47 lines
1.4 KiB
JavaScript
47 lines
1.4 KiB
JavaScript
(function($) {
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/*
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* Auto-growing textareas; technique ripped from Facebook
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*/
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$.fn.autogrow = function(options) {
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this.filter('textarea').each(function() {
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var $this = $(this),
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minHeight = $this.height(),
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lineHeight = $this.css('lineHeight');
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var shadow = $('<div></div>').css({
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position: 'absolute',
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top: -10000,
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left: -10000,
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width: $(this).width(),
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fontSize: $this.css('fontSize'),
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fontFamily: $this.css('fontFamily'),
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lineHeight: $this.css('lineHeight'),
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resize: 'none'
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}).appendTo(document.body);
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var update = function() {
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var val = this.value.replace(/</g, '<')
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.replace(/>/g, '>')
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.replace(/&/g, '&')
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.replace(/\n/g, '<br/>');
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shadow.html(val);
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$(this).css('height', Math.max(shadow.height() + 20, minHeight));
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}
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$(this).change(update).keyup(update).keydown(update);
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update.apply(this);
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});
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return this;
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}
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})(jQuery); |