मैंने इस कार्य के लिए अपना स्वयं का jQuery प्लगइन बनाया है, आप इसे यहाँ आज़मा सकते हैं:
http://jsfiddle.net/Sk8erPeter/8NF4r/
आप कैरेक्टर काउंटर को फ्लाई पर बना सकते हैं (और कैरेक्टर काउंटर को भी शेष कर सकते हैं), आप परिभाषित कर सकते हैं कि क्या आप टेक्स्ट को काटना चाहते हैं, आप प्रत्यय ग्रंथों को परिभाषित कर सकते हैं और आप एक छोटे प्रारूप और इसके विभाजक को भी परिभाषित कर सकते हैं।
यहां एक उदाहरण का उपयोग किया गया है:
$(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
});
$('#second_textarea').characterCounter({
maximumCharacters: 25
});
});
यहाँ प्लगइन का कोड है:
/**
* Character counter and limiter plugin for textfield and textarea form elements
* @author Sk8erPeter
*/
(function ($) {
$.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);