css 一支笔由seth kontny。

Posted 2021-05-13

Type Carousel for Libraries
---------------------------
A type carousel perfect for a value prop! 

See http://schier.co/post/simple-vanilla-javascript-typing-carousel

Forking @tylersnyder

A [Pen](http://codepen.io/sethkontny/pen/HqlLD) by [seth kontny](http://codepen.io/sethkontny) on [CodePen](http://codepen.io/).

[License](http://codepen.io/sethkontny/pen/HqlLD/license).

Seth Kontny<h1>Is  <span class="txt-rotate fw700" data-period="2500" data-rotate='[ "knowledge", "community", "an outlet", "postive", "a father","doing it" ]'></span></h1>

var TxtRotate = function(el, toRotate, period) {
  this.toRotate = toRotate;
  this.el = el;
  this.loopNum = 0;
  this.period = parseInt(period, 10) || 2000;
  this.txt = '';
  this.tick();
  this.isDeleting = false;
};

TxtRotate.prototype.tick = function() {
  var i = this.loopNum % this.toRotate.length;
  var fullTxt = this.toRotate[i];

  if (this.isDeleting) {
    this.txt = fullTxt.substring(0, this.txt.length - 1);
  } else {
    this.txt = fullTxt.substring(0, this.txt.length + 1);
  }

  this.el.innerHTML = '<span class="wrap">'+this.txt+'</span>';

  var that = this;
  var delta = 300 - Math.random() * 100;

  if (this.isDeleting) { delta /= 2; }

  if (!this.isDeleting && this.txt === fullTxt) {
    delta = this.period;
    this.isDeleting = true;
  } else if (this.isDeleting && this.txt === '') {
    this.isDeleting = false;
    this.loopNum++;
    delta = 500;
  }

  setTimeout(function() {
    that.tick();
  }, delta);
};

window.onload = function() {
  var elements = document.getElementsByClassName('txt-rotate');
  for (var i=0; i<elements.length; i++) {
    var toRotate = elements[i].getAttribute('data-rotate');
    var period = elements[i].getAttribute('data-period');
    if (toRotate) {
      new TxtRotate(elements[i], JSON.parse(toRotate), period);
    }
  }
  // INJECT CSS
  var css = document.createElement("style");
  css.type = "text/css";
  css.innerHTML = ".txt-rotate > .wrap { 10px; border-right: 0.08em solid #009966 }";
  document.body.appendChild(css);
};

$(function(){
  var onClass = "on";
  var showClass = "show";
  
  $("input").bind("checkval",function(){
    var label = $(this).prev("label");
    if(this.value !== ""){
      label.addClass(showClass);
    } else {
      label.removeClass(showClass);
    }
  }).on("keyup",function(){
    $(this).trigger("checkval");
  }).on("focus",function(){
    $(this).prev("label").addClass(onClass);
  }).on("blur",function(){
      $(this).prev("label").removeClass(onClass);
  }).trigger("checkval");
});

html,body {
  font-family: 'Open Sans', 'Helvetica Neue', sans-serif;
  padding: 3em 2em;
  font-size: 18px;
  background: #fff;
  color: #009966;
}

h1,h2 {
  font-weight: 300;
  margin: 0.4em 0;
}
h1 { font-size: 3.5em; }
h2 { font-size: 2.5em; font-weight: 700; color: #505050; }
h3 {
  color: #505050;
  font-size: 1.5em;
}
.fw700 {
  font-weight: 700;
}
input {
  font-size: 100%;
  background: #fff;
  border: none;
  color: #000;
  padding: 12px;
  margin: 0 -0.25em 0 0.3em;
  border-top-left-radius: 9px;
  border-bottom-left-radius: 9px;
  box-shadow: 0 0 5px rgba(0,0,0,0.5) inset;
}
#call {
  border-top-right-radius: none;
  border-radius: none;
}
::-webkit-input-placeholder {
   color: #222;
}

:-moz-placeholder { /* Firefox 18- */
   color: #222;  
}

::-moz-placeholder {  /* Firefox 19+ */
   color: #222;  
}

:-ms-input-placeholder {  
   color: #222;  
}

.inline {
  display: inline;
}

.button {
  display: inline-block;
  background: #009966;
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  padding: 0.44em 0.89em 0.39em;
  margin: 0 1em 0 0;
  border-top-right-radius: 9px;
  border-bottom-right-radius: 9px;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  margin-left: 0px;
  font-size: 1em;
  box-shadow: none;
  border: 1px solid rgba(0,0,0,0.1);
  border-left: none;
}

.field-wrapper {
  position:relative;
  margin-bottom:20px;
  display: inline-block;
}

label {
  position:absolute;
  bottom:-20px;
  left:6px;
  font-size:16px;
  color:#aaa;
  transition: all 0.1s linear;
  opacity:0;
  font-weight:bold;
  display: block;
}

label.on {
  color: #4481C4;
}

label.show {
  bottom: -30px;
  opacity: 1;
}

body {
  /* the following line fixes a blink in chrome https://code.google.com/p/chromium/issues/detail?id=108025 */
  -webkit-backface-visibility: hidden;
}