我有一些 JavaScrip，用于检查是否选择了任何媒体标签或行业标签 - 这样投资组合项目就可以在浏览器中进行相应的排序和显示。
我所拥有的几乎 100% 有效，但我不知道如何制作它，以便如果仅选择媒体标签或仅选择行业标签，则投资组合项目仍应相应排序。目前，您必须选择媒体标签和行业标签，但我希望用户能够仅使用媒体标签或行业标签进行搜索。
这是我想要完成的任务:如果仅选择一个媒体标签，则获取与该媒体标签关联的所有投资组合片段。如果仅选择行业标签，则获取与该行业标签关联的所有组合项目。如果同时选择媒体标签和行业标签，则获取与两者关联的所有组合项目。
Vanilla JS 不是我的强项，所以请原谅我，如果这是一个愚蠢的问题，但这已经让我困惑了几个小时。
请不要使用 jQuery 答案，因为整个页面的功能是使用 JavaScript 构建的。
这是函数:
var update = function () {
closeDrawer();
// update ui to reflect tag changes
// get our list of items to display
var itemsToDisplay = [];
var currentMediaTag = controlsContainer.querySelector('.media.selected');
var currentIndustryTag = controlsContainer.querySelector('.industry.selected');
if (currentMediaTag != "" && currentMediaTag != null) {
selectedMediaFilter = currentMediaTag.innerHTML;
}
if (currentIndustryTag != "" && currentIndustryTag != null) {
selectedIndustryFilter = currentIndustryTag.innerHTML;
}
if (selectedMediaFilter == "" && selectedIndustryFilter == "") {
itemsToDisplay = portfolioItems.filter(function (item) {
return item.preferred;
});
} else {
itemsToDisplay = portfolioItems.filter(function (item) {
var mediaTags = item.media_tags,
industryTags = item.industry_tags;
if(industryTags.indexOf(selectedIndustryFilter) < 0){
return false;
}
else if(mediaTags.indexOf(selectedMediaFilter) < 0){
return false;
}
else{
return true;
}
});
}
renderItems(itemsToDisplay);
}
不完全确定这是必要的，但以防万一，这里是处理投资组合页面的完整 JS 文件:
(function ($) {
document.addEventListener("DOMContentLoaded", function (event) {
// for portfolio interaction
var portfolioGrid = (function () {
var gridSize = undefined,
parentContainer = document.querySelector('.portfolio-item-container');
containers = parentContainer.querySelectorAll('.view'),
drawer = parentContainer.querySelector('.drawer'),
bannerContainer = drawer.querySelector('.banner-container'),
thumbsContainer = drawer.querySelector('.thumbs-container'),
descriptionContainer = drawer.querySelector('.client-description'),
clientNameContainer = drawer.querySelector('.client-name'),
controlsContainer = document.querySelector('.portfolio-controls-container'),
selectedMediaFilter = "", selectedIndustryFilter = "";
var setGridSize = function () {
var windowSize = window.innerWidth,
previousGridSize = gridSize;
if (windowSize > 1800) {
gridSize = 5;
} else if (windowSize > 900) {
gridSize = 4;
} else if (windowSize > 600 && windowSize <= 900) {
gridSize = 3;
} else {
gridSize = 2;
}
if (previousGridSize != gridSize) {
closeDrawer();
}
};
var attachResize = function () {
window.onresize = function () {
setGridSize();
};
};
var getRowClicked = function (boxNumber) {
return Math.ceil(boxNumber / gridSize);
};
var getLeftSibling = function (row) {
var cI = row * gridSize;
return containers[cI >= containers.length ? containers.length - 1 : cI];
};
var openDrawer = function () {
drawer.className = 'drawer';
scrollToBanner();
};
var scrollToBanner = function () {
var mainContainer = document.querySelector('#main-container'),
mainBounding = mainContainer.getBoundingClientRect(),
scrollY = (drawer.offsetTop - mainBounding.bottom) - 10,
currentTop = document.body.getBoundingClientRect().top;
animate(document.body, "scrollTop", "", document.body.scrollTop, scrollY, 200, true);
};
var animate = function (elem, style, unit, from, to, time, prop) {
if (!elem) return;
var start = new Date().getTime(),
timer = setInterval(function () {
var step = Math.min(1, (new Date().getTime() - start) / time);
if (prop) {
elem[style] = (from + step * (to - from)) + unit;
} else {
elem.style[style] = (from + step * (to - from)) + unit;
}
if (step == 1) clearInterval(timer);
}, 25);
elem.style[style] = from + unit;
}
var closeDrawer = function () {
drawer.className = 'drawer hidden';
};
var cleanDrawer = function () {
bannerContainer.innerHTML = "";
clientNameContainer.innerHTML = "";
descriptionContainer.innerHTML = "";
thumbsContainer.innerHTML = "";
};
var resetThumbs = function () {
Array.prototype.forEach.call(thumbsContainer.querySelectorAll('.thumb'), function (t) {
t.className = "thumb";
});
};
var handleBannerItem = function (item) {
bannerContainer.innerHTML = "";
if (item.youtube) {
var videoContainer = document.createElement('div'),
iframe = document.createElement('iframe');
videoContainer.className = "videowrapper";
iframe.className = "youtube-video";
iframe.src = "https://youtube.com/embed/" + item.youtube;
videoContainer.appendChild(iframe);
bannerContainer.appendChild(videoContainer);
} else if (item.soundcloud) {
var iframe = document.createElement('iframe');
iframe.src = item.soundcloud;
iframe.className = "soundcloud-embed";
bannerContainer.appendChild(iframe);
} else if (item.banner) {
var bannerImage = document.createElement('img');
bannerImage.src = item.banner;
bannerContainer.appendChild(bannerImage);
}
};
var attachClick = function () {
Array.prototype.forEach.call(containers, function (n, i) {
n.querySelector('a.info').addEventListener('click', function (e) {
e.preventDefault();
});
n.addEventListener('click', function (e) {
var boxNumber = i + 1,
row = getRowClicked(boxNumber);
var containerIndex = row * gridSize;
if (containerIndex >= containers.length) {
// we're inserting drawer at the end
parentContainer.appendChild(drawer);
} else {
// we're inserting drawer in the middle somewhere
var leftSiblingNode = getLeftSibling(row);
leftSiblingNode.parentNode.insertBefore(drawer, leftSiblingNode);
}
// populate
cleanDrawer();
var mediaFilterSelected = document.querySelector('.media-tags .tag-container .selected');
var selectedFilters = "";
if (mediaFilterSelected != "" && mediaFilterSelected != null) {
selectedFilters = mediaFilterSelected.innerHTML;
}
var portfolioItemName = '';
var selectedID = this.getAttribute('data-portfolio-item-id');
var data = portfolioItems.filter(function (item) {
portfolioItemName = item.name;
return item.id === selectedID;
})[0];
clientNameContainer.innerHTML = data.name;
descriptionContainer.innerHTML = data.description;
var childItems = data.child_items;
//We will group the child items by media tag and target the unique instance from each group to get the right main banner
Array.prototype.groupBy = function (prop) {
return this.reduce(function (groups, item) {
var val = item[prop];
groups[val] = groups[val] || [];
groups[val].push(item);
return groups;
}, {});
}
var byTag = childItems.groupBy('media_tags');
if (childItems.length > 0) {
handleBannerItem(childItems[0]);
var byTagValues = Object.values(byTag);
byTagValues.forEach(function (tagValue) {
for (var t = 0; t < tagValue.length; t++) {
if (tagValue[t].media_tags == selectedFilters) {
handleBannerItem(tagValue[0]);
}
}
});
childItems.forEach(function (item, i) {
var img = document.createElement('img'),
container = document.createElement('div'),
label = document.createElement('p');
container.appendChild(img);
var mediaTags = item.media_tags;
container.className = "thumb";
label.className = "childLabelInactive thumbLbl";
thumbsContainer.appendChild(container);
if (selectedFilters.length > 0 && mediaTags.length > 0) {
for (var x = 0; x < mediaTags.length; x++) {
if (mediaTags[x] == selectedFilters) {
container.className = "thumb active";
label.className = "childLabel thumbLbl";
}
}
}
else {
container.className = i == 0 ? "thumb active" : "thumb";
}
img.src = item.thumb;
if (item.media_tags != 0 && item.media_tags != null) {
childMediaTags = item.media_tags;
childMediaTags.forEach(function (cMTag) {
varLabelTxt = document.createTextNode(cMTag);
container.appendChild(label);
label.appendChild(varLabelTxt);
});
}
img.addEventListener('click', function (e) {
scrollToBanner();
resetThumbs();
handleBannerItem(item);
container.className = "thumb active";
});
});
}
openDrawer();
});
});
};
var preloadImages = function () {
portfolioItems.forEach(function (item) {
var childItems = item.child_items;
childItems.forEach(function (child) {
(new Image()).src = child.banner;
(new Image()).src = child.thumb;
});
});
};
//////////////////////////////////// UPDATE FUNCTION /////////////////////////////////////
var update = function () {
closeDrawer();
// update ui to reflect tag changes
// get our list of items to display
var itemsToDisplay = [];
var currentMediaTag = controlsContainer.querySelector('.media.selected');
var currentIndustryTag = controlsContainer.querySelector('.industry.selected');
if (currentMediaTag != "" && currentMediaTag != null) {
selectedMediaFilter = currentMediaTag.innerHTML;
}
if (currentIndustryTag != "" && currentIndustryTag != null) {
selectedIndustryFilter = currentIndustryTag.innerHTML;
}
if (selectedMediaFilter == "" && selectedIndustryFilter == "") {
itemsToDisplay = portfolioItems.filter(function (item) {
return item.preferred;
});
} else {
