{"id":11383,"date":"2024-03-21T16:03:53","date_gmt":"2024-03-21T11:03:53","guid":{"rendered":"https:\/\/codehim.com\/?p=11383"},"modified":"2024-03-21T16:03:53","modified_gmt":"2024-03-21T11:03:53","slug":"collapsible-timeline-using-css3-and-vanilla-js","status":"publish","type":"post","link":"https:\/\/codehim.com\/vanilla-javascript\/collapsible-timeline-using-css3-and-vanilla-js\/","title":{"rendered":"Collapsible Timeline Using CSS3 and Vanilla JS"},"content":{"rendered":"

This code snippet helps you to create a collapsible timeline using CSS3 and Vanilla JS. It allows you to expand and collapse timeline items. The `itemAction` method manages the main functionality, which handles the expanding and collapsing of timeline items based on user interaction. It helps present chronological information in a visually organized and interactive manner.<\/p>\n

How to Create Collapsible Timeline Using CSS3 and Vanilla JS<\/h2>\n

1. First of all, load the Google Fonts<\/a> by adding the following CDN link into the head tag of your HTML document.<\/p>\n

<link rel='stylesheet' href='https:\/\/fonts.googleapis.com\/css2?family=IBM+Plex+Sans:wght@400;700&display=swap'><\/pre>\n
2. Set up the HTML structure for our timeline. We’ll need a container element for the timeline and individual elements for each timeline item. Each item will consist of a header and a body.<\/p>\n
<svg display=\"none\">\r\n\t<symbol id=\"arrow\">\r\n\t\t<polyline points=\"7 10,12 15,17 10\" fill=\"none\" stroke=\"currentcolor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\" \/>\r\n\t<\/symbol>\r\n<\/svg>\r\n<h1>A Brief History of Unix Time<\/h1>\r\n<div id=\"timeline\" class=\"timeline\">\r\n\t<div class=\"btn-group\">\r\n\t\t<button class=\"btn\" type=\"button\" data-action=\"expand\">Expand All<\/button>\r\n\t\t<button class=\"btn\" type=\"button\" data-action=\"collapse\">Collapse All<\/button>\r\n\t<\/div>\r\n\t<div class=\"timeline__item\">\r\n\t\t<div class=\"timeline__item-header\">\r\n\t\t\t<button class=\"timeline__arrow\" type=\"button\" id=\"item1\" aria-labelledby=\"item1-name\" aria-expanded=\"false\" aria-controls=\"item1-ctrld\" aria-haspopup=\"true\" data-item=\"1\">\r\n\t\t\t\t<svg class=\"timeline__arrow-icon\" viewBox=\"0 0 24 24\" width=\"24px\" height=\"24px\">\r\n\t\t\t\t\t<use href=\"#arrow\" \/>\r\n\t\t\t\t<\/svg>\r\n\t\t\t<\/button>\r\n\t\t\t<span class=\"timeline__dot\"><\/span>\r\n\t\t\t<span id=\"item1-name\" class=\"timeline__meta\">\r\n\t\t\t\t<time class=\"timeline__date\" datetime=\"1970-01-01\">January 1, 1970<\/time><br>\r\n\t\t\t\t<strong class=\"timeline__title\">Unix Epoch<\/strong>\r\n\t\t\t<\/span>\r\n\t\t<\/div>\r\n\t\t<div class=\"timeline__item-body\" id=\"item1-ctrld\" role=\"region\" aria-labelledby=\"item1\" aria-hidden=\"true\">\r\n\t\t\t<div class=\"timeline__item-body-content\">\r\n\t\t\t\t<p class=\"timeline__item-p\">This is the day the Unix clock began (or <time datetime=\"1969-12-31\">December 31, 1969<\/time> if you live behind UTC 😉).