js神秘的表单提交动画效果

js 神秘的表单提交动画效果，即输入的详细信息和表单提交会消失在天空中。

最终实现的效果：

HTML 代码：

<div class="wrapper flex_box">
    <form>
        <div class="input">
            <label>
          name
        </label>
            <input class="name" placeholder="your name..." type="text">
        </div>
        <div class="input">
            <label>
          comment
        </label>
            <input class="comment" placeholder="enter whatever you feel like.." type="text">
        </div>
        <div class="button_wrapper">
            <button>
          submit
        </button>
        </div>
    </form>
</div>

<div class="cover"></div>

CSS 代码：

 @import url('https://fonts.googleapis.com/css2?family=Nunito:wght@300&display=swap');

* {
  box-sizing: border-box;
}

body {
  padding: 0;
  margin: 0;
  font-family: 'Nunito', sans-serif;
  background-color: #262527;
  overflow:hidden;
}

input, textarea, button {
  font-family: 'Nunito', sans-serif;
}

.wrapper {
  width: 100%;
  height: 100vh;
  color: #fae881;
  overflow:hidden;
}

.flex_box {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.box {
  position: absolute;
  background-color: black;
  width: 50px;
  height: 50px;
  transition: 0.2s;
}

form {
  position: absolute;
  padding: 30px 20px;
  width: 320px;
  border-radius: 7px;
  background-color: white;
  backdrop-filter: blur(5px);
  background-color: rgba(158, 189, 199, 0.288);
  overflow: hidden;
}

.input {
  display: flex;
  flex-direction: column;
}

input, textarea {
  padding: 8px 10px;
  margin: 3px 8px 16px 8px;
  background-color: rgba(222, 239, 248, 0.877);
  border: 0px transparent;
  border-radius: 5px;
  color:rgb(97, 4, 184);
  font-size: 16px;
  word-break: break-all; /* haven't found the best solution here yet, paragraphs are difficult to deal with */
  hyphens: auto;
  z-index: 1;
}

label {
  margin: 0 8px;
  font-size: 14px;
  color: white;
}

.button_wrapper {
  display: flex;
  justify-content: flex-end;
}

button {
  padding: 8px 14px;
  margin: 20px 8px 0 0;
  border-width: 0px;
  border-radius: 5px;
  color: white;
  background-color: #b69269;
  transition: 0.3s;
  z-index: 1;
}

button:hover {
  color: rgb(60, 35, 153);
  background-color: white;
}

.star {
  position: absolute;
  transition: 1s;
  overflow: hidden;
  opacity: 1;
  height: 15px;
  width: 15px;
  border-radius: 50%;
  z-index: -90;
}

.star svg {
  height: 100%;
  width: auto;
}

.star_inner {
  height: 15px;
}

.cover {
  position: fixed;
  top: 0px;
  left: 0px;
  pointer-events: none;
  height: 100vh;
  width: 100%;
  z-index: 999;
  overflow: hidden;
}

.ghost {
  position: absolute;
  padding: 8px 10px;
  border: 0px transparent;
  border-radius: 5px;
  z-index: 1;
  color:rgb(97, 4, 184);
  font-size: 16px;
  display: flex;
  flex-wrap: wrap;
}

.ghost > div {
  margin: 0;
  padding: 0;
  transition: 5s;
}

.blank {
  width: 4px;
}

form.fade {
  animation: fade forwards ease 5s;
}

@keyframes fade {
  0% {
    opacity: 1;
    transform: translate(0vw, 0) skew(0);
  }
  20% {
    opacity: 0.8;
    transform: translate(0vw, 0) skew(0);
  }

  100% {
    opacity: 0;
    transform: translate(50vw, -50vh) skew(-45deg);
  }
}

form.fade_in {
  animation: fade_in forwards ease 6s;
}

@keyframes fade_in {
  0% {
    opacity: 0;
    transform: translate(-50vw, 150vh) skew(-45deg);
  }
  50% {
    opacity: 0;
  }
  100% {
    opacity: 1;
    transform: translate(0) skew(0);
  }
}

