Bu görev için kendi jQuery eklentimi oluşturdum, buradan deneyebilirsiniz:
http://jsfiddle.net/Sk8erPeter/8NF4r/
Hareket halindeyken karakter sayaçları (ve ayrıca kalan karakter sayaçlarını) oluşturabilir, metni kesmek isteyip istemediğinizi tanımlayabilir, son ek metinlerini tanımlayabilir ve ayrıca kısa bir format ve onun ayırıcısını tanımlayabilirsiniz.
İşte örnek bir kullanım:
$(document).ready(function () {
$('#first_textfield').characterCounter();
$('#second_textfield').characterCounter({
maximumCharacters: 20,
chopText: true
});
$('#third_textfield').characterCounter({
maximumCharacters: 20,
shortFormat: true,
shortFormatSeparator: " / ",
positionBefore: true,
chopText: true
});
$('#fourth_textfield').characterCounter({
maximumCharacters: 20,
characterCounterNeeded: true,
charactersRemainingNeeded: true,
chopText: false
});
$('#first_textarea').characterCounter({
maximumCharacters: 50,
characterCounterNeeded: true,
charactersRemainingNeeded: false,
chopText: true
});
$('#second_textarea').characterCounter({
maximumCharacters: 25
});
});
İşte eklentinin kodu:
/**
* Character counter and limiter plugin for textfield and textarea form elements
* @author Sk8erPeter
*/
(function ($) {
$.fn.characterCounter = function (params) {
// merge default and user parameters
params = $.extend({
// define maximum characters
maximumCharacters: 1000,
// create typed character counter DOM element on the fly
characterCounterNeeded: true,
// create remaining character counter DOM element on the fly
charactersRemainingNeeded: true,
// chop text to the maximum characters
chopText: false,
// place character counter before input or textarea element
positionBefore: false,
// class for limit excess
limitExceededClass: "character-counter-limit-exceeded",
// suffix text for typed characters
charactersTypedSuffix: " characters typed",
// suffix text for remaining characters
charactersRemainingSuffixText: " characters left",
// whether to use the short format (e.g. 123/1000)
shortFormat: false,
// separator for the short format
shortFormatSeparator: "/"
}, params);
// traverse all nodes
this.each(function () {
var $this = $(this),
$pluginElementsWrapper,
$characterCounterSpan,
$charactersRemainingSpan;
// return if the given element is not a textfield or textarea
if (!$this.is("input[type=text]") && !$this.is("textarea")) {
return this;
}
// create main parent div
if (params.characterCounterNeeded || params.charactersRemainingNeeded) {
// create the character counter element wrapper
$pluginElementsWrapper = $('<div>', {
'class': 'character-counter-main-wrapper'
});
if (params.positionBefore) {
$pluginElementsWrapper.insertBefore($this);
} else {
$pluginElementsWrapper.insertAfter($this);
}
}
if (params.characterCounterNeeded) {
$characterCounterSpan = $('<span>', {
'class': 'counter character-counter',
'text': 0
});
if (params.shortFormat) {
$characterCounterSpan.appendTo($pluginElementsWrapper);
var $shortFormatSeparatorSpan = $('<span>', {
'html': params.shortFormatSeparator
}).appendTo($pluginElementsWrapper);
} else {
// create the character counter element wrapper
var $characterCounterWrapper = $('<div>', {
'class': 'character-counter-wrapper',
'html': params.charactersTypedSuffix
});
$characterCounterWrapper.prepend($characterCounterSpan);
$characterCounterWrapper.appendTo($pluginElementsWrapper);
}
}
if (params.charactersRemainingNeeded) {
$charactersRemainingSpan = $('<span>', {
'class': 'counter characters-remaining',
'text': params.maximumCharacters
});
if (params.shortFormat) {
$charactersRemainingSpan.appendTo($pluginElementsWrapper);
} else {
// create the character counter element wrapper
var $charactersRemainingWrapper = $('<div>', {
'class': 'characters-remaining-wrapper',
'html': params.charactersRemainingSuffixText
});
$charactersRemainingWrapper.prepend($charactersRemainingSpan);
$charactersRemainingWrapper.appendTo($pluginElementsWrapper);
}
}
$this.keyup(function () {
var typedText = $this.val();
var textLength = typedText.length;
var charactersRemaining = params.maximumCharacters - textLength;
// chop the text to the desired length
if (charactersRemaining < 0 && params.chopText) {
$this.val(typedText.substr(0, params.maximumCharacters));
charactersRemaining = 0;
textLength = params.maximumCharacters;
}
if (params.characterCounterNeeded) {
$characterCounterSpan.text(textLength);
}
if (params.charactersRemainingNeeded) {
$charactersRemainingSpan.text(charactersRemaining);
if (charactersRemaining <= 0) {
if (!$charactersRemainingSpan.hasClass(params.limitExceededClass)) {
$charactersRemainingSpan.addClass(params.limitExceededClass);
}
} else {
$charactersRemainingSpan.removeClass(params.limitExceededClass);
}
}
});
});
// allow jQuery chaining
return this;
};
})(jQuery);