javascript - 如何为每个有大写字母的单词添加不同的颜色？

Question

如何为每个以大写字母开头的单词添加不同的颜色？

示例:Justin Creative Design Develope

这是我的代码

 var TxtType = function(el, toRotate, period) {
    this.toRotate = toRotate;
    this.el = el;
    this.loopNum = 0;
    this.period = parseInt(period, 10) || 2000;
    this.txt = '';
    this.tick();
    this.lastDeletingStatus=0;
    this.isDeleting = 0;
};
var timer;
TxtType.prototype.tick = function() {
    var i = this.loopNum % this.toRotate.length;
    var fullTxt = this.toRotate[i];

    if (this.isDeleting===1) {
        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 = 200 - Math.random() * 100;

    if (this.isDeleting===1) { delta /= 2; }

    if (this.isDeleting===0 && this.txt === fullTxt) {
        delta = this.period;
        this.isDeleting = 1;
    } else if (this.isDeleting===1 && this.txt === '') {
        this.isDeleting = 0;
        this.loopNum++;
        delta = 500;
    }

    if(this.isDeleting!==2){
    timer=setTimeout(function() {
	    that.tick();
        }, delta);
    }
};

TxtType.prototype.toggleStart=function(){
//start back up 
    if(this.isDeleting===2){
        this.isDeleting=this.lastDeletingStatus;
        this.lastDeletingStatus=2;
 }
//stop
else{
    this.lastDeletingStatus=this.isDeleting;
    this.isDeleting=2;
    clearTimeout(timer);
}
}
    var toggleStart=function(){
       txtType.toggleStart();
        txtType.tick();
    }
	var txtType;

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

body {
    background-color:#ce3635;
    text-align: center;
     color:#fff;
     padding-top:10em;
     font-family:Helvetica;
 }

* { color:#fff; text-decoration: none;}

<div class="type-wrap">
<h2>
  <a href="" class="typewrite" data-period="2000" data-type='[ "Hi, my name is Justin.", "I am Creative.", "I love Design with CSS.", "I love to Develop with javascript." ]'>
    <span class="wrap"></span></a>
</h2>
  
</div>

Answer 1

将以下内容添加到 tick()功能:

  var rgx = /\b([A-Z].*?)\b/g;
  var rep = `<span class='cap'>$1</span>`;
  var fullTxt = fullTxt.replace(rgx, rep);

它的作用是接受字符串 fullTxt并使用 replace()和一个正则表达式，用相同的单词替换任何匹配项(以大写字母开头的单词):

<span class='cap'> 字 </span>

另外不要忘记声明 .cap类 color CSS 的属性和值。

演示

var TxtType = function(el, toRotate, period) {
  this.toRotate = toRotate;
  this.el = el;
  this.loopNum = 0;
  this.period = parseInt(period, 10) || 2000;
  this.txt = '';
  this.tick();
  this.lastDeletingStatus = 0;
  this.isDeleting = 0;
};
var timer;
TxtType.prototype.tick = function() {
  var i = this.loopNum % this.toRotate.length;
  var fullTxt = this.toRotate[i];
  var rgx = /\b([A-Z].*?)\b/g;
  var rep = `<span class='cap'>$1</span>`;
  var fullTxt = fullTxt.replace(rgx, rep);

  if (this.isDeleting === 1) {
    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 = 200 - Math.random() * 100;

  if (this.isDeleting === 1) {
    delta /= 2;
  }

  if (this.isDeleting === 0 && this.txt === fullTxt) {
    delta = this.period;
    this.isDeleting = 1;
  } else if (this.isDeleting === 1 && this.txt === '') {
    this.isDeleting = 0;
    this.loopNum++;
    delta = 500;
  }

  if (this.isDeleting !== 2) {
    timer = setTimeout(function() {
      that.tick();
    }, delta);
  }
};

TxtType.prototype.toggleStart = function() {
  //start back up 
  if (this.isDeleting === 2) {
    this.isDeleting = this.lastDeletingStatus;
    this.lastDeletingStatus = 2;
  }
  //stop
  else {
    this.lastDeletingStatus = this.isDeleting;
    this.isDeleting = 2;
    clearTimeout(timer);
  }
}
var toggleStart = function() {
  txtType.toggleStart();
  txtType.tick();
}
var txtType;

window.onload = function() {
  var elements = document.getElementsByClassName('typewrite');
  for (var i = 0; i < elements.length; i++) {
    var toRotate = elements[i].getAttribute('data-type');
    var period = elements[i].getAttribute('data-period');
    if (toRotate) {
      txtType = new TxtType(elements[i], JSON.parse(toRotate), period);
    }

  }
  // INJECT CSS
  var css = document.createElement("style");
  css.type = "text/css";
  css.innerHTML = ".typewrite > .wrap { border-right: 0.08em solid #fff}";
  document.body.appendChild(css);
};

body {
  background-color: #ce3635;
  text-align: center;
  color: #fff;
  padding-top: 10em;
  font-family: Helvetica;
}

* {
  color: #fff;
  text-decoration: none;
}

.cap {
  color: yellow;
}

<div class="type-wrap">
  <h2>
    <a href="" class="typewrite" data-period="2000" data-type='[ "Hi, my name is Justin.", "I am Creative.", "I love Design with CSS.", "I love to Develop with javascript." ]'>
      <span class="wrap"></span></a>
  </h2>

</div>