65 lines
2.3 KiB
JavaScript
65 lines
2.3 KiB
JavaScript
/*! Copyright (c) 2013 Brandon Aaron (http://brandonaaron.net)
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* Licensed under the MIT License (LICENSE.txt).
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*
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* Version 3.0.0
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*/
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(function (factory) {
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if (typeof define === 'function' && define.amd) {
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// AMD. Register as an anonymous module.
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define(['jquery'], factory);
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} else {
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// Browser globals
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factory(jQuery);
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}
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}(function ($) {
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$.fn.bgiframe = function(s) {
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s = $.extend({
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top : 'auto', // auto == borderTopWidth
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left : 'auto', // auto == borderLeftWidth
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width : 'auto', // auto == offsetWidth
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height : 'auto', // auto == offsetHeight
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opacity : true,
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src : 'javascript:false;',
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conditional : /MSIE 6.0/.test(navigator.userAgent) // expresion or function. return false to prevent iframe insertion
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}, s);
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// wrap conditional in a function if it isn't already
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if (!$.isFunction(s.conditional)) {
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var condition = s.conditional;
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s.conditional = function() { return condition; };
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}
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var $iframe = $('<iframe class="bgiframe"frameborder="0"tabindex="-1"src="'+s.src+'"'+
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'style="display:block;position:absolute;z-index:-1;"/>');
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return this.each(function() {
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var $this = $(this);
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if ( s.conditional(this) === false ) { return; }
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var existing = $this.children('iframe.bgiframe');
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var $el = existing.length === 0 ? $iframe.clone() : existing;
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$el.css({
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'top': s.top == 'auto' ?
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((parseInt($this.css('borderTopWidth'),10)||0)*-1)+'px' : prop(s.top),
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'left': s.left == 'auto' ?
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((parseInt($this.css('borderLeftWidth'),10)||0)*-1)+'px' : prop(s.left),
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'width': s.width == 'auto' ? (this.offsetWidth + 'px') : prop(s.width),
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'height': s.height == 'auto' ? (this.offsetHeight + 'px') : prop(s.height),
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'opacity': s.opacity === true ? 0 : undefined
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});
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if ( existing.length === 0 ) {
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$this.prepend($el);
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}
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});
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};
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// old alias
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$.fn.bgIframe = $.fn.bgiframe;
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function prop(n) {
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return n && n.constructor === Number ? n + 'px' : n;
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}
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}));
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