">Moodyness</h1>
      <button class="start" onclick="hideShow()"><span>Let's move !</span></button>
    </div>

  </div>

  <div class="registerform" id="formregister" style="display: none;">

    <form action="#" method="post">
      <input type="email" placeholder="EMAIL" required></input>
      <input type="password" placeholder="PASSWORD" required></input>
      <input type="password" placeholder="REPEAT PASSWORD" required></input>

      <div class="check">
        <label for="checkbox">Acceptez vous les conditions d'utilisation ?</label>
        <input type="checkbox" id="checkbox" required></input>
      </div>

      <input type="submit" value="Okay !"></input>
    </form>

  </div>