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Egor Trutnev
Asked:2020-11-20 07:55:52 +0000 UTC2020-11-20 07:55:52 +0000 UTC

jquery 自动完成。如何突出比赛？

  • 772

任务是为下拉菜单制作一个搜索引擎。决定在jquery上实现。我从官网拿了一个现成的例子。

唯一不适合我的是文本中的匹配项没有以粗体突出显示。我更改了代码，以便在 tags 中进行匹配<strong>...</strong>。

有关该问题的更多信息：我需要将与搜索词匹配的字母和数字加粗。例如，我输入asi或avascr，在下拉菜单中，文本应如下所示：分别为 B ASI C 或JavaScr ipt。

但是，标签不会被样式替换。有谁知道如何解决这一问题？

$( function() {
    $.widget( "custom.combobox", {
      _create: function() {
        this.wrapper = $( "<span>" )
          .addClass( "custom-combobox" )
          .insertAfter( this.element );
 
        this.element.hide();
        this._createAutocomplete();
        this._createShowAllButton();
      },
 
      _createAutocomplete: function() {
        var selected = this.element.children( ":selected" ),
          value = selected.val() ? selected.text() : "";
 
        this.input = $( "<input>" )
          .appendTo( this.wrapper )
          .val( value )
          .attr( "title", "" )
          .addClass( "custom-combobox-input ui-widget ui-widget-content ui-state-default ui-corner-left" )
          .autocomplete({
            delay: 0,
            minLength: 0,
            source: $.proxy( this, "_source" )
          })
          .tooltip({
            classes: {
              "ui-tooltip": "ui-state-highlight"
            }
          });
 
        this._on( this.input, {
          autocompleteselect: function( event, ui ) {
            ui.item.option.selected = true;
            this._trigger( "select", event, {
              item: ui.item.option
            });
          },
 
          autocompletechange: "_removeIfInvalid"
        });
      },
 
      _createShowAllButton: function() {
        var input = this.input,
          wasOpen = false;
 
        $( "<a>" )
          .attr( "tabIndex", -1 )
          .attr( "title", "Show All Items" )
          .tooltip()
          .appendTo( this.wrapper )
          .button({
            icons: {
              primary: "ui-icon-triangle-1-s"
            },
            text: false
          })
          .removeClass( "ui-corner-all" )
          .addClass( "custom-combobox-toggle ui-corner-right" )
          .on( "mousedown", function() {
            wasOpen = input.autocomplete( "widget" ).is( ":visible" );
          })
          .on( "click", function() {
            input.trigger( "focus" );
 
            // Close if already visible
            if ( wasOpen ) {
              return;
            }
 
            // Pass empty string as value to search for, displaying all results
            input.autocomplete( "search", "" );
          });
      },
 
      _source: function( request, response ) {
        var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "gi");
        response( this.element.children( "option" ).map(function() {
            var text = $(this).text().replace(matcher, function(str) {
                return '<strong>' + str + '</strong>'
            });
          if ( this.value && ( !request.term || matcher.test(text) ) )
            return {
              label: text,
              value: text,
              option: this
            };
        }) );
      },
 
      _removeIfInvalid: function( event, ui ) {
 
        // Selected an item, nothing to do
        if ( ui.item ) {
          return;
        }
 
        // Search for a match (case-insensitive)
        var value = this.input.val(),
          valueLowerCase = value.toLowerCase(),
          valid = false;
        this.element.children( "option" ).each(function() {
          if ( $( this ).text().toLowerCase() === valueLowerCase ) {
            this.selected = valid = true;
            return false;
          }
        });
 
        // Found a match, nothing to do
        if ( valid ) {
          return;
        }
 
        // Remove invalid value
        this.input
          .val( "" )
          .attr( "title", value + " didn't match any item" )
          .tooltip( "open" );
        this.element.val( "" );
        this._delay(function() {
          this.input.tooltip( "close" ).attr( "title", "" );
        }, 2500 );
        this.input.autocomplete( "instance" ).term = "";
      },
 
      _destroy: function() {
        this.wrapper.remove();
        this.element.show();
      }
    });
 
