CSS

Question

我想在我的导航栏中实现一个自动完成字段。

var substringMatcher = function(strs) {
  console.log('strs', strs);
  return function findMatches(q, cb) {
    console.log('q', q);
    var matches, substringRegex;

    // an array that will be populated with substring matches
    matches = [];
    console.log('matches', matches);

    // regex used to determine if a string contains the substring `q`
    substrRegex = new RegExp(q, 'i');

    // iterate through the pool of strings and for any string that
    // contains the substring `q`, add it to the `matches` array
    $.each(strs, function(i, str) {
      if (substrRegex.test(str)) {
        matches.push(str);
      }
    });

    console.log('matches', matches);

    cb(matches);
  };
};

var states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California',
  'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii',
  'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana',
  'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota',
  'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire',
  'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota',
  'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island',
  'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont',
  'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'
];

$('#searchField').typeahead({
  hint: true,
  highlight: true,
  minLength: 1
}, {
  name: 'states',
  source: substringMatcher(states)
});

span.twitter-typeahead .tt-menu {
  cursor: pointer;
}

.dropdown-menu,
span.twitter-typeahead .tt-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  display: none;
  float: left;
  min-width: 160px;
  padding: 5px 0;
  margin: 2px 0 0;
  font-size: 1rem;
  color: #373a3c;
  text-align: left;
  list-style: none;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 0.25rem;
}

span.twitter-typeahead .tt-suggestion {
  display: block;
  width: 100%;
  padding: 3px 20px;
  clear: both;
  font-weight: normal;
  line-height: 1.5;
  color: #373a3c;
  text-align: inherit;
  white-space: nowrap;
  background: #fff;
  border: 0;
}

span.twitter-typeahead .tt-suggestion:focus,
.dropdown-item:hover,
span.twitter-typeahead .tt-suggestion:hover {
  color: #2b2d2f;
  text-decoration: none;
  background-color: #f5f5f5;
}

span.twitter-typeahead .active.tt-suggestion,
span.twitter-typeahead .tt-suggestion.tt-cursor,
span.twitter-typeahead .active.tt-suggestion:focus,
span.twitter-typeahead .tt-suggestion.tt-cursor:focus,
span.twitter-typeahead .active.tt-suggestion:hover,
span.twitter-typeahead .tt-suggestion.tt-cursor:hover {
  color: #fff;
  text-decoration: none;
  background-color: #0275d8;
  outline: 0;
}

span.twitter-typeahead .disabled.tt-suggestion,
span.twitter-typeahead .disabled.tt-suggestion:focus,
span.twitter-typeahead .disabled.tt-suggestion:hover {
  color: #818a91;
}

span.twitter-typeahead .disabled.tt-suggestion:focus,
span.twitter-typeahead .disabled.tt-suggestion:hover {
  text-decoration: none;
  cursor: not-allowed;
  background-color: #fff;
  background-image: none;
  filter: "progid:DXImageTransform.Microsoft.gradient(enabled = false)";
}

span.twitter-typeahead {
  width: 100%;
}

.input-group span.twitter-typeahead {
  display: block !important;
}

.input-group span.twitter-typeahead .tt-menu {
  top: 2.375rem !important;
}

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" crossorigin="anonymous">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.4.0/font/bootstrap-icons.css">
<link rel="stylesheet" href="https://unpkg.com/@tarekraafat/autocomplete.js@9.1.1/dist/css/autoComplete.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/typeahead.js/0.10.3/typeahead.bundle.min.js" integrity="sha512-E4rXB8fOORHVM/jZYNCX2rIY+FOvmTsWJ7OKZOG9x/0RmMAGyyzBqZG0OGKMpTyyuXVVoJsKKWYwbm7OU2klxA==" crossorigin="anonymous"></script>

<header class="p-3 bg-dark text-white">
  <div class="container">
    <div class="d-flex flex-wrap align-items-center justify-content-center justify-content-lg-start">

      <ul class="nav col-12 col-lg-auto me-lg-auto mb-2 justify-content-center mb-md-0">
        <li><a href="" class="nav-link px-2 text-secondary">Products</a></li>
      </ul>

      <form name="searchForm" id="searchForm" class="col-12 col-lg-auto mb-3 mb-lg-0 me-lg-3" method="POST" action="#">
        <input name="searchField" id="searchField" type="search" class="form-control form-control-dark typeahead" style="width: 426px; " placeholder="Search for news, symbols, tickers or companies">
      </form>
    </div>
  </div>
</header>

我正在尝试从我的 states 数组中加载值。但是，在搜索框中输入值时，我只会返回 undefined。

基本上我想要以下行为：

关于如何取回状态名称而不是 undefined 值的任何建议？

感谢您的回复！

Answer 1

设法让它工作，你只需要将你的库更新到 cdn 中可用的最新版本，你正在使用版本 0.10.3，它应该是 0.11.3.