<\/p>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n\t<div class=\"timeline__item\">\r\n\t\t<div class=\"timeline__item-header\">\r\n\t\t\t<button class=\"timeline__arrow\" type=\"button\" id=\"item2\" aria-labelledby=\"item2-name\" aria-expanded=\"false\" aria-controls=\"item2-ctrld\" aria-haspopup=\"true\" data-item=\"2\">\r\n\t\t\t\t<svg class=\"timeline__arrow-icon\" viewBox=\"0 0 24 24\" width=\"24px\" height=\"24px\">\r\n\t\t\t\t\t<use href=\"#arrow\" \/>\r\n\t\t\t\t<\/svg>\r\n\t\t\t<\/button>\r\n\t\t\t<span class=\"timeline__dot\"><\/span>\r\n\t\t\t<span id=\"item2-name\" class=\"timeline__meta\">\r\n\t\t\t\t<time class=\"timeline__date\" datetime=\"1973-10-17\">October 17, 1973<\/time><br>\r\n\t\t\t\t<strong class=\"timeline__title\">Digits Within ISO 8601 Format<\/strong>\r\n\t\t\t<\/span>\r\n\t\t<\/div>\r\n\t\t<div class=\"timeline__item-body\" id=\"item2-ctrld\" role=\"region\" aria-labelledby=\"item2\" aria-hidden=\"true\">\r\n\t\t\t<div class=\"timeline__item-body-content\">\r\n\t\t\t\t<p class=\"timeline__item-p\">At 6:36:57 PM UTC, the date in ISO 8601 format (1973-10-17) within the time digits (119731017) appeared for the first time.<\/p>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n\t<div class=\"timeline__item\">\r\n\t\t<div class=\"timeline__item-header\">\r\n\t\t\t<button class=\"timeline__arrow\" type=\"button\" id=\"item3\" aria-labelledby=\"item3-name\" aria-expanded=\"false\" aria-controls=\"item3-ctrld\" aria-haspopup=\"true\" data-item=\"3\">\r\n\t\t\t\t<svg class=\"timeline__arrow-icon\" viewBox=\"0 0 24 24\" width=\"24px\" height=\"24px\">\r\n\t\t\t\t\t<use href=\"#arrow\" \/>\r\n\t\t\t\t<\/svg>\r\n\t\t\t<\/button>\r\n\t\t\t<span class=\"timeline__dot\"><\/span>\r\n\t\t\t<span id=\"item3-name\" class=\"timeline__meta\">\r\n\t\t\t\t<time class=\"timeline__date\" datetime=\"2001-09-09\">September 9, 2001<\/time><br>\r\n\t\t\t\t<strong class=\"timeline__title\">1 Billion Seconds<\/strong>\r\n\t\t\t<\/span>\r\n\t\t<\/div>\r\n\t\t<div class=\"timeline__item-body\" id=\"item3-ctrld\" role=\"region\" aria-labelledby=\"item3\" aria-hidden=\"true\">\r\n\t\t\t<div class=\"timeline__item-body-content\">\r\n\t\t\t\t<p class=\"timeline__item-p\">Unix time reached 1,000,000,000 seconds at 1:46:40 AM UTC. The Danish UNIX User Group celebrated this in Copenhagen, Denmark.<\/p>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n\t<div class=\"timeline__item\">\r\n\t\t<div class=\"timeline__item-header\">\r\n\t\t\t<button class=\"timeline__arrow\" type=\"button\" id=\"item4\" aria-labelledby=\"item4-name\" aria-expanded=\"false\" aria-controls=\"item4-ctrld\" aria-haspopup=\"true\" data-item=\"4\">\r\n\t\t\t\t<svg class=\"timeline__arrow-icon\" viewBox=\"0 0 24 24\" width=\"24px\" height=\"24px\">\r\n\t\t\t\t\t<use href=\"#arrow\" \/>\r\n\t\t\t\t<\/svg>\r\n\t\t\t<\/button>\r\n\t\t\t<span