一面文字自动收报机

Question

我使用HTML / CSS / JS创建了一个文本自动收录器，但几分钟后文本更改与动画失去同步，文本在可见时开始变化。如何改进代码，使其仅在隐藏时才会发生变化？

  var arr = ["text1", "text2", "text3", "text4"];

  (function headerMessage(counter) {
    var text = arr[counter];
    $('.header-message > span').text(text).animate({
      'margin-left': '0px'
    }, 500).delay("3000").animate({
      'margin-left': '-300px'
    }, 500);
    delete arr[counter];
    arr.push(text);
    setTimeout(function() {
      headerMessage(counter + 1);
    }, 4000);
  })(0);

.header-message {
  border-left: 1px solid #e3e3e3;
  padding-left: 10px;
  line-height: 58px;
  vertical-align: middle;
  float: left;
  margin-left: 10px;
  overflow: hidden;
}
.header-message span {
  font-family: Raleway;
  font-size: 14px;
  color: #979797;
  font-weight: 500;
  height: 30px;
  line-height: 30px;
  margin-left: -300px;
  vertical-align: middle
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="header-message">
  <span style="margin-left: 0px;">We love to help businesses like yours.</span>
</div>

Jsfiddle https://jsfiddle.net/qhtbsh2L/

Answer 1

您不应该使用单独的setInterval。尝试将更改文本操作排队到动画链中。

  var arr = ["text1", "text2", "text3", "text4"];

  (function headerMessage(counter) {
    var text = arr[counter];
    $('.header-message > span').text(text).animate({
      'margin-left': '0px'
    }, 500).delay("3000").animate({
      'margin-left': '-300px'
    }, 500).queue(function(next) {
      headerMessage(counter + 1);
      next();
    });
    delete arr[counter];
    arr.push(text);
  })(0);

.header-message {
  border-left: 1px solid #e3e3e3;
  padding-left: 10px;
  line-height: 58px;
  vertical-align: middle;
  float: left;
  margin-left: 10px;
  overflow: hidden;
}
.header-message span {
  font-family: Raleway;
  font-size: 14px;
  color: #979797;
  font-weight: 500;
  height: 30px;
  line-height: 30px;
  margin-left: -300px;
  vertical-align: middle
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="header-message">
  <span style="margin-left: 0px;">We love to help businesses like yours.</span>
</div>