    $( "#combobox" ).combobox();
    $( "#toggle" ).on( "click", function() {
      $( "#combobox" ).toggle();
    });
  } );
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  
<div class="ui-widget">
  <label>Your preferred programming language: </label>
  <select id="combobox">
    <option value="">Select one...</option>
    <option value="ActionScript">ActionScript</option>
    <option value="AppleScript">AppleScript</option>
    <option value="Asp">Asp</option>
    <option value="BASIC">BASIC</option>
    <option value="C">C</option>
    <option value="C++">C++</option>
    <option value="Clojure">Clojure</option>
    <option value="COBOL">COBOL</option>
    <option value="ColdFusion">ColdFusion</option>
    <option value="Erlang">Erlang</option>
    <option value="Fortran">Fortran</option>
    <option value="Groovy">Groovy</option>
    <option value="Haskell">Haskell</option>
    <option value="Java">Java</option>
    <option value="JavaScript">JavaScript</option>
    <option value="Lisp">Lisp</option>
    <option value="Perl">Perl</option>
    <option value="PHP">PHP</option>
    <option value="Python">Python</option>
    <option value="Ruby">Ruby</option>
    <option value="Scala">Scala</option>
    <option value="Scheme">Scheme</option>
  </select>
</div>

PS 问题是强' 和粘贴时被转换为文本，而不是标签。所以可以看到源码中文字的外观如下：

<div id="ui-id-123" tabindex="-1" class="ui-menu-item-wrapper">&lt;strong&gt;As&lt;/strong&gt;p</div>

代替

<div id="ui-id-123" tabindex="-1" class="ui-menu-item-wrapper"><strong>As</strong>p</div>

这就是导致问题的原因

javascript

1 个回答

  1. Best Answer

    选项 1 -对代码更改最少的解决方案：

    $(function() {
  $.widget("custom.combobox", {
    _create: function() {
      this.wrapper = $("<span>")
        .addClass("custom-combobox")
        .insertAfter(this.element);

      this.element.hide();
      this._createAutocomplete();
      this._createShowAllButton();
    },

    _createAutocomplete: function() {
      var selected = this.element.children(":selected"),
        value = selected.val() ? selected.text() : "";

      this.input = $("<input>")
        .appendTo(this.wrapper)
        .val(value)
        .attr("title", "")
        .addClass("custom-combobox-input ui-widget ui-widget-content ui-state-default ui-corner-left")
        .autocomplete({
          delay: 0,
          minLength: 0,
          source: $.proxy(this, "_source"),
          create: function() {
            $(this).data('ui-autocomplete')._renderItem = function(ul, item) {
              return $("<li>")
                .append('<div>' + item.label + '</div>')
                .appendTo(ul);
            }
          }
        })
        .tooltip({
          classes: {
            "ui-tooltip": "ui-state-highlight"
          }
        });

      this._on(this.input, {
        autocompleteselect: function(event, ui) {
          ui.item.option.selected = true;
          this._trigger("select", event, {
            item: ui.item.option
          });
        },

        autocompletechange: "_removeIfInvalid"
      });
    },

    _createShowAllButton: function() {
      var input = this.input,
        wasOpen = false;

      $("<a>")
        .attr("tabIndex", -1)
        .attr("title", "Show All Items")
        .tooltip()
        .appendTo(this.wrapper)
        .button({
          icons: {
            primary: "ui-icon-triangle-1-s"
          },
          text: false
        })
        .removeClass("ui-corner-all")
        .addClass("custom-combobox-toggle ui-corner-right")
        .on("mousedown", function() {
          wasOpen = input.autocomplete("widget").is(":visible");
        })
        .on("click", function() {
          input.trigger("focus");

          // Close if already visible
          if (wasOpen) {
            return;
          }

          // Pass empty string as value to search for, displaying all results
          input.autocomplete("search", "");
        });
    },

    _source: function(request, response) {
      var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "gi");
      response(this.element.children("option").map(function() {
        var text = $(this).text().replace(matcher, '<strong>$&</strong>');
        if (this.value && (!request.term || matcher.test(text)))
          return {
            label: text,
            value: text,
            option: this
          };
      }));
    },