class=\"timeline__dot\"><\/span>\r\n\t\t\t<span id=\"item4-name\" class=\"timeline__meta\">\r\n\t\t\t\t<time class=\"timeline__date\" datetime=\"2009-02-13\">February 13, 2009<\/time><br>\r\n\t\t\t\t<strong class=\"timeline__title\">1,234,567,890 Seconds<\/strong>\r\n\t\t\t<\/span>\r\n\t\t<\/div>\r\n\t\t<div class=\"timeline__item-body\" id=\"item4-ctrld\" role=\"region\" aria-labelledby=\"item4\" aria-hidden=\"true\">\r\n\t\t\t<div class=\"timeline__item-body-content\">\r\n\t\t\t\t<p class=\"timeline__item-p\">At 11:31:30 PM UTC, the digits of the time were 1234567890. This was celebrated worldwide, and even Google had a <a href=\"https:\/\/www.google.com\/logos\/unix1234567890.gif\" target=\"_blank\" rel=\"noopener\">doodle<\/a> for it.<\/p>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n\t<div class=\"timeline__item\">\r\n\t\t<div class=\"timeline__item-header\">\r\n\t\t\t<button class=\"timeline__arrow\" type=\"button\" id=\"item5\" aria-labelledby=\"item5-name\" aria-expanded=\"false\" aria-controls=\"item5-ctrld\" aria-haspopup=\"true\" data-item=\"5\">\r\n\t\t\t\t<svg class=\"timeline__arrow-icon\" viewBox=\"0 0 24 24\" width=\"24px\" height=\"24px\">\r\n\t\t\t\t\t<use href=\"#arrow\" \/>\r\n\t\t\t\t<\/svg>\r\n\t\t\t<\/button>\r\n\t\t\t<span class=\"timeline__dot\"><\/span>\r\n\t\t\t<span id=\"item5-name\" class=\"timeline__meta\">\r\n\t\t\t\t<time class=\"timeline__date\" datetime=\"2033-05-18\">May 18, 2033<\/time><br>\r\n\t\t\t\t<strong class=\"timeline__title\">2 Billion Seconds<\/strong>\r\n\t\t\t<\/span>\r\n\t\t<\/div>\r\n\t\t<div class=\"timeline__item-body\" id=\"item5-ctrld\" role=\"region\" aria-labelledby=\"item5\" aria-hidden=\"true\">\r\n\t\t\t<div class=\"timeline__item-body-content\">\r\n\t\t\t\t<p class=\"timeline__item-p\">Unix time will reach 2,000,000,000 seconds at 3:33:20 AM UTC.<\/p>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n\t<div class=\"timeline__item\">\r\n\t\t<div class=\"timeline__item-header\">\r\n\t\t\t<button class=\"timeline__arrow\" type=\"button\" id=\"item6\" aria-labelledby=\"item6-name\" aria-expanded=\"false\" aria-controls=\"item6-ctrld\" aria-haspopup=\"true\" data-item=\"6\">\r\n\t\t\t\t<svg class=\"timeline__arrow-icon\" viewBox=\"0 0 24 24\" width=\"24px\" height=\"24px\">\r\n\t\t\t\t\t<use href=\"#arrow\" \/>\r\n\t\t\t\t<\/svg>\r\n\t\t\t<\/button>\r\n\t\t\t<span class=\"timeline__dot\"><\/span>\r\n\t\t\t<span id=\"item6-name\" class=\"timeline__meta\">\r\n\t\t\t\t<time class=\"timeline__date\" datetime=\"2038-01-19\">January 19, 2038<\/time><br>\r\n\t\t\t\t<strong class=\"timeline__title\">Unix Epochalypse<\/strong>\r\n\t\t\t<\/span>\r\n\t\t<\/div>\r\n\t\t<div class=\"timeline__item-body\" id=\"item6-ctrld\" role=\"region\" aria-labelledby=\"item6\" aria-hidden=\"true\">\r\n\t\t\t<div class=\"timeline__item-body-content\">\r\n\t\t\t\t<p class=\"timeline__item-p\">Also known as the year 2038 problem, clocks running on a 32-bit signed integer will flip from 3:14:08 AM UTC on this day to 8:45:52 PM UTC on December 13, 1901. Therefore, values only from -2,147,483,648 to 2,147,483,647 for the second are supported.<\/p>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>\r\n<\/div><\/pre>\n
3. Next, let’s define the styles for our timeline in a separate CSS file (styles.css<\/code>).<\/p>\n
* {\r\n\tborder: 0;\r\n\tbox-sizing: border-box;\r\n\tmargin: 0;\r\n\tpadding: 0;\r\n}\r\n\r\n\r\n:root {\r\n\t--hue: 223;\r\n\t--bg: hsl(var(--hue),10%,90%);\r\n\t--fg: hsl(var(--hue),10%,10%);\r\n\t--primary: hsl(var(--hue),90%,50%);\r\n\t--trans-dur: 0.3s;\r\n\t--trans-timing: cubic-bezier(0.65,0,0.35,1);\r\n\tfont-size: calc(16px + (24 - 16) * (100vw - 320px) \/ (2560 - 320));\r\n}\r\na {\r\n\tcolor: var(--primary);\r\n\ttransition: color var(--trans-dur);\r\n}\r\nbody,\r\nbutton {\r\n\tcolor: var(--fg);\r\n\tfont: 1em\/1.5 \"IBM Plex Sans\", sans-serif;\r\n}\r\nbody {\r\n\tbackground-color: var(--bg);\r\n\theight: 100vh;\r\n\ttransition:\r\n\t\tbackground-color var(--trans-dur),\r\n\t\tcolor var(--trans-dur);\r\n}\r\nh1 {\r\n\tfont-size: 2em;\r\n\tmargin: 0 0 3rem;\r\n\tpadding-top: 1.5rem;\r\n\ttext-align: center;\r\n}\r\n.btn {\r\n\tbackground-color: var(--fg);\r\n\tborder-radius: 0.25em;\r\n\tcolor: var(--bg);\r\n\tcursor: pointer;\r\n\tpadding: 0.375em 0.75em;\r\n\ttransition:\r\n\t\tbackground-color calc(var(--trans-dur) \/ 2) linear,\r\n\t\tcolor var(--trans-dur);\r\n\t-webkit-tap-highlight-color: transparent;\r\n}\r\n.btn:hover {\r\n\tbackground-color: hsl(var(--hue),10%,50%);\r\n}\r\n.btn-group {\r\n\tdisplay: flex;\r\n\tgap: 0.375em;\r\n\tmargin-bottom: 1.5em;\r\n}\r\n.timeline {\r\n\tmargin: auto;\r\n\tpadding: 0 1.5em;\r\n\twidth: 100%;\r\n\tmax-width: 36em;\r\n}\r\n.timeline__arrow {\r\n\tbackground-color: transparent;\r\n\tborder-radius: 0.25em;\r\n\tcursor: pointer;\r\n\tflex-shrink: 0;\r\n\tmargin-inline-end: 0.25em;\r\n\toutline: transparent;\r\n\twidth: 2em;\r\n\theight: 2em;\r\n\ttransition:\r\n\t\tbackground-color calc(var(--trans-dur) \/ 2) linear,\r\n\t\tcolor var(--trans-dur);\r\n\t-webkit-appearance: none;\r\n\tappearance: none;\r\n\t-webkit-tap-highlight-color: transparent;\r\n}\r\n.timeline__arrow:focus-visible,\r\n.timeline__arrow:hover {\r\n\tbackground-color: hsl(var(--hue),10%,50%,0.4);\r\n}\r\n.timeline__arrow-icon {\r\n\tdisplay: block;\r\n\tpointer-events: none;\r\n\ttransform: rotate(-90deg);\r\n\ttransition: transform var(--trans-dur) var(--trans-timing);\r\n\twidth: 100%;\r\n\theight: auto;\r\n}\r\n.timeline__date {\r\n\tfont-size: 0.833em;\r\n\tline-height: 2.4;\r\n}\r\n.timeline__dot {\r\n\tbackground-color: currentColor;\r\n\tborder-radius: 50%;\r\n\tdisplay: inline-block;\r\n\tflex-shrink: 0;\r\n\tmargin: 0.625em 0;\r\n\tmargin-inline-end: 1em;\r\n\tposition: relative;\r\n\twidth: 0.75em;\r\n\theight: 0.75em;\r\n}\r\n.timeline__item {\r\n\tposition: relative;\r\n\tpadding-bottom: 