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Editing: jquery.matchHeight.js
/** * jquery-match-height master by @liabru * http://brm.io/jquery-match-height/ * License: MIT */ ;(function(factory) { // eslint-disable-line no-extra-semi 'use strict'; if (typeof define === 'function' && define.amd) { // AMD define(['jquery'], factory); } else if (typeof module !== 'undefined' && module.exports) { // CommonJS module.exports = factory(require('jquery')); } else { // Global factory(jQuery); } })(function($) { /* * internal */ var _previousResizeWidth = -1, _updateTimeout = -1; /* * _parse * value parse utility function */ var _parse = function(value) { // parse value and convert NaN to 0 return parseFloat(value) || 0; }; /* * _rows * utility function returns array of jQuery selections representing each row * (as displayed after float wrapping applied by browser) */ var _rows = function(elements) { var tolerance = 1, $elements = $(elements), lastTop = null, rows = []; // group elements by their top position $elements.each(function(){ var $that = $(this), top = $that.offset().top - _parse($that.css('margin-top')), lastRow = rows.length > 0 ? rows[rows.length - 1] : null; if (lastRow === null) { // first item on the row, so just push it rows.push($that); } else { // if the row top is the same, add to the row group if (Math.floor(Math.abs(lastTop - top)) <= tolerance) { rows[rows.length - 1] = lastRow.add($that); } else { // otherwise start a new row group rows.push($that); } } // keep track of the last row top lastTop = top; }); return rows; }; /* * _parseOptions * handle plugin options */ var _parseOptions = function(options) { var opts = { byRow: true, property: 'height', target: null, remove: false }; if (typeof options === 'object') { return $.extend(opts, options); } if (typeof options === 'boolean') { opts.byRow = options; } else if (options === 'remove') { opts.remove = true; } return opts; }; /* * matchHeight * plugin definition */ var matchHeight = $.fn.matchHeight = function(options) { var opts = _parseOptions(options); // handle remove if (opts.remove) { var that = this; // remove fixed height from all selected elements this.css(opts.property, ''); // remove selected elements from all groups $.each(matchHeight._groups, function(key, group) { group.elements = group.elements.not(that); }); // TODO: cleanup empty groups return this; } if (this.length <= 1 && !opts.target) { return this; } // keep track of this group so we can re-apply later on load and resize events matchHeight._groups.push({ elements: this, options: opts }); // match each element's height to the tallest element in the selection matchHeight._apply(this, opts); return this; }; /* * plugin global options */ matchHeight.version = 'master'; matchHeight._groups = []; matchHeight._throttle = 80; matchHeight._maintainScroll = false; matchHeight._beforeUpdate = null; matchHeight._afterUpdate = null; matchHeight._rows = _rows; matchHeight._parse = _parse; matchHeight._parseOptions = _parseOptions; /* * matchHeight._apply * apply matchHeight to given elements */ matchHeight._apply = function(elements, options) { var opts = _parseOptions(options), $elements = $(elements), rows = [$elements]; // take note of scroll position var scrollTop = $(window).scrollTop(), htmlHeight = $('html').outerHeight(true); // get hidden parents var $hiddenParents = $elements.parents().filter(':hidden'); // cache the original inline style $hiddenParents.each(function() { var $that = $(this); $that.data('style-cache', $that.attr('style')); }); // temporarily must force hidden parents visible $hiddenParents.css('display', 'block'); // get rows if using byRow, otherwise assume one row if (opts.byRow && !opts.target) { // must first force an arbitrary equal height so floating elements break evenly $elements.each(function() { var $that = $(this), display = $that.css('display'); // temporarily force a usable display value if (display !== 'inline-block' && display !== 'flex' && display !