    _removeIfInvalid: function(event, ui) {

      // Selected an item, nothing to do
      if (ui.item) {
        return;
      }

      // Search for a match (case-insensitive)
      var value = this.input.val(),
        valueLowerCase = value.toLowerCase(),
        valid = false;
      this.element.children("option").each(function() {
        if ($(this).text().toLowerCase() === valueLowerCase) {
          this.selected = valid = true;
          return false;
        }
      });

      // Found a match, nothing to do
      if (valid) {
        return;
      }

      // Remove invalid value
      this.input
        .val("")
        .attr("title", value + " didn't match any item")
        .tooltip("open");
      this.element.val("");
      this._delay(function() {
        this.input.tooltip("close").attr("title", "");
      }, 2500);
      this.input.autocomplete("instance").term = "";
    },

    _destroy: function() {
      this.wrapper.remove();
      this.element.show();
    }
  });

  $("#combobox").combobox();
  $("#toggle").on("click", function() {
    $("#combobox").toggle();
  });
});
    <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">

<div class="ui-widget">
  <label>Your preferred programming language: </label>
  <select id="combobox">
        <option value="">Select one...</option>
        <option value="ActionScript">ActionScript</option>
        <option value="AppleScript">AppleScript</option>
        <option value="Asp">Asp</option>
        <option value="BASIC">BASIC</option>
        <option value="C">C</option>
        <option value="C++">C++</option>
        <option value="Clojure">Clojure</option>
        <option value="COBOL">COBOL</option>
        <option value="ColdFusion">ColdFusion</option>
        <option value="Erlang">Erlang</option>
        <option value="Fortran">Fortran</option>
        <option value="Groovy">Groovy</option>
        <option value="Haskell">Haskell</option>
        <option value="Java">Java</option>
        <option value="JavaScript">JavaScript</option>
        <option value="Lisp">Lisp</option>
        <option value="Perl">Perl</option>
        <option value="PHP">PHP</option>
        <option value="Python">Python</option>
        <option value="Ruby">Ruby</option>
        <option value="Scala">Scala</option>
        <option value="Scheme">Scheme</option>
      </select>
</div>

    方案二——前面提出的改变整个菜单文字样式的思路：

    选项 2.1 -最短但可能不是最漂亮的

    .ui-menu-item{
font-weight: bold
}


    $( function() {
    $.widget( "custom.combobox", {
      _create: function() {
        this.wrapper = $( "<span>" )
          .addClass( "custom-combobox" )
          .insertAfter( this.element );
 
        this.element.hide();
        this._createAutocomplete();
        this._createShowAllButton();
      },
 
      _createAutocomplete: function() {
        var selected = this.element.children( ":selected" ),
          value = selected.val() ? selected.text() : "";
 
        this.input = $( "<input>" )
          .appendTo( this.wrapper )
          .val( value )
          .attr( "title", "" )
          .addClass( "custom-combobox-input ui-widget ui-widget-content ui-state-default ui-corner-left" )
          .autocomplete({
            delay: 0,
            minLength: 0,
            source: $.proxy( this, "_source" )
          })
          .tooltip({
            classes: {
              "ui-tooltip": "ui-state-highlight"
            }
          });
 
        this._on( this.input, {
          autocompleteselect: function( event, ui ) {
            ui.item.option.selected = true;
            this._trigger( "select", event, {
              item: ui.item.option
            });
          },
 
          autocompletechange: "_removeIfInvalid"
        });
      },
 
      _createShowAllButton: function() {
        var input = this.input,
          wasOpen = false;
 
        $( "<a>" )
          .attr( "tabIndex", -1 )
          .attr( "title", "Show All Items" )
          .tooltip()
          .appendTo( this.wrapper )
          .button({
            icons: {
              primary: "ui-icon-triangle-1-s"
            },
            text: false
          })
          .removeClass( "ui-corner-all" )
          .addClass( "custom-combobox-toggle ui-corner-right" )
          .on( "mousedown", function() {
            wasOpen = input.autocomplete( "widget" ).is( ":visible" );
          })
          .on( "click", function() {
            input.trigger( "focus" );
 
