Installations
npm install lazy-loadableDeveloper Guide
Typescript
No
Module System
ESM
Node Version
10.13.0
NPM Version
6.4.1
Score
66.1
Supply Chain
92.7
Quality
75.1
Maintenance
100
Vulnerability
100
License
Releases
Unable to fetch releases
Contributors
Unable to fetch Contributors
Languages
JavaScript (100%)
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Developer
manobi
Download Statistics
Total Downloads
1,411
Last Day
1
Last Week
4
Last Month
29
Last Year
168
GitHub Statistics
MIT License
17 Stars
44 Commits
3 Watchers
1 Branches
5 Contributors
Updated on Nov 25, 2019
Bundle Size
860.00 B
Minified
517.00 B
Minified + Gzipped
Maintainers
Package Meta Information
Latest Version
0.1.3
Package Id
lazy-loadable@0.1.3
Unpacked Size
6.66 kB
Size
3.40 kB
File Count
4
NPM Version
6.4.1
Node Version
10.13.0
Total Downloads
Cumulative downloads
Total Downloads
1,411
Last Day
-66.7%
1
Compared to previous day
Last Week
-76.5%
4
Compared to previous week
Last Month
45%
29
Compared to previous month
Last Year
-38.2%
168
Compared to previous year
Daily Downloads
Weekly Downloads
Monthly Downloads
Yearly Downloads
No dependencies detected.
Native lazy load boilerplate
- 🧱 Pollyfill for modern browsers
- 👵 Gracefully degrades for old browsers
- 🤖 Future proof markup
- 🚉 Using the platform
The whole idea is to create a copy-past boilerplate that works today. If by a miracle all browser vendors agree to ship "native lazy load", you would only have to change one place.
Boilerplate
1<img 2 is="lazy-loadable" 3 loading="lazy" 4 lazyload="1" 5 importance="low" 6 srcset="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAEElEQVR42gEFAPr/AP///wAI/AL+Sr4t6gAAAABJRU5ErkJggg==" 7 src="https://placekitten.com/400/400" 8 width="400" 9 height="400" 10 alt="" 11> 12<script type="module"> 13 import LazyLoadable from 'https://cdn.pika.dev/lazy-loadable'; 14 customElements.define('lazy-loadable', LazyLoadable, { extends: "img" }); 15</script>
Attributes breakdown
is="lazy-loadable"
Apply the lazy-loadable custom element pollyfill behaviour to your image tag. Usually people loop over all images on a page (querySelectorAll('img.lazy').forEach), to decide if it should lazy load, it can be very slow, you also have to wait until the DOM is ready or put your script at end of body, it would not work if a image appears in document after the document have loaded, like in infinity scrolling or lazy rendering. Using custom elements the browser handles all of it for you.
loading="lazy"
The native way to tell the browser to delay the image loading, until it's in the screen. Only Google Chrome have shipped it yet.
lazyload="1"
It seems Microsoft implemented on IE 11 and Edge 12 a unofficial attribute called "lazyload". But it does not work the same way as "loading=lazy", it only tell the browser to decrese the loading priority of the resource. Actually it's pretty similar to what "importance=low" does.
importance="low"
This is a spec proposal to enable developers to signal the priority of each resource they need to download. In case a browser vendor never implement the "native lazy load", but for any reason ships the priority hints support, we would at least download the image without high priority.
srcset Since there is no ways yet to know if the browser have native support before images starts loading we need to set a placeholder image.
Our placeholder is the one responsible for the magic. I've chosen to use srcset as placeholder instead of a infamous "data-src". By placing the placeholder on "srcattr", we can hold the "src" loading, until we are sure if the browser handles lazy by default. In future if all browsers support native lazy-load, all you would have to do is remove this attribute from your html.
The great advantage of using "srcattr" instead of "data-src" is that when you remove the placeholder, browsers already knows what to do, respecting the standard fallback src, picture source, media attributes and pixel density.
width & height Explicitally declare the image size to avoid page jumps.
Safari custom elements pollyfill
Apple have chosen to not ship a complete implementation of custom elements V1, in order for it to work in Safari you may have to use the ungap pollyfill before your scripts:
1<script> 2 if(this.customElements) 3 try{customElements.define('built-in',document.createElement('p').constructor,{'extends':'p'})} 4 catch(s){document.write('<script src="//unpkg.com/@ungap/custom-elements-builtin"><\x2fscript>')} 5 else 6 document.write('<script src="//unpkg.com/document-register-element"><\x2fscript>'); 7</script>
Install
If you prefer to bundle the pollyfill yourself or use it with a framework:
1npm install lazy-loadable -s
1import LazyLoadable from 'lazy-loadable'; 2customElements.define('lazy-loadable', LazyLoadable, { extends: "img" });
License
Distributed under the MIT license. See LICENSE for details.
No vulnerabilities found.
Reason
no binaries found in the repo
Reason
license file detected
Details
- Info: project has a license file: LICENSE:0
- Info: FSF or OSI recognized license: MIT License: LICENSE:0
Reason
Found 0/30 approved changesets -- score normalized to 0
Reason
0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
Reason
no SAST tool detected
Details
- Warn: no pull requests merged into dev branch
Reason
no effort to earn an OpenSSF best practices badge detected
Reason
security policy file not detected
Details
- Warn: no security policy file detected
- Warn: no security file to analyze
- Warn: no security file to analyze
- Warn: no security file to analyze
Reason
project is not fuzzed
Details
- Warn: no fuzzer integrations found
Reason
branch protection not enabled on development/release branches
Details
- Warn: branch protection not enabled for branch 'master'
Reason
64 existing vulnerabilities detected
Details
- Warn: Project is vulnerable to: GHSA-67hx-6x53-jw92
- Warn: Project is vulnerable to: GHSA-6chw-6frg-f759
- Warn: Project is vulnerable to: GHSA-v88g-cgmw-v5xw
- Warn: Project is vulnerable to: GHSA-93q8-gq69-wqmw
- Warn: Project is vulnerable to: GHSA-fwr7-v2mv-hh25
- Warn: Project is vulnerable to: GHSA-qwcr-r2fm-qrc7
- Warn: Project is vulnerable to: GHSA-grv7-fg5c-xmjg
- Warn: Project is vulnerable to: GHSA-w8qv-6jwh-64r5
- Warn: Project is vulnerable to: GHSA-pxg6-pf52-xh8x
- Warn: Project is vulnerable to: GHSA-7gc6-qh9x-w6h8
- Warn: Project is vulnerable to: GHSA-3xgq-45jj-v275
- Warn: Project is vulnerable to: GHSA-gxpj-cx7g-858c
- Warn: Project is vulnerable to: GHSA-w573-4hg7-7wgq
- Warn: Project is vulnerable to: GHSA-j4f2-536g-r55m
- Warn: Project is vulnerable to: GHSA-r7qp-cfhv-p84w
- Warn: Project is vulnerable to: GHSA-3gx7-xhv7-5mx3
- Warn: Project is vulnerable to: GHSA-2j2x-2gpw-g8fm
- Warn: Project is vulnerable to: GHSA-74fj-2j2h-c42q
- Warn: Project is vulnerable to: GHSA-pw2r-vq6v-hr8c
- Warn: Project is vulnerable to: GHSA-jchw-25xp-jwