https://melmagazine.com/wp-content/themes/mel/redesign/assets/js/amazon-subtags.js?ver=86

1const dateTime = new Date();
2const dateHour = dateTime.getDate().toString().padStart(2, 0) +
3    dateTime.getHours().toString().padStart(2, 0);
4
5const fixLinks = (e = null) => {
6    if (e) e.preventDefault();
7
8    const affiliateLinks = Array
9        .from(document.querySelectorAll('article a[href*=amazon], article a[href*=amzn]'))
10        .map(el => {
11            const url = new URL(el.getAttribute('href'));
12            const searchParams = new URLSearchParams(url.search);
13            let subtag = searchParams.get('ascsubtag');
14
15            if (!subtag) {
16                return false;
17            }
18
19            subtag = encodeURI(subtag);
20
21            return { el, subtag, decodedSubtag: decodeURI(subtag) };
22        })
23        .filter(link => !!link);
24
25    if (affiliateLinks.length < 1) return;
26
27    let { innerWidth: width, innerHeight: height } = window;
28
29    width = width
30        .toString()
31        .substring(0, 4)
32        .padStart(4, 0);
33
34    height = height
35        .toString()
36        .substring(0, 4)
37        .padStart(4, 0);
38
39    affiliateLinks.map(link => {
40        const newSubtag = encodeURI(
41            link.decodedSubtag.substring(0, 17) +
42            width +
43            height +
44            link.decodedSubtag.substring(25, 35) +
45            dateHour +
46            link.decodedSubtag.substring(39, 100)
47        );
48
49        link.el.setAttribute(
50            'href',
51            link.el.getAttribute('href').replace(link.subtag, newSubtag)
52        );
53
54        console.info('Subtag replaced from\n', link.subtag, '\nto', newSubtag);
55    })
56};
57
58window.addEventListener('resize', e => fixLinks(e));
59
60fixLinks();