javascript - 需要一次进行多个搜索，起始字符是自动完成中的搜索

Question

我正在使用https://jqueryui.com/autocomplete/#multiple我的网站中的自动完成功能。它工作正常，现在我想搜索仅添加到文本框的第一个字符的记录。

这是我的代码:

<link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css"><input type="text" id="multi"><script>$(document).ready(function() {var avail = [
    "ActionScript",
    "AppleScript",
    "Asp",
    "BASIC",
    "C",
    "C++",
];

$("#single").autocomplete({
    source:avail
});


 function split( val ) {
  return val.split( /,\s*/ );
}
function extractLast( term ) {
  return split( term ).pop();
}

$( "#multi" )
  // don't navigate away from the field on tab when selecting an item
  .bind( "keydown", function( event ) {
    if ( event.keyCode === $.ui.keyCode.TAB &&
        $( this ).autocomplete( "instance" ).menu.active ) {
      event.preventDefault();
    }
  })
  .autocomplete({
    minLength: 0,
    source: function( request, response ) {
      // delegate back to autocomplete, but extract the last term
      response( $.ui.autocomplete.filter(
        avail, extractLast( request.term ) ) );
    },
    focus: function() {
      // prevent value inserted on focus
      return false;
    },
    select: function( event, ui ) {
      var terms = split( this.value );
      // remove the current input
      terms.pop();
      // add the selected item
      terms.push( ui.item.value );
      // add placeholder to get the comma-and-space at the end
      terms.push( "" );
      this.value = terms.join( ", " );
      return false;
    }
  });});</script>

Answer 1

根据评论:

为了使 typeahead.js multipel search demo搜索“从第一个字符开始”，更改匹配的代码行:

~item.toLowerCase().indexOf(tquery.toLowerCase())

对此:

item.toLowerCase().indexOf(tquery.toLowerCase()) == 0

演示 fiddle :http://jsfiddle.net/BwDmM/1100/

附加说明:有关原始匹配代码如何工作(tilda 位运算符)的更多说明可以在这里找到:http://www.joezimjs.com/javascript/great-mystery-of-the-tilde/