itemsToDisplay = portfolioItems.filter(function (item) {
var mediaTags = item.media_tags,
industryTags = item.industry_tags;
if (industryTags.indexOf(selectedIndustryFilter) < 0) {
return false;
}
else if (mediaTags.indexOf(selectedMediaFilter) < 0) {
return false;
}
else {
return true;
}
});
}
renderItems(itemsToDisplay);
}
//////////////////////////////////// RENDERITEMS FUNCTION /////////////////////////////////////
var renderItems = function (items) {
var children = parentContainer.querySelectorAll('.view');
Array.prototype.forEach.call(children, function (child) {
// remove all event listeners then remove child
parentContainer.removeChild(child);
});
items.forEach(function (item) {
var container = document.createElement('div'),
thumb = document.createElement('img'),
mask = document.createElement('div'),
title = document.createElement('h6'),
excerpt = document.createElement('p'),
link = document.createElement('a');
container.className = "view view-tenth";
container.setAttribute('data-portfolio-item-id', item.id);
thumb.src = item.thumb;
mask.className = "mask";
title.innerHTML = item.name;
excerpt.innerHTML = item.excerpt;
link.href = "#";
link.className = "info";
link.innerHTML = "View Work";
container.appendChild(thumb);
container.appendChild(mask);
mask.appendChild(title);
mask.appendChild(excerpt);
mask.appendChild(link);
parentContainer.insertBefore(container, drawer);
});
containers = parentContainer.querySelectorAll('.view');
attachClick();
};
var filterHandler = function (linkNode, tagType) {
var prevSelection = document.querySelector("." + tagType + '.selected');
if (prevSelection != "" && prevSelection != null) {
prevSelection.className = tagType + ' tag';
}
linkNode.className = tagType + ' tag selected';
update();
};
var clearFilters = function (nodeList, filterType) {
Array.prototype.forEach.call(nodeList, function (node) {
node.className = filterType + " tag";
console.log("Clear filters function called");
});
}
var attachFilters = function () {
var mediaFilters = controlsContainer.querySelectorAll('.tag.media'),
industryFilters = controlsContainer.querySelectorAll('.tag.industry'),
filterToggle = controlsContainer.querySelectorAll('.filter-toggle');
// resets
controlsContainer.querySelector('.media-tags .reset')
.addEventListener('click',
function (e) {
e.preventDefault();
selectedMediaFilter = "";
clearFilters(controlsContainer.querySelectorAll('.media-tags a.tag'), "media");
update();
}
);
controlsContainer.querySelector('.industry-tags .reset')
.addEventListener('click',
function (e) {
e.preventDefault();
selectedIndustryFilter = "";
clearFilters(controlsContainer.querySelectorAll('.industry-tags a.tag'), "industry");
update();
}
);
Array.prototype.forEach.call(filterToggle, function (toggle) {
toggle.addEventListener('click', function (e) {
if (controlsContainer.className.indexOf('open') < 0) {
controlsContainer.className += ' open';
} else {
controlsContainer.className = controlsContainer.className.replace('open', '');
}
});
});
//Attaches a click event to each media tag "button"
Array.prototype.forEach.call(mediaFilters, function (filter) {
filter.addEventListener('click', function (e) {
e.preventDefault();
// var selectedMediaFilter = controlsContainer.querySelector('.media.selected');
//console.log("Media tag: " +this.innerHTML); *THIS WORKS*
filterHandler(this, "media");
});
});
Array.prototype.forEach.call(industryFilters, function (filter) {
filter.addEventListener('click', function (e) {
e.preventDefault();
// var selectedIndustryFilter = this.querySelector('.industry.selected');
// console.log("Industry tag: " +this.innerHTML); *THIS WORKS*
filterHandler(this, "industry");
});
});
};
return {
init: function () {
setGridSize();
attachResize();
attachClick();
preloadImages();
// portfolio page
if (controlsContainer) {
attachFilters();
}
}
};
})();
portfolioGrid.init();
});
}());
$ = jQuery.noConflict();
最佳答案
if(industryTags.indexOf(selectedIndustryFilter) < 0){
return false;
}
else if(mediaTags.indexOf(selectedMediaFilter) < 0){
return false;
}
这部分让你头疼。只要没有选择行业标签或媒体标签，就会退出该功能。
更改为:
if(industryTags.indexOf(selectedIndustryFilter) < 0 && mediaTags.indexOf(selectedMediaFilter) < 0){
return false;
}
现在它将测试是否至少选择了一个标签。如果是这样，则渲染项目。
关于JavaScript - 设置函数返回基于 1 或 2 个选定标签的所有项目(无 jQUERY)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45696316/