https://cdnjs.com/libraries/typeahead.js/0.11.1

var substringMatcher = function(strs) {
  return function findMatches(q, cb) {
    var matches, substringRegex;

    // an array that will be populated with substring matches
    matches = [];

    // regex used to determine if a string contains the substring `q`
    substrRegex = new RegExp(q, 'i');

    // iterate through the pool of strings and for any string that
    // contains the substring `q`, add it to the `matches` array
    $.each(strs, function(i, str) {
      if (substrRegex.test(str)) {
        matches.push(str);
      }
    });

    cb(matches);
  };
};

var states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California',
  'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii',
  'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana',
  'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota',
  'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire',
  'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota',
  'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island',
  'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont',
  'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'
];

$('#searchField').typeahead({
  hint: true,
  highlight: true,
  minLength: 1
}, {
  name: 'states',
  source: substringMatcher(states)
});

span.twitter-typeahead .tt-menu {
  cursor: pointer;
}

.dropdown-menu,
span.twitter-typeahead .tt-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  display: none;
  float: left;
  min-width: 160px;
  padding: 5px 0;
  margin: 2px 0 0;
  font-size: 1rem;
  color: #373a3c;
  text-align: left;
  list-style: none;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 0.25rem;
}

span.twitter-typeahead .tt-suggestion {
  display: block;
  width: 100%;
  padding: 3px 20px;
  clear: both;
  font-weight: normal;
  line-height: 1.5;
  color: #373a3c;
  text-align: inherit;
  white-space: nowrap;
  background: #fff;
  border: 0;
}

span.twitter-typeahead .tt-suggestion:focus,
.dropdown-item:hover,
span.twitter-typeahead .tt-suggestion:hover {
  color: #2b2d2f;
  text-decoration: none;
  background-color: #f5f5f5;
}

span.twitter-typeahead .active.tt-suggestion,
span.twitter-typeahead .tt-suggestion.tt-cursor,
span.twitter-typeahead .active.tt-suggestion:focus,
span.twitter-typeahead .tt-suggestion.tt-cursor:focus,
span.twitter-typeahead .active.tt-suggestion:hover,
span.twitter-typeahead .tt-suggestion.tt-cursor:hover {
  color: #fff;
  text-decoration: none;
  background-color: #0275d8;
  outline: 0;
}

span.twitter-typeahead .disabled.tt-suggestion,
span.twitter-typeahead .disabled.tt-suggestion:focus,
span.twitter-typeahead .disabled.tt-suggestion:hover {
  color: #818a91;
}

span.twitter-typeahead .disabled.tt-suggestion:focus,
span.twitter-typeahead .disabled.tt-suggestion:hover {
  text-decoration: none;
  cursor: not-allowed;
  background-color: #fff;
  background-image: none;
  filter: "progid:DXImageTransform.Microsoft.gradient(enabled = false)";
}

span.twitter-typeahead {
  width: 100%;
}

.input-group span.twitter-typeahead {
  display: block !important;
}

.input-group span.twitter-typeahead .tt-menu {
  top: 2.375rem !important;
}

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" crossorigin="anonymous">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.4.0/font/bootstrap-icons.css">
<link rel="stylesheet" href="https://unpkg.com/@tarekraafat/autocomplete.js@9.1.1/dist/css/autoComplete.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<!-- Updated the script below -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/typeahead.js/0.11.1/typeahead.bundle.min.js" integrity="sha512-qOBWNAMfkz+vXXgbh0Wz7qYSLZp6c14R0bZeVX2TdQxWpuKr6yHjBIM69fcF8Ve4GUX6B6AKRQJqiiAmwvmUmQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

<header class="p-3 bg-dark text-white">
  <div class="container">
    <div class="d-flex flex-wrap align-items-center justify-content-center justify-content-lg-start">

      <ul class="nav col-12 col-lg-auto me-lg-auto mb-2 justify-content-center mb-md-0">
        <li><a href="" class="nav-link px-2 text-secondary">Products</a></li>
      </ul>

      <form name="searchForm" id="searchForm" class="col-12 col-lg-auto mb-3 mb-lg-0 me-lg-3" method="POST" action="#">
        <input name="searchField" id="searchField" type="search" class="form-control form-control-dark typeahead" style="width: 426px; " placeholder="Search for news, symbols, tickers or companies">
      </form>
    </div>
  </div>
</header>

编辑：来自 changelog 版本 0.11.0

An overhaul of typeahead.js – consider this a release candidate for v1. There are bunch of API changes with this release so don't expect backwards compatibility with previous versions.

Beware that since this release is pretty much a rewrite, there are bound to be some bugs.

Answer 2

问题：

您得到的是 undefined，因为根据库版本 0.10.3，callback 函数需要以下格式的结果：[{value: String}].

