https://yuseflateef.com/news/files/meta.js

1(function() {
2	var Realmac = Realmac || {};
3
4	Realmac.meta = {
5		
6		// Set the browser title
7		//
8		// @var String text
9		setTitle: function(text) {
10			return document.title = text;
11		},
12		
13		// Set the content attribute of a meta tag
14		//
15		// @var String name
16		// @var String content
17		setTagContent: function(tag, content){
18			// If the tag being set is title
19			// return the result of setTitle
20			if ( tag === 'title' )
21			{
22				return this.setTitle(content);
23			}
24			
25			// Otherwise try and find the meta tag
26			var tag = this.getTag(tag);
27			
28			// If we have a tag, set the content
29			if ( tag !== false )
30			{
31				return tag.setAttribute('content', content);
32			}
33			
34			return false;
35		},
36		
37		// Find a meta tag
38		//
39		// @var String name
40		getTag: function(name) {
41			var meta = document.querySelectorAll('meta');
42			
43			for ( var i=0; i<meta.length; i++ )
44			{
45				if (meta[i].name == name){
46					return meta[i];
47				}
48			}
49			
50			var tag = document.createElement('meta');
51			tag.name = name;
52			document.getElementsByTagName('head')[0].appendChild(tag);
53			
54			return tag;
55		}
56	};
57 
58	// Object containing all website meta info
59	var websiteMeta = {"archive-june-2019.html":"Archives for June 2019","archive-december-2021.html":"Archives for December 2021","archive-april-2016.html":"Archives for April 2016","archive-march-2018.html":"Archives for March 2018","archive-november-2024.html":"Archives for November 2024","archive-february-2020.html":"Archives for February 2020","archive-june-2021.html":"Archives for June 2021","archive-december-2020.html":"Archives for December 2020","archive-march-2022.html":"Archives for March 2022","archive-february-2019.html":"Archives for February 2019"};
60 
61	// pageId must match the key in websiteMeta object
62	var url = window.location.pathname;
63	var pageId = url.substring(url.lastIndexOf('/')+1);
64	if (!pageId || pageId.length == 0){
65		pageId = 'index.html';
66	}
67	pageMeta = websiteMeta[pageId];
68 
69	// If we have meta for this page
70	if (pageMeta){
71		Realmac.meta.setTagContent('description', pageMeta);
72	}
73 
74 })();