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[jQuery] jQuery.textcomplete: Autocomplete for textarea, 자동완성

홍반장水_ 2013. 9. 12. 10:49

2013. 9. 12. 10:49

jQuery.textcomplete: Autocomplete for textarea

자동완성

Forms - jQuery/Added on September 11, 2013/Add to favorites

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jQuery.textcomplete is a jQuery plugin that adds an autocomplete feature to textareas, like the ones found in GitHub comment forms. It’s completely open source, released under the MIT license.

Homepage: http://yuku-t.com/jquery-textcomplete/
GitHub: https://github.com/yuku-t/jquery-textcomplete

Autocomplete for Textarea

Introduces autocompleting power to textareas, like a GitHub comment form has.

Demo.

How to use

Note: The key words "MUST", "SHOULD", and "MAY" in this document are to be interpreted as described in RFC 2119.

jQuery MUST be loaded ahead.

<script src="path/to/jquery.js"></script>
<script src="path/to/jquery.textcomplete.js"></script>

Then jQuery.fn.textcomplete is defined. The method MUST be called for textarea elements, and the receiver SHOULD include an element.

$('textarea').textcomplete(strategies);

The strategies is an Object not an Array. Each value is called a strategy object and the corresponding key is the name of the strategy.

var strategies = {
  // There are two strategies called 'foo' and 'bar.'
  // The plugin does not care these property names so you should use
  // meaningful names.
  foo: strategy,
  bar: otherStrategy
};

The strategy is an Object which MUST have match, search and replace and MAY have index, maxCount and template.

var strategy = {
  // Required
  match:    matchRegExp,
  search:   searchFunc,
  replace:  replaceFunc,

  // Optional
  index:    indexNumber,
  maxCount: maxCountNumber,
  template: templateFunc,
  cache:    cacheBoolean
}

The matchRegExp and indexNumber MUST be a RegExp and a Number respectively. matchRegExp MUST contain capturing groups and SHOULD end with $. indexNumber defaults to 2. The word captured by indexNumber-th group is going to be the term argument of searchFunc.

// Detect the word starting with '@' as a query term.
var matchRegExp = /(^|\s)@(\w*)$/;
var indexNumber = 2;

The searchFunc MUST be a Function which gets two arguments, term and callback. It MUST invoke callback with an Array of String. It is guaranteed that the function will be invoked exclusively even though it contains async call.

If you want to execute callback multiple times per a search, you SHOULD give true to the second argument while additional execution remains. This is useful to use data located at both local and remote. Note that you MUST invoke callback without truthy second argument at least once per a search.

The maxCountNumber MUST be a Number and default to 10. Even if searchFunc callbacks with large array, the array will be truncated into maxCountNumber elements.

The cacheBoolean MUST be a Boolean. It defaults to false. If it is true the searchFunc will be memoized by term argument. This is useful to prevent excessive API access.

var searchFunc = function (term, callback) {
  // Show local cache immediately.
  callback(cache[term], true);

  $.getJSON('/search', { q: term })
    .done(function (resp) {
      // Resp must be an Array of String such as:
      //   ['hello', 'world']
      callback(resp);
    })
    .fail(function () {
      // Callback must be invoked even if something went wrong.
      callback([]);
    });
};

The templateFunc MUST be a Function which gets and returns a string. The function is going to be called as an iteretor for the array given to the callback of searchFunc.

var templateFunc = function (value) {
  return '<b>' + value + '</b>';
};

The replaceFunc MUST be a Function which gets and returns a string. It is going to be invoked when a user will click and select an item of autocomplete dropdown.

var replaceFunc = function (value) { return '$1@' + value + ' '; };

The result is going to be used to replace the textarea's text content using String.prototype.replace with matchRegExp:

textarea.value = textarea.value.replace(matchRegExp, replaceFunc(value));

Example

var emojies = ['+1', '-1', 'dog', 'cat'];

$('textarea').textcomplete({
  // mention strategy
  mention: {
    match: /(^|\s)@(\w*)$/,
    search: function (term, callback) {
      callback(cache[term], true);
      $.getJSON('/search', { q: term })
        .done(function (resp) { callback(resp); })
        .fail(function ()     { callback([]);   });
    },
    replace: function (value) {
      return '$1@' + value + ' ';
    },
    cache: true
  },

  // emoji strategy
  emoji: {
    match: /(^|\s):(\w*)$/,
    search: function (term, callback) {
      var regexp = new RegExp('^' + term);
      callback($.map(emojies, function (emoji) {
        return regexp.test(emoji) ? emoji : nil;
      }));
    },
    replace: function (value) {
      return '$1:' + value + ': ';
    }
  }
});

Style

The HTML generated by jquery-textcomplete is compatible with Bootstrap's dropdown. So all Bootstrap oriented css files are available.

This repository also includes jquery.autocomplete.css. It is useful to be used as the starting point.

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jQuery

jQuery.textcomplete: Autocomplete for textarea

How to use

Example

Style

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