::placeholder { /* Chrome, Firefox, Opera, Safari 10.1+ */
  color: rgb(140, 145, 216);
}

:-ms-input-placeholder { /* Internet Explorer 10-11 */
  color: rgb(140, 145, 216);
}

::-ms-input-placeholder { /* Microsoft Edge */
  color: rgb(140, 145, 216);
}

.sign {
  position: absolute;
  color: white;
  bottom: 10px;
  right: 10px;
  font-size: 10px;
}

a {
  color: white;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

JS 代码：

function init() {
  //animating form
  const button = document.querySelector('button')
  const name = document.querySelector('.name')
  const comment = document.querySelector('.comment')
  const cover = document.querySelector('.cover')
  const form = document.querySelector('form')
  let letterCount = 0

  const createGhostLetters = (text, className) =>{
    return text.split('').map( letter =>{
      return `
        <div class="${className} ${letter === ' ' ? ' blank' : ''}" >
          ${letter}
        </div>
      `
    }).join('')
  }

  const createGhostDiv = (target, className) =>{
    if (!target.value) return
    target.placeholder = ''
    const ghostDiv = document.createElement('div')
    const targetSpec = target.getBoundingClientRect()
    ghostDiv.classList.add('ghost')
    ghostDiv.innerHTML = createGhostLetters(target.value, className)

    ghostDiv.style.top = `${targetSpec.y}px`
    ghostDiv.style.left = `${targetSpec.x}px`
    ghostDiv.style.height = `${targetSpec.height}px`
    ghostDiv.style.width = `${targetSpec.width}px`

    cover.appendChild(ghostDiv)
    target.value = ''
  }

  const setupGhostLetterMotion = (target, className)=>{
    createGhostDiv(target, className)

    const letters = document.querySelectorAll(`.${className}`)
    letters.forEach((letter,i)=>{
      const letterSpec = letter.getBoundingClientRect()
      
      letter.style.top = `${letterSpec.y}px`
      letter.style.left = `${letterSpec.x}px`
      letter.style.color = 'white'
      letter.style.transition = '1s'

      setTimeout(()=>{   
        letter.style.position = 'fixed'
        letter.style.transition = '5s'
        letter.style.top = `-${window.innerHeight / 2}px`
        letter.style.left = `${letterSpec.x + window.innerWidth / 2}px`   
      },(letters.length - i) * 150)
    })
    letterCount = letterCount < letters.length ? letters.length : letterCount
  }


  const handleSubmit = e =>{
    e.preventDefault()
    form.classList.remove('fade_in')
    form.classList.add('fade')
    setupGhostLetterMotion(name,'name_letter')
    setupGhostLetterMotion(comment,'comment_letter')
  
    setTimeout(()=>{
      form.classList.remove('fade')
      form.classList.add('fade_in')
      name.placeholder = 'your name...?'
      comment.placeholder = 'enter whatever you feel like...'
      letterCount = 0
    },3000 + (letterCount * 100))
  }

  button.addEventListener('click', (e)=>handleSubmit(e))