            // Close if already visible
            if ( wasOpen ) {
              return;
            }
 
            // Pass empty string as value to search for, displaying all results
            input.autocomplete( "search", "" );
          });
      },
 
      _source: function( request, response ) {
        var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "gi");
        response( this.element.children( "option" ).map(function() {
            var text = $(this).text().replace(matcher, function(str) {
                return str 
            });
          if ( this.value && ( !request.term || matcher.test(text) ) )
            return {
              label: text,
              value: text,
              option: this
            };
        }) );
      },
 
      _removeIfInvalid: function( event, ui ) {
 
        // Selected an item, nothing to do
        if ( ui.item ) {
          return;
        }
 
        // Search for a match (case-insensitive)
        var value = this.input.val(),
          valueLowerCase = value.toLowerCase(),
          valid = false;
        this.element.children( "option" ).each(function() {
          if ( $( this ).text().toLowerCase() === valueLowerCase ) {
            this.selected = valid = true;
            return false;
          }
        });
 
        // Found a match, nothing to do
        if ( valid ) {
          return;
        }
 
        // Remove invalid value
        this.input
          .val( "" )
          .attr( "title", value + " didn't match any item" )
          .tooltip( "open" );
        this.element.val( "" );
        this._delay(function() {
          this.input.tooltip( "close" ).attr( "title", "" );
        }, 2500 );
        this.input.autocomplete( "instance" ).term = "";
      },
 
      _destroy: function() {
        this.wrapper.remove();
        this.element.show();
      }
    });
 
    $( "#combobox" ).combobox();
    $( "#toggle" ).on( "click", function() {
      $( "#combobox" ).toggle();
    });
  } );
    .ui-menu-item{
font-weight: bold
}
    <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  
<div class="ui-widget">
  <label>Your preferred programming language: </label>
  <select id="combobox">
    <option value="">Select one...</option>
    <option value="ActionScript">ActionScript</option>
    <option value="AppleScript">AppleScript</option>
    <option value="Asp">Asp</option>
    <option value="BASIC">BASIC</option>
    <option value="C">C</option>
    <option value="C++">C++</option>
    <option value="Clojure">Clojure</option>
    <option value="COBOL">COBOL</option>
    <option value="ColdFusion">ColdFusion</option>
    <option value="Erlang">Erlang</option>
    <option value="Fortran">Fortran</option>
    <option value="Groovy">Groovy</option>
    <option value="Haskell">Haskell</option>
    <option value="Java">Java</option>
    <option value="JavaScript">JavaScript</option>
    <option value="Lisp">Lisp</option>
    <option value="Perl">Perl</option>
    <option value="PHP">PHP</option>
    <option value="Python">Python</option>
    <option value="Ruby">Ruby</option>
    <option value="Scala">Scala</option>
    <option value="Scheme">Scheme</option>
  </select>
</div>

    选项 2.2 -你可以看到不同的主题

    你base现在有：

    <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">

    На данный момент темы для jQuery UI 1.12 (- base - black-tie - blitzer - cupertino - dark-hive - dot-luv - eggplant - excite-bike - flick - hot-sneaks - humanity - le-frog - mint-choc - overcast - pepper-grinder - redmond - smoothness - south-street - start sunny - swanky-purse - trontastic - ui-darkness - ui-lightness - vader)

    Вариант 2.3 - cами разработчики рекомендуют использовать CSS, это протестированный и отлаженный метод. Официальный сайт jquery-ui.

    Коротко основное:

    • Использовать дизайнер стилей
    • Изменить файл CSS jquery-ui.theme.css
    • Написать собственный файл

    Updated: после уточнения вопроса ответ был дополнен.

    Вы, кстати, очень близки были к одному из рабочих вариантов, потому как на официальном сайте нужный Вам Extension Points _renderItem( ul, item ) виджета Autocomplete Widget разбирался как раз в следующем пункте примеров Custom data and display
    Применим этот способ только при создании меню

    P.S.: для справки привожу пример (тут товарищ свою библиотеку написал, возможно пригодится для размышлений):

    EasyAutocomplete is a highly configurable jquery autocomplete plugin.
    GitHub
    Сайт проекта

    • 1

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