How to build a combobox component with fuzzy query function using jQuery

jQuery combobox Fuzzy query is a common form of search box. Users can enter keywords to search. Compared with precise search, fuzzy query is more convenient and faster. In this article, we will introduce how to use jQuery to build a combobox component with fuzzy query functionality.

1. Basic knowledge

To use jQuery combobox fuzzy query, you need to master the following basic knowledge:

1. jQuery

jQuery is A fast and concise JavaScript library that makes HTML document manipulation, event handling, animation effects, AJAX and other operations easier. Using jQuery can greatly simplify the complexity of JavaScript programming.

2. Combobox

Combobox is a component composed of a text box and a drop-down list box. The user can enter text or select items in the drop-down list. Among them, the text box is used to enter keywords, and the drop-down list is used to display search results.

3. Fuzzy query

Fuzzy query means that when the user enters a keyword, the system returns all search results that contain the keyword instead of matching the keyword exactly. search results.

2. Build jQuery Combobox fuzzy query

The following are the steps to build jQuery Combobox fuzzy query:

1. Introduce jQuery library

Introduce the jQuery library at the head of the page:

<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>

2. Create text boxes and drop-down lists

The HTML code is as follows:

<label for="search">Search:</label>
<input type="text" id="search">
<select id="results"></select>

3. Define JS functions

Add the following code to the end of the page:

$(function() {
  var availableResults = [
    "Result 1",
    "Result 2",
    "Result 3",
    "Result 4",
    "Result 5"
  ];
 
  $("#search").autocomplete({
    source: function(request, response) {
      var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "i");
      response($.grep(availableResults, function(item) {
        return matcher.test(item);
      }));
    }
  });
});

4. Page test

Open the page, enter keywords in the search box, and pull down The list will display all search results containing that keyword.

3. Complete code example

  
  
  
  <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
  
  <script>
  $( function() {
    var availableResults = [
      "Result 1",
      "Result 2",
      "Result 3",
      "Result 4",
      "Result 5"
    ];
    $( "#search" ).autocomplete({
      source: function( request, response ) {
        var matcher = new RegExp( $.ui.autocomplete.escapeRegex( request.term ), "i" );
        response( $.grep( availableResults, function( item ){
            return matcher.test( item );
        }) );
      }
    });
  } );
  </script>


 
<label for="search">Search:</label>
<input type="text" id="search">
<select id="results"></select>
 

Summary:

The above are all the steps to use jQuery to build Combobox fuzzy query. With the help of this technology, you can quickly develop a powerful search capability web application. At the same time, we also need to pay attention to ensuring the query efficiency and accuracy of database data to achieve a better user experience.

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