可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):

问题:

Hey, I am trying to create a search field that will filter or show/hide(which ever is best) the list elements based on what the user typed in and clicked the search button. I have no idea how to do this. everything I tried does not work unfortunately and im unsure of the best approach for this, like do i use show and hide or is there something better?

This is my HTML:

<html>
    <head>

    </head>
    <body>
    <label for="filter">Filter</label>  
    <input type="text" name="filter" value="" id="filter" />

        <a id="addtag" href="#">Search</a> 

    <ul>
        <li id="Hero1">Superman</li>
        <li id="Hero2">Batman</li>
        <li id="Hero3">Spiderman</li>
        <li id="Hero4">Iron Man</li>
        <li id="Hero5">The Hulk</li>
    </ul>

    </body>
</html>

So, if someone types in 'Superman' and clicks the search button, then only the Superman list element will be displayed.

Any help on this would be great. Thanks.

回答1:

This uses jQuery and creates a sliding animation, too. This would be the HTML:

<div id="wrap">
  <h1 id="header">List of countries</h1>
  <ul id="list">
    <li><a href="#">List Item</a></li>
            <li><a href="#">Add Unlimited Items</a></li>
</ul>
</div>

JavaScript

(function ($) {
  // custom css expression for a case-insensitive contains()
  jQuery.expr[':'].Contains = function(a,i,m){
      return (a.textContent || a.innerText || "").toUpperCase().indexOf(m[3].toUpperCase())>=0;
  };


  function listFilter(header, list) { // header is any element, list is an unordered list
    // create and add the filter form to the header
    var form = $("<form>").attr({"class":"filterform","action":"#"}),
        input = $("<input>").attr({"class":"filterinput","type":"text"});
    $(form).append(input).appendTo(header);

    $(input)
      .change( function () {
        var filter = $(this).val();
        if(filter) {
          // this finds all links in a list that contain the input,
          // and hide the ones not containing the input while showing the ones that do
          $(list).find("a:not(:Contains(" + filter + "))").parent().slideUp();
          $(list).find("a:Contains(" + filter + ")").parent().slideDown();
        } else {
      $(list).find("li").slideDown();
        }
        return false;
      })
    .keyup( function () {
        // fire the above change event after every letter
        $(this).change();
    });
  }


  //ondomready
  $(function () {
    listFilter($("#header"), $("#list"));
  });
}(jQuery));

CSS is optional. JSFiddle Demo: http://jsfiddle.net/4feug/

回答2:

You might be better off using a jQuery Search Plugin, like this one.

回答3:

Very basic version, but no need of plugins and it works:

$("#addtag").click(function(){
  $("ul li").hide()
  .filter(":contains('"+ $("#filter").val() +"')").show()
  return false;
})

回答4:

A little improvement to duckyflip's answer to make the search case-insensitive:

$.expr[":"].contains = $.expr.createPseudo(function(arg) {
    return function( elem ) {
        return $(elem).text().toUpperCase().indexOf(arg.toUpperCase()) >= 0;
    };
});

$("#addtag").click(function(){
    $("ul li").hide()
    .filter(":contains('"+ $("#filter").val() +"')").show()
    return false;
});