平滑滚动适用于导航栏,但不适用于其他元素(箭头等)

时间:2018-11-09 21:19:42

标签: jquery html ruby-on-rails scroll

我有一个使用jQuery平滑滚动功能的Rails应用程序。平滑滚动适用于导航栏链接,但不适用于“向下滚动”箭头或“返回顶部”箭头。我尝试添加脚本标记以直接在元素上实现行为,但是没有运气。任何建议表示赞赏!

这是滚动功能-

// Select all links with hashes
$('a[href*="#"]')
  // Remove links that don't actually link to anything
  .not('[href="#"]')
  .not('[href="#0"]')
  .click(function(event) {
    // On-page links
    if (
      location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') 
      && 
      location.hostname == this.hostname
    ) {
      // Figure out element to scroll to
      var target = $(this.hash);
      target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
      // Does a scroll target exist?
      if (target.length) {
        // Only prevent default if animation is actually gonna happen
        event.preventDefault();
        $('html, body').animate({
          scrollTop: target.offset().top
        }, 1000, function() {
          // Callback after animation
          // Must change focus!
          var $target = $(target);
          $target.focus();
          if ($target.is(":focus")) { // Checking if the target was focused
            return false;
          } else {
            $target.attr('tabindex','-1'); // Adding tabindex for elements not focusable
            $target.focus(); // Set focus again
          };
        });
      }
    }
  });

  

这是包含向下箭头的块。带有(此处为一些文本)的括号不在我的实际代码中,我只是将其更改为S / O。 -

<div class="typebox" style="min-height: 119px;">
	  <div id="typed-strings">
	  <h3 class="type-active"><strong style="font-size: 20px; line-height: 1.5em;"> (some text here) <br> (some more text here) &nbsp; <br><br><a href="#web-apps"><%= image_tag "down-arrow.png", class: "down-arrow"%></a></strong></h3>
	 </div> 
	 <span id="typed"></span>	
	 <br />
	</div>

1 个答案:

答案 0 :(得分:1)

我无法在链接上找到您的代码,但是看到您的网站,我会想到以下几点:

1)设置点击回调时,您的向下箭头不存在,稍后会添加该键入效果,因此不会在该A标签上设置点击回调。我想您使用的那个库中有一些事件可以让您知道效果已经完成,然后您可以为该A标签设置回调

2)自上而下的箭头上有href="#",该行未明确选择用于行.not('[href="#"]')的click函数,我想您是从其他地方复制了该函数的,您可以添加一个该标签的href后面的id并在网站顶部添加一个带有该ID的元素


编辑:要修复向下箭头事件侦听器,我会这样做:

1,将函数移到参数之外

function scroll_to_hash(event) {
  // On-page links
  if (
    location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') 
    && 
    location.hostname == this.hostname
  ) {
    // Figure out element to scroll to
    var target = $(this.hash);
    target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
    // Does a scroll target exist?
    if (target.length) {
      // Only prevent default if animation is actually gonna happen
      event.preventDefault();
      $('html, body').animate({
        scrollTop: target.offset().top
      }, 1000, function() {
        // Callback after animation
        // Must change focus!
        var $target = $(target);
        $target.focus();
        if ($target.is(":focus")) { // Checking if the target was focused
          return false;
        } else {
          $target.attr('tabindex','-1'); // Adding tabindex for elements not focusable
          $target.focus(); // Set focus again
        };
      });
    }
  }
}

// Select all links with hashes
$('a[href*="#"]')
  // Remove links that don't actually link to anything
  .not('[href="#"]')
  .not('[href="#0"]')
  .click(scroll_to_hash);

2,我猜您正在使用Typed.js,您有一个onComplete回调https://mattboldt.com/typed.js/docs/,然后您可以在选项上为该回调设置向下箭头的click事件初始化插件

onComplete: function(self) {
  $('a[href="#web-apps"]').click(scroll_to_hash)
}
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