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How to Customize the Result Display Format in the Autocomplete Plugin?
How to Customize the Result Display Format in the Autocomplete Plugin?
Oct 21, 2024 am 08:07 AM
Customizing Result Display Format in Autocomplete Plugin
The jQuery UI Autocomplete plug-in provides a powerful way to handle user input and suggest relevant options. By default, the drop-down results display the matches of user input within the suggested items. However, you may desire a more customized format, such as highlighting the search characters in the displayed results.
Monkey-Patching the Plugin
To achieve this, you can employ the technique known as "monkey-patching," where you redefine an internal function within the library. In this case, you need to override the _renderItem function responsible for creating each item in the drop-down list.
Creating the Customized _renderItem Function
Here's an example of a customized _renderItem function:
$.ui.autocomplete.prototype._renderItem = function( ul, item) {
var re = new RegExp("^" + this.term);
var t = item.label.replace(re,"<span style='font-weight:bold;color:Blue;'>" + this.term + "</span>");
return $( "<li></li>" )
.data( "item.autocomplete", item )
.append( "<a>" + t + "</a>" )
.appendTo( ul );
};
This function uses a regular expression to isolate the matching characters and wraps them in an HTML span element with specific styling. The span element uses a bold font and a blue color to highlight the matches.
Applying the Patch
Once you have created the customized function, you can apply it to the Autocomplete widget by calling the following function within the document ready event:
monkeyPatchAutocomplete();
This function will replace the default _renderItem function with your customized version.
Preserving Character Case
Note that the above code highlights matches but does not preserve the case of the original input. To preserve the case, modify the replacement line within the _renderItem function as follows:
var t = item.label.replace(re,"<span style='font-weight:bold;color:Blue;'>" + "$&" + "</span>");
Targeted Patching
The above changes affect all Autocomplete widgets on the page. If you want to customize only a specific instance, refer to the question "How to patch just one instance of Autocomplete on a page?"
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