== 'inline-flex') { display = 'block'; } // cache the original inline style $that.data('style-cache', $that.attr('style')); $that.css({ 'display': display, 'padding-top': '0', 'padding-bottom': '0', 'margin-top': '0', 'margin-bottom': '0', 'border-top-width': '0', 'border-bottom-width': '0', 'height': '100px', 'overflow': 'hidden' }); }); // get the array of rows (based on element top position) rows = _rows($elements); // revert original inline styles $elements.each(function() { var $that = $(this); $that.attr('style', $that.data('style-cache') || ''); }); } $.each(rows, function(key, row) { var $row = $(row), targetHeight = 0; if (!opts.target) { // skip apply to rows with only one item if (opts.byRow && $row.length <= 1) { $row.css(opts.property, ''); return; } // iterate the row and find the max height $row.each(function(){ var $that = $(this), style = $that.attr('style'), display = $that.css('display'); // temporarily force a usable display value if (display !== 'inline-block' && display !== 'flex' && display !== 'inline-flex') { display = 'block'; } // ensure we get the correct actual height (and not a previously set height value) var css = { 'display': display }; css[opts.property] = ''; $that.css(css); // find the max height (including padding, but not margin) if ($that.outerHeight(false) > targetHeight) { targetHeight = $that.outerHeight(false); } // revert styles if (style) { $that.attr('style', style); } else { $that.css('display', ''); } }); } else { // if target set, use the height of the target element targetHeight = opts.target.outerHeight(false); } // iterate the row and apply the height to all elements $row.each(function(){ var $that = $(this), verticalPadding = 0; // don't apply to a target if (opts.target && $that.is(opts.target)) { return; } // handle padding and border correctly (required when not using border-box) if ($that.css('box-sizing') !== 'border-box') { verticalPadding += _parse($that.css('border-top-width')) + _parse($that.css('border-bottom-width')); verticalPadding += _parse($that.css('padding-top')) + _parse($that.css('padding-bottom')); } // set the height (accounting for padding and border) $that.css(opts.property, (targetHeight - verticalPadding) + 'px'); }); }); // revert hidden parents $hiddenParents.each(function() { var $that = $(this); $that.attr('style', $that.data('style-cache') || null); }); // restore scroll position if enabled if (matchHeight._maintainScroll) { $(window).scrollTop((scrollTop / htmlHeight) * $('html').outerHeight(true)); } return this; }; /* * matchHeight._applyDataApi * applies matchHeight to all elements with a data-match-height attribute */ matchHeight._applyDataApi = function() { var groups = {}; // generate groups by their groupId set by elements using data-match-height $('[data-match-height], [data-mh]').each(function() { var $this = $(this), groupId = $this.attr('data-mh') || $this.attr('data-match-height'); if (groupId in groups) { groups[groupId] = groups[groupId].add($this); } else { groups[groupId] = $this; } }); // apply matchHeight to each group $.each(groups, function() { this.matchHeight(true); }); }; /* * matchHeight._update * updates matchHeight on all current groups with their correct options */ var _update = function(event) { if (matchHeight._beforeUpdate) { matchHeight._beforeUpdate(event, matchHeight._groups); } $.each(matchHeight._groups, function() { matchHeight._apply(this.elements, this.options); }); if (matchHeight._afterUpdate) { matchHeight._afterUpdate(event, matchHeight._groups); } }; matchHeight._update = function(throttle, event) { // prevent update if fired from a resize event // where the viewport width hasn't actually changed // fixes an event looping bug in IE8 if (event && event.type === 'resize') { var windowWidth = $(window).width(); if (windowWidth === _previousResizeWidth) { return; } _previousResizeWidth = windowWidth; } // throttle updates if (!throttle) { _update(event); } else if (_updateTimeout === -1) { _updateTimeout = setTimeout(function() { _update(event); _updateTimeout = -1; }, matchHeight._throttle); } }; /* * bind events */ // apply on DOM ready event $(matchHeight._applyDataApi); // use on or bind where supported var on = $.fn.on ? 'on' : 'bind'; // update heights on load and resize events $(window)[on]('load', function(event) { matchHeight._update(false, event); }); // throttled update heights on resize events $(window)[on]('resize orientationchange', function(event) { matchHeight._update(true, event); }); });
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