我有这张桌子：
<style>
table thead tr { background-color: #D5D5D5 ; font-size:9pt}
table tr.asmtHeader { background-color: #E3E3E3; }
table tr.dataRow td { text-align: center; vertical-align: top; }
table tr.dataRow:nth-child(odd) { background-color: #EFEFEF; }
</style>
<table>
<thead><tr><th></tr></thead>
<tr class="asmtHeader"><td></td></tr>
<tr class="dataRow"><td></td></tr>
<tr class="dataRow"><td>should be #EFEFEF</td></tr>
<tr class="dataRow"><td></td></tr>
<tr class="asmtHeader"><td></td></tr>
<tr class="dataRow"><td></td></tr>
<tr class="dataRow"><td>should be #EFEFEF</td></tr>
<tr class="dataRow"><td></td></tr>
<tr class="dataRow"><td>should be #EFEFEF</td></tr>
</table>
目标是斑马条纹只是类=＆＃34; dataRow＆＃34;，但总是从第一个上面的清除开始＃=＃34; asmtHeader＆＃34;。如果我删除＆tr;表tr.dataRow：nth-child（odd）＆＃39;样式并添加此行，它将排除asmtHeader，但不会重置偶数/奇数：
$("tr.dataRow:odd").css( {
"background": "#EFEFEF",
"text-align": "center",
"vertical-align": "top" });
有没有办法让偶数/奇数重置？
答案 0 :(得分：0)
我可以看到asmtHeader应该是一个表头，所以为什么不做它。你可以使用jquery搜索可以找到的第一个(function($, video, undefined) {
//default setting
var defaultSetting = {
markerStyle: {
'border-radius': '0%',
},
markerTip: {
display: true,
text: function(marker) {
return "Break: "+ marker.text;
},
time: function(marker) {
return marker.time;
}
},
breakOverlay:{
display: false,
displayTime: 3,
text: function(marker) {
return "Break overlay: " + marker.overlayText;
},
style: {
'width':'100%',
'height': '20%',
'background-color': 'rgba(0,0,0,0.7)',
'color': 'white',
'font-size': '17px'
}
},
onMarkerClick: function(marker) {},
onMarkerReached: function(marker) {},
markers: []
};
// create a non-colliding random number
function generateUUID() {
var d = new Date().getTime();
var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = (d + Math.random()*16)%16 | 0;
d = Math.floor(d/16);
return (c=='x' ? r : (r&0x3|0x8)).toString(16);
});
return uuid;
};
function registerVideoJsMarkersPlugin(options) {
/**
* register the markers plugin (dependent on jquery)
*/
var setting = $.extend(true, {}, defaultSetting, options),
markersMap = {},
markersList = [], // list of markers sorted by time
videoWrapper = $(this.el()),
currentMarkerIndex = -1,
player = this,
markerTip = null,
breakOverlay = null,
overlayIndex = -1;
function sortMarkersList() {
// sort the list by time in asc order
markersList.sort(function(a, b){
return setting.markerTip.time(a) - setting.markerTip.time(b);
});
}
function addMarkers(newMarkers) {
// create the markers
$.each(newMarkers, function(index, marker) {
//console.log(index);
// console.log(marker);
marker.key = generateUUID();
//console.log(marker.key);
videoWrapper.find('.vjs-progress-control').append(
createMarkerDiv(marker));
// store marker in an internal hash map
markersMap[marker.key] = marker;
console.log(markersMap);
markersList.push(marker);
});
sortMarkersList();
}
function getPosition(marker){
return (setting.markerTip.time(marker) / player.duration()) * 100
}
function createMarkerDiv(marker, duration) {
var markerDiv = $("<div class='vjs-marker'></div>");
console.log(marker.length);
markerDiv.css(setting.markerStyle)
.css({"margin-left" : -parseFloat(markerDiv.css("width"))/2 + 'px',
"left" : getPosition(marker) + '%', })
.attr("data-marker-key", marker.key)
.attr("data-marker-time", setting.markerTip.time(marker));
console.log(setting.markerTip.time(marker));
// add user-defined class to marker
if (marker.class) {
markerDiv.addClass(marker.class);
}
// bind click event to seek to marker time
markerDiv.on('click', function(e) {