解决方案：

$.each(strs, function (i, str) {
  if (substrRegex.test(str)) {
    matches.push({value: str}); //--> here
  }
});

var substringMatcher = function(strs) {
  return function findMatches(q, cb) {
    var matches, substringRegex;

    // an array that will be populated with substring matches
    matches = [];

    // regex used to determine if a string contains the substring `q`
    substrRegex = new RegExp(q, 'i');

    // iterate through the pool of strings and for any string that
    // contains the substring `q`, add it to the `matches` array
    $.each(strs, function(i, str) {
      if (substrRegex.test(str)) {
        matches.push({
          value: str
        });
      }
    });


    cb(matches);
  };
};

var states = ['Alabama', 'Alaska', 'Arizona', 'Arkansas', 'California',
  'Colorado', 'Connecticut', 'Delaware', 'Florida', 'Georgia', 'Hawaii',
  'Idaho', 'Illinois', 'Indiana', 'Iowa', 'Kansas', 'Kentucky', 'Louisiana',
  'Maine', 'Maryland', 'Massachusetts', 'Michigan', 'Minnesota',
  'Mississippi', 'Missouri', 'Montana', 'Nebraska', 'Nevada', 'New Hampshire',
  'New Jersey', 'New Mexico', 'New York', 'North Carolina', 'North Dakota',
  'Ohio', 'Oklahoma', 'Oregon', 'Pennsylvania', 'Rhode Island',
  'South Carolina', 'South Dakota', 'Tennessee', 'Texas', 'Utah', 'Vermont',
  'Virginia', 'Washington', 'West Virginia', 'Wisconsin', 'Wyoming'
];

$('#searchField').typeahead({
  hint: true,
  highlight: true,
  minLength: 1
}, {
  name: 'states',
  source: substringMatcher(states)
});

span.twitter-typeahead .tt-menu {
  cursor: pointer;
}

.dropdown-menu,
span.twitter-typeahead .tt-menu {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1000;
  display: none;
  float: left;
  min-width: 160px;
  padding: 5px 0;
  margin: 2px 0 0;
  font-size: 1rem;
  color: #373a3c;
  text-align: left;
  list-style: none;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 0.25rem;
}

span.twitter-typeahead .tt-suggestion {
  display: block;
  width: 100%;
  padding: 3px 20px;
  clear: both;
  font-weight: normal;
  line-height: 1.5;
  color: #373a3c;
  text-align: inherit;
  white-space: nowrap;
  background: #fff;
  border: 0;
}

span.twitter-typeahead .tt-suggestion:focus,
.dropdown-item:hover,
span.twitter-typeahead .tt-suggestion:hover {
  color: #2b2d2f;
  text-decoration: none;
  background-color: #f5f5f5;
}

span.twitter-typeahead .active.tt-suggestion,
span.twitter-typeahead .tt-suggestion.tt-cursor,
span.twitter-typeahead .active.tt-suggestion:focus,
span.twitter-typeahead .tt-suggestion.tt-cursor:focus,
span.twitter-typeahead .active.tt-suggestion:hover,
span.twitter-typeahead .tt-suggestion.tt-cursor:hover {
  color: #fff;
  text-decoration: none;
  background-color: #0275d8;
  outline: 0;
}

span.twitter-typeahead .disabled.tt-suggestion,
span.twitter-typeahead .disabled.tt-suggestion:focus,
span.twitter-typeahead .disabled.tt-suggestion:hover {
  color: #818a91;
}

span.twitter-typeahead .disabled.tt-suggestion:focus,
span.twitter-typeahead .disabled.tt-suggestion:hover {
  text-decoration: none;
  cursor: not-allowed;
  background-color: #fff;
  background-image: none;
  filter: "progid:DXImageTransform.Microsoft.gradient(enabled = false)";
}

span.twitter-typeahead {
  width: 100%;
}

.input-group span.twitter-typeahead {
  display: block !important;
}

.input-group span.twitter-typeahead .tt-menu {
  top: 2.375rem !important;
}

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" crossorigin="anonymous">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.4.0/font/bootstrap-icons.css">
<link rel="stylesheet" href="https://unpkg.com/@tarekraafat/autocomplete.js@9.1.1/dist/css/autoComplete.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/typeahead.js/0.10.3/typeahead.bundle.min.js" integrity="sha512-E4rXB8fOORHVM/jZYNCX2rIY+FOvmTsWJ7OKZOG9x/0RmMAGyyzBqZG0OGKMpTyyuXVVoJsKKWYwbm7OU2klxA==" crossorigin="anonymous"></script>

<header class="p-3 bg-dark text-white">
  <form name="searchForm" id="searchForm" class="col-12 col-lg-auto mb-3 mb-lg-0 me-lg-3" method="POST" action="#">
    <input name="searchField" id="searchField" type="search" class="form-control form-control-dark typeahead" style="width: 426px; " placeholder="Search for news, symbols, tickers or companies">
  </form>
</header>

CSS - 使用 Typehead.js 和 Bootstrap 5 时未定义

CSS - Getting undefined when using Typehead.js with Bootstrap 5

javascript

typeahead.js

问题：

解决方案：