  const starSvg = `
  <svg x="0px" y="0px" width="565.4px" height="51.4px" viewBox="0 0 565.4 51.4" >
    <style type="text/css">
    .st0{fill:#91a7b4;}
    .st1{fill:#b69269;}
    .st2{fill:#FFFFFF;}
    </style>
    <path class="st0" d="M559.7,28.5h-11.5v5.7h-5.7v0.1v17.1h-5.7V34.3v-0.1h-5.7v-5.7h-11.4v-5.7h11.4v-5.7h5.7V0h5.7v17.1h5.7v5.7
    h11.5V28.5z"/>
    <path class="st0" d="M445.5,28.7h-5.7v5.7h-5.7v-5.7h-5.7V23h5.7v-5.7h5.7V23h5.7V28.7z"/>
    <path class="st0" d="M496.9,28.6h-5.7V40h-5.7V28.6h-5.7v-5.7h5.7V11.5h5.7v11.4h5.7V28.6z"/>
    <path class="st1" d="M405.5,28.6H394v5.7h-5.7v0.1v17.1h-5.7V34.4v-0.1h-5.7v-5.7h-11.4v-5.7h11.4v-5.7h5.7V0.1h5.7v17.1h5.7v5.7
    h11.5V28.6z"/>
    <path class="st2" d="M148.5,28.5H137v5.7h-5.7v0.1v17.1h-5.7V34.3v-0.1h-5.7v-5.7h-11.4v-5.7h11.4v-5.7h5.7V0h5.7v17.1h5.7v5.7h11.5
    V28.5z"/>
    <path class="st2" d="M34.3,28.7h-5.7v5.7h-5.7v-5.7h-5.7V23h5.7v-5.7h5.7V23h5.7V28.7z"/>
    <path class="st2" d="M85.7,28.6H80V40h-5.7V28.6h-5.7v-5.7h5.7V11.5H80v11.4h5.7V28.6z"/>
    <path class="st1" d="M291.2,28.7h-5.7v11.4h-5.7V28.7h-5.7V23h5.7V11.6h5.7V23h5.7V28.7z"/>
    <path class="st1" d="M348.4,28.6h-5.7v5.7H337v11.5h-5.7V34.3h-5.7v-5.7h-5.7v-5.7h5.7v-5.7h5.7V5.8h5.7v11.4h5.7v5.7h5.7
    L348.4,28.6L348.4,28.6z"/>
    <g>
    <g id="XMLID_7_">
      <g>
        <rect x="177.1" y="22.9" class="st1" width="5.7" height="5.7"/>
      </g>
    </g>
    </g>
    <g>
    <g id="XMLID_6_">
      <g>
        <rect x="225.6" y="20" class="st1" width="11.5" height="11.4"/>
      </g>
    </g>
    </g>
  </svg>
  `

  const animationPatterns = [
    ['0','1'],['0','1'],['0','1'],['0','1'],['0','1'],
    ['1','1'],['1','1'],['1','1'],['1','1'],
    ['2','2'],['2','2'],
    ['0','2'],['0','2'],
    ['3','5'],['3','5'],
    ['8','9'],['8','9'],
    ['3','6'],['3','6'],
    ['9','10'],['9','10'],
    ['10','10'],['10','10'],
    ['3','7'],
    ['6','7']
  ]

  const wrapper = document.querySelector('.wrapper')
  const frameSize = 15


  //star blinking animation
  const animateStar = (target, start, end, speed) => {
    let i = start   
    setInterval(function () {
      target.style.margin = `0px ${-(i * frameSize)}px`
      if (i >= end) {
        i = start
      } else {
        i++
      }
    }, speed)
  }


  //position stars
  const stars = new Array(70).fill('')
  stars.forEach(()=>{
    const animationPattern = animationPatterns[Math.floor(Math.random() * animationPatterns.length)]
    const speed = Math.random() < 0.1 ?
      140
      :
      300
  
    const starDiv = document.createElement('div')
    starDiv.classList.add('star')
      
    const starInside = document.createElement('div')
    starInside.classList.add('star_inner')
    starInside.innerHTML = starSvg
    starInside.style.width = `${frameSize * 11}px`
  
    starDiv.appendChild(starInside)
    starDiv.style.top = `${Math.ceil(Math.random() * 100)}%`
    starDiv.style.left = `${Math.ceil(Math.random() * 100)}%`
    wrapper.appendChild(starDiv)
  
    animateStar(starInside, animationPattern[0], animationPattern[1], speed)
  })

}

window.addEventListener('DOMContentLoaded', init)

更多前端特效代码，请关注码云笔记技术博客，每日为你整理分享最好的前端知识。

以上关于js神秘的表单提交动画效果的文章就介绍到这了，更多相关内容请搜索码云笔记以前的文章或继续浏览下面的相关文章，希望大家以后多多支持码云笔记。