var preventDefault = false;
if (typeof setting.onMarkerClick === "function") {
// if return false, prevent default behavior
preventDefault = setting.onMarkerClick(marker) == false;
}
if (!preventDefault) {
var key = $(this).data('marker-key');
player.currentTime(setting.markerTip.time(markersMap[key]));
}
});
if (setting.markerTip.display) {
registerMarkerTipHandler(markerDiv);
}
return markerDiv;
}
function updateMarkers() {
// update UI for markers whose time changed
for (var i = 0; i< markersList.length; i++) {
var marker = markersList[i];
var markerDiv = videoWrapper.find(".vjs-marker[data-marker-key='" + marker.key +"']");
var markerTime = setting.markerTip.time(marker);
if (markerDiv.data('marker-time') != markerTime) {
markerDiv.css({"left": getPosition(marker) + '%'})
.attr("data-marker-time", markerTime);
}
}
sortMarkersList();
}
function removeMarkers(indexArray) {
// reset overlay
if (breakOverlay){
overlayIndex = -1;
breakOverlay.css("visibility", "hidden");
}
currentMarkerIndex = -1;
for (var i = 0; i < indexArray.length; i++) {
var index = indexArray[i];
var marker = markersList[index];
if (marker) {
// delete from memory
delete markersMap[marker.key];
markersList[index] = null;
// delete from dom
videoWrapper.find(".vjs-marker[data-marker-key='" + marker.key +"']").remove();
}
}
// clean up array
for (var i = markersList.length - 1; i >=0; i--) {
if (markersList[i] === null) {
markersList.splice(i, 1);
}
}
// sort again
sortMarkersList();
}
// attach hover event handler
function registerMarkerTipHandler(markerDiv) {
markerDiv.on('mouseover', function(){
var marker = markersMap[$(this).data('marker-key')];
markerTip.find('.vjs-tip-inner').text(setting.markerTip.text(marker));
// margin-left needs to minus the padding length to align correctly with the marker
markerTip.css({"left" : getPosition(marker) + '%',
"margin-left" : -parseFloat(markerTip.css("width"))/2 - 5 + 'px',
"visibility" : "visible"});
}).on('mouseout',function(){
markerTip.css("visibility", "hidden");
});
}
function initializeMarkerTip() {
markerTip = $("<div class='vjs-tip'><div class='vjs-tip-arrow'></div><div class='vjs-tip-inner'></div></div>");
videoWrapper.find('.vjs-progress-control').append(markerTip);
}
// show or hide break overlays
function updateBreakOverlay() {
if(!setting.breakOverlay.display || currentMarkerIndex < 0){
return;
}
var currentTime = player.currentTime();
var marker = markersList[currentMarkerIndex];
var markerTime = setting.markerTip.time(marker);
if (currentTime >= markerTime &&
currentTime <= (markerTime + setting.breakOverlay.displayTime)) {
if (overlayIndex != currentMarkerIndex){
overlayIndex = currentMarkerIndex;
breakOverlay.find('.vjs-break-overlay-text').html(setting.breakOverlay.text(marker));
}
breakOverlay.css('visibility', "visible");
} else {
overlayIndex = -1;
breakOverlay.css("visibility", "hidden");
}
}
// problem when the next marker is within the overlay display time from the previous marker
function initializeOverlay() {
breakOverlay = $("<div class='vjs-break-overlay'><div class='vjs-break-overlay-text'></div></div>")
.css(setting.breakOverlay.style);
videoWrapper.append(breakOverlay);
overlayIndex = -1;
}
function onTimeUpdate() {
onUpdateMarker();
updateBreakOverlay();
}
function onUpdateMarker() {
/*
check marker reached in between markers
the logic here is that it triggers a new marker reached event only if the player
enters a new marker range (e.g. from marker 1 to marker 2). Thus, if player is on marker 1 and user clicked on marker 1 again, no new reached event is triggered)