2.25em;\r\n}\r\n.timeline__item:not(:last-child):before {\r\n\tbackground-color: currentColor;\r\n\tcontent: \"\";\r\n\tdisplay: block;\r\n\tposition: absolute;\r\n\ttop: 1em;\r\n\tleft: 2.625em;\r\n\twidth: 0.125em;\r\n\theight: 100%;\r\n\ttransform: translateX(-50%);\r\n}\r\n[dir=\"rtl\"] .timeline__arrow-icon {\r\n\ttransform: rotate(90deg);\r\n}\r\n[dir=\"rtl\"] .timeline__item:not(:last-child):before {\r\n\tright: 2.625em;\r\n\tleft: auto;\r\n\ttransform: translateX(50%);\r\n}\r\n.timeline__item-header {\r\n\tdisplay: flex;\r\n}\r\n.timeline__item-body {\r\n\tborder-radius: 0.375em;\r\n\toverflow: hidden;\r\n\tmargin-top: 0.5em;\r\n\tmargin-inline-start: 4em;\r\n\theight: 0;\r\n}\r\n.timeline__item-body-content {\r\n\tbackground-color: hsl(var(--hue),10%,50%,0.2);\r\n\topacity: 0;\r\n\tpadding: 0.5em 0.75em;\r\n\tvisibility: hidden;\r\n\ttransition:\r\n\t\topacity var(--trans-dur) var(--trans-timing),\r\n\t\tvisibility var(--trans-dur) steps(1,end);\r\n}\r\n.timeline__meta {\r\n\twidth: 100%;\r\n}\r\n.timeline__title {\r\n\tfont-size: 1.5em;\r\n\tline-height: 1.333;\r\n}\r\n\/* Expanded state *\/\r\n.timeline__item-body--expanded {\r\n\theight: auto;\r\n}\r\n.timeline__item-body--expanded .timeline__item-body-content {\r\n\topacity: 1;\r\n\tvisibility: visible;\r\n\ttransition-delay: var(--trans-dur), 0s;\r\n}\r\n.timeline__arrow[aria-expanded=\"true\"] .timeline__arrow-icon {\r\n\ttransform: rotate(0);\r\n}\r\n\r\n\/* Dark theme *\/\r\n@media (prefers-color-scheme: dark) {\r\n\t:root {\r\n\t\t--bg: hsl(var(--hue),10%,10%);\r\n\t\t--fg: hsl(var(--hue),10%,90%);\r\n\t\t--primary: hsl(var(--hue),90%,70%);\r\n\t}\r\n}<\/pre>\n
4. Now, let’s implement the JavaScript functionality to make our timeline collapsible. This script will handle user interactions and animate the expansion and collapse of timeline items.<\/p>\n
window.addEventListener(\"DOMContentLoaded\",() => {\r\n\tconst ctl = new CollapsibleTimeline(\"#timeline\");\r\n});\r\n\r\nclass CollapsibleTimeline {\r\n\tconstructor(el) {\r\n\t\tthis.el = document.querySelector(el);\r\n\r\n\t\tthis.init();\r\n\t}\r\n\tinit() {\r\n\t\tthis.el?.addEventListener(\"click\",this.itemAction.bind(this));\r\n\t}\r\n\tanimateItemAction(button,ctrld,contentHeight,shouldCollapse) {\r\n\t\tconst expandedClass = \"timeline__item-body--expanded\";\r\n\t\tconst animOptions = {\r\n\t\t\tduration: 300,\r\n\t\t\teasing: \"cubic-bezier(0.65,0,0.35,1)\"\r\n\t\t};\r\n\r\n\t\tif (shouldCollapse) {\r\n\t\t\tbutton.ariaExpanded = \"false\";\r\n\t\t\tctrld.ariaHidden = \"true\";\r\n\t\t\tctrld.classList.remove(expandedClass);\r\n\t\t\tanimOptions.duration *= 2;\r\n\t\t\tthis.animation = ctrld.animate([\r\n\t\t\t\t{ height: `${contentHeight}px` },\r\n\t\t\t\t{ height: `${contentHeight}px` },\r\n\t\t\t\t{ height: \"0px\" }\r\n\t\t\t],animOptions);\r\n\t\t} else {\r\n\t\t\tbutton.ariaExpanded = \"true\";\r\n\t\t\tctrld.ariaHidden = \"false\";\r\n\t\t\tctrld.classList.add(expandedClass);\r\n\t\t\tthis.animation = ctrld.animate([\r\n\t\t\t\t{ height: \"0px\" },\r\n\t\t\t\t{ height: `${contentHeight}px` }\r\n\t\t\t],animOptions);\r\n\t\t}\r\n\t}\r\n\titemAction(e) {\r\n\t\tconst { target } = e;\r\n\t\tconst action = target?.getAttribute(\"data-action\");\r\n\t\tconst item = target?.getAttribute(\"data-item\");\r\n\r\n\t\tif (action) {\r\n\t\t\tconst targetExpanded = action === \"expand\" ? \"false\" : \"true\";\r\n\t\t\tconst buttons = Array.from(this.el?.querySelectorAll(`[aria-expanded=\"${targetExpanded}\"]`));\r\n\t\t\tconst wasExpanded = action === \"collapse\";\r\n\r\n\t\t\tfor (let button of buttons) {\r\n\t\t\t\tconst buttonID = button.getAttribute(\"data-item\");\r\n\t\t\t\tconst ctrld = this.el?.querySelector(`#item${buttonID}-ctrld`);\r\n\t\t\t\tconst contentHeight = ctrld.firstElementChild?.offsetHeight;\r\n\r\n\t\t\t\tthis.animateItemAction(button,ctrld,contentHeight,wasExpanded);\r\n\t\t\t}\r\n\r\n\t\t} else if (item) {\r\n\t\t\tconst button = this.el?.querySelector(`[data-item=\"${item}\"]`);\r\n\t\t\tconst expanded = button?.getAttribute(\"aria-expanded\");\r\n\r\n\t\t\tif (!expanded) return;\r\n\r\n\t\t\tconst wasExpanded = expanded === \"true\";\r\n\t\t\tconst ctrld = this.el?.querySelector(`#item${item}-ctrld`);\r\n\t\t\tconst contentHeight = ctrld.firstElementChild?.offsetHeight;\r\n\r\n\t\t\tthis.animateItemAction(button,ctrld,contentHeight,wasExpanded);\r\n\t\t}\r\n\t}\r\n}<\/pre>\n
You can now add your timeline items within the <div id=\"timeline\" class=\"timeline\"><\/code> container in your HTML file. Each timeline item should have a header and a body, as demonstrated in the provided code.<\/p>\n
That’s all! hopefully, you have successfully created a Collapsible Timeline on your website. If you have any questions or suggestions, feel free to comment below.<\/p>\n","protected":false},"excerpt":{"rendered":"
This code snippet helps you to create a collapsible timeline using CSS3 and Vanilla JS. It allows you to expand…<\/p>\n","protected":false},"author":1,"featured_media":11396,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[116],"tags":[],"class_list":["post-11383","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vanilla-javascript"],"acf":[],"yoast_head":"\nCollapsible Timeline Using CSS3 and Vanilla JS — CodeHim<\/title>\n<meta name=\"description\" content=\"Here is a free code snippet to create a Collapsible Timeline Using CSS3 and Vanilla JS. You can view demo and download the source code.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/codehim.com\/vanilla-javascript\/collapsible-timeline-using-css3-and-vanilla-js\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Collapsible Timeline Using CSS3 and Vanilla JS — CodeHim\" \/>\n<meta property=\"og:description\" content=\"Here is a free code snippet to create a Collapsible Timeline Using CSS3 and Vanilla JS. 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