设置父div的定位固定元素宽度无效

Question

我正在尝试修复position元素，并采用父div的完整宽度。这是我的html：

     <div class="col-md-3">
        <div class="player-avatar-card">
          <div class="card-body">
            <div class="avatar-image">
              <img src="/imagecache/small/{{ $player->image_filename }}" alt="Profile Image" class="rounded-circle">
              <img class="flag rounded-circle" src="/icons/flags-round/{{ $player->nationality }}.svg"></h3>
            </div>
            <h5>{{ $player->first_name }} {{ $player->last_name }}</h5>
            <p>{{ $player->nationality }}, {{ $player->age }} years</p>
            <div class="social-buttons">
              <div class="col-12">
                <a class="btn btn-info btn-lg" href="#" role="button">
                  <i class="ion-plus-round"></i> follow</a>
              </div>
              <div class="col-12">
                <a class="btn btn-info btn-outline-info" href="#" role="button">
                  <i class="ion-android-share-alt"></i> share</a>
              </div>
            </div>
          </div>
        </div>
      </div>

我player-avatar-card在滚动到元素时将位置定位类提供给：

  const avatarCard = document.querySelector('.player-avatar-card');
  const fixClassAvatar = 'is-fixed-avatar';

  function stickyScroll() {
    if( window.pageYOffset > 56 ) {
      avatarCard.classList.add(fixClassAvatar);
    }
    if( window.pageYOffset < 56 ) {
      avatarCard.classList.remove(fixClassAvatar);
    }
  }
  $(window).scroll(stickyScroll);

这是课程：

.is-fixed-avatar {
  position: fixed;
  max-width: inherit;
  width: 100%;
}

但是，该元素超出了col-md-3div，我该如何解决？

这是小提琴。确保在屏幕上展开它，使其足够宽以使其可以正常工作。

Answer 1

如果您使用position: fixed，则 div 将从流中取出，从而从 div 中取出col-md-3。我建议这样做absolute：

.profile-content .player-info .is-fixed-avatar {
  position: absolute;
  left: 0;
  right: 0;
}

现在您可以使用jQuery来放置一些粘性avatar- 通过最小化窗口高度来检查它。请参阅下面的简化演示（最后一个section-card位于 内col-md-9）：

.profile-content .player-info .is-fixed-avatar {
  position: absolute;
  left: 0;
  right: 0;
}

$(document).ready(function() {
  const avatar = $('.player-avatar-card');
  const avatarBox = avatar.parent();

  function sticky() {
    var offset = avatarBox.offset().top - $(window).scrollTop();
    if (offset >= 0) {
      avatar.css('top', '0');
      return;
    }
    avatar.offset({
      'left': avatar.offset().left,
      'top': -offset + 90 // 90px to adjust for padding
    });
  }
  $(window).scroll(sticky);
});

body {
  background: #fff;
  color: #484848 !important;
}

.is-fixed {
  position: fixed;
  left: 0;
  right: 0;
  z-index: 10;
  top: 0;
}

.page-nav {
  height: 56px;
  border-bottom: 1px solid #f1eeee;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
  background: #fff;
}

.page-nav .section-links .active {
  border-bottom: 2px solid #008489;
  color: #008489;
  font-weight: 500;
}

.page-nav .nav {
  height: 56px;
  display: -webkit-box;
  display: flex;
  -webkit-box-align: center;
  align-items: center;
}

.page-nav .nav .nav-link {
  height: 56px;
  display: -webkit-box;
  display: flex;
  -webkit-box-align: center;
  align-items: center;
  min-width: 100px;
  -webkit-box-pack: center;
  justify-content: center;
  color: #484848;
}

.lg-strong-font {
  font-size: 34px;
  font-weight: 500;
  color: #e90052;
}

.lg-strong-font span {
  font-size: 1rem;
}

.profile-content {
  padding: 2rem 0;
  background: #f7f7f7;
}

.profile-content .info-content {
  padding-left: 3rem;
  padding-right: 3rem;
}

.profile-content .title-margin {
  margin-bottom: 1.5rem;
}

.profile-content .title-icon {
  color: #008489;
  margin-right: 1.7rem;
  margin-left: 2px;
}

.profile-content .info-title-hr {
  margin-left: 3rem;
  margin-right: 3rem;
}

.profile-content .section-card {
  margin-top: 1.5rem;
  background: #fff;
  padding: 1.5rem;
  border: 1px solid #f1eeee;
}

.profile-content .sub-section {
  margin-top: 2rem;
}

.profile-content .icon-wrapper {
  width: 30px;
  height: 30px;
  display: -webkit-box;
  display: flex;
  -webkit-box-align: center;
  align-items: center;
  -webkit-box-pack: center;
  justify-content: center;
}

.profile-content .icon-wrapper i {
  color: #008489;
}

.profile-content .video-section {
  margin: 0;
  margin-left: -5px;
}

.profile-content .video-section .profile-video-box {
  padding: 0;
  padding-left: 5px;
  margin-bottom: 10px;
}

.profile-content .player-info .icon-box {
  padding-right: 0;
  padding-top: 8px;
}

.profile-content .player-info .player-info-card-content {
  margin-top: 0;
}

.profile-content .player-info .is-fixed-avatar {
  position: absolute;
  left: 0;
  right: 0;
}

.profile-content .player-info .player-avatar-card {
  display: -webkit-box;
  display: flex;
  -webkit-box-pack: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem 0;
  border: 1px solid #f1eeee;
  background: #fff;
}

.profile-content .player-info .player-avatar-card .card-body {
  width: 100%;
}

.profile-content .player-info .player-avatar-card p {
  margin-bottom: 0.2rem;
  font-size: 0.8rem;
  color: #7b7b7b;
}

.profile-content .player-info .player-avatar-card .avatar-image {
  position: relative;
  margin-bottom: 1.5rem;
  display: inline-block;
}

.profile-content .player-info .player-avatar-card .avatar-image img {
  width: 120px;
  height: 120px;
}

.profile-content .player-info .player-avatar-card .avatar-image .flag {
  position: absolute;
  bottom: 10px;
  right: -5px;
  width: 35px;
  height: 35px;
  border: 3px solid #fff;
}

.profile-content .player-info .player-avatar-card .icon {
  width: 30px;
  height: 30px;
  margin-right: 5px;
}

.profile-content .player-info .player-avatar-card .card-title {
  margin: 0.5rem 0;
}

.profile-content .player-info .social-buttons {
  margin-top: 1rem;
}

.profile-content .player-info .social-buttons .btn {
  border-radius: 200px;
  font-weight: 500;
  margin: 0.5rem;
}

.profile-content .player-info .social-buttons .btn i {
  margin-right: 10px;
}

.profile-content .table>thead>tr>th,
.profile-content .table>tbody>tr>th,
.profile-content .table>tfoot>tr>th,
.profile-content .table>thead>tr>td,
.profile-content .table>tbody>tr>td,
.profile-content .table>tfoot>tr>td {
  line-height: 1.42857143;
  vertical-align: top;
  border: 0 !important;
}

.profile-content .table>thead>tr>th {
  text-align: center;
}

.profile-content .table>thead>tr>th .icon-wrapper {
  margin: auto;
}

.profile-content .table>thead>tr>th,
.profile-content .table>tbody>tr>td {
  max-width: 110px !important;
  vertical-align: middle;
}

.profile-content .table>thead {
  border-bottom: 1px solid #f1eeee;
  background: #fff;
}

.profile-content .table-responsive {
  margin-bottom: 0;
}

.profile-content .no-data-message {
  margin-top: 1.5rem;
}

.profile-content .years {
  font-size: 14px;
  font-weight: 500;
}

.profile-content .info-label {
  font-weight: 400;
  font-size: 0.8rem;
  color: #7b7b7b;
}

footer {
  height: 20rem;
  padding: 20px 0;
  position: relative;
  z-index: 1;
  display: -webkit-box;
  display: flex;
  -webkit-box-align: center;
  align-items: center;
  background-color: #fff;
  color: #3c3e42;
  border-top: 1px solid rgba(204, 204, 204, 0.4);
}

footer h4 {
  font-weight: 700;
}

footer a {
  display: block;
  font-weight: 500;
  margin-bottom: 10px;
}

.search-result {
  margin-top: 2rem;
}

.search-result .search-list {
  margin-top: 1rem;
}

.search-result .query-card {
  color: #fff;
  background: #00bcd4;
}

.search-result .query-card .card-block {
  padding: 1rem;
}

.search-result .search-list-media .media img {
  width: 160px;
  height: auto;
}

.search-result .media {
  margin-top: 10px !important;
}

.search-result .media-body p {
  margin: 0 !important;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
}

.search-result .tab-content {
  padding: 1rem;
}

.search-result .pagination,
.search-result .tab-content {
  margin-top: 2rem;
}

.contact-form .card {
  padding: 1rem;
}

body {
  overflow-x: hidden;
  position: relative;
}

#wrapper {
  position: relative;
  z-index: 10;
  top: 0;
  left: 0;
  transition: all 0.4s;
}

.menu {
  position: fixed;
  z-index: 20;
  overflow: hidden;
  transition: all 0.4s;
  color: #008489;
  padding: 45px;
  padding-top: 3rem;
  background: #333;
}

.menu a {
  color: #e4e4e4;
}

.menu h4 {
  margin-top: 10px;
}

.menu .btn {
  margin-top: 1rem;
}

.push-menu-left {
  top: 50px;
  width: 280px;
  height: 100%;
  box-shadow: -4px 1px 5px 0px rgba(0, 0, 0, 0.2);
  -webkit-box-shadow: -4px 1px 5px 0px rgba(0, 0, 0, 0.2);
}

.push-menu-left {
  right: -285px;
}