*/
var getNextMarkerTime = function(index) {
if (index < markersList.length - 1) {
return setting.markerTip.time(markersList[index + 1]);
}
// next marker time of last marker would be end of video time
return player.duration();
}
var currentTime = player.currentTime();
var newMarkerIndex;
if (currentMarkerIndex != -1) {
// check if staying at same marker
var nextMarkerTime = getNextMarkerTime(currentMarkerIndex);
if(currentTime >= setting.markerTip.time(markersList[currentMarkerIndex]) &&
currentTime < nextMarkerTime) {
return;
}
// check for ending (at the end current time equals player duration)
if (currentMarkerIndex === markersList.length -1 &&
currentTime === player.duration()) {
return;
}
}
// check first marker, no marker is selected
if (markersList.length > 0 &&
currentTime < setting.markerTip.time(markersList[0])) {
newMarkerIndex = -1;
} else {
// look for new index
for (var i = 0; i < markersList.length; i++) {
nextMarkerTime = getNextMarkerTime(i);
if(currentTime >= setting.markerTip.time(markersList[i]) &&
currentTime < nextMarkerTime) {
newMarkerIndex = i;
break;
}
}
}
// set new marker index
if (newMarkerIndex != currentMarkerIndex) {
// trigger event
if (newMarkerIndex != -1 && options.onMarkerReached) {
options.onMarkerReached(markersList[newMarkerIndex]);
}
currentMarkerIndex = newMarkerIndex;
}
}
// setup the whole thing
function initialize() {
if (setting.markerTip.display) {
initializeMarkerTip();
}
// remove existing markers if already initialized
player.markers.removeAll();
addMarkers(options.markers);
if (setting.breakOverlay.display) {
initializeOverlay();
}
onTimeUpdate();
player.on("timeupdate", onTimeUpdate);
}
// setup the plugin after we loaded video's meta data
player.on("loadedmetadata", function() {
initialize();
});
// exposed plugin API
player.markers = {
getMarkers: function() {
return markersList;
},
next : function() {
// go to the next marker from current timestamp
var currentTime = player.currentTime();
for (var i = 0; i < markersList.length; i++) {
var markerTime = setting.markerTip.time(markersList[i]);
if (markerTime > currentTime) {
player.currentTime(markerTime);
break;
}
}
},
prev : function() {
// go to previous marker
var currentTime = player.currentTime();
for (var i = markersList.length - 1; i >=0 ; i--) {
var markerTime = setting.markerTip.time(markersList[i]);
// add a threshold
if (markerTime + 0.5 < currentTime) {
player.currentTime(markerTime);
break;
}
}
},
add : function(newMarkers) {
// add new markers given an array of index
addMarkers(newMarkers);
},
remove: function(indexArray) {
// remove markers given an array of index
removeMarkers(indexArray);
},
removeAll: function(){
var indexArray = [];
for (var i = 0; i < markersList.length; i++) {
indexArray.push(i);
}
removeMarkers(indexArray);
},
updateTime: function(){
// notify the plugin to update the UI for changes in marker times
updateMarkers();
},
reset: function(newMarkers){
// remove all the existing markers and add new ones
player.markers.removeAll();
addMarkers(newMarkers);
},
destroy: function(){
// unregister the plugins and clean up even handlers
player.markers.removeAll();
breakOverlay.remove();
markerTip.remove();
player.off("timeupdate", updateBreakOverlay);
delete player.markers;
},
};
}
videojs.plugin('markers', registerVideoJsMarkersPlugin);
})(jQuery, window.videojs);
并在下一个tr然后给出单独的类来复杂化再次搜索下一个asmtHeader（循环如此），但此解决方案使用css和js并且很复杂。
asmtHeader结构。您可以在http://jsfiddle.net/3MH9h/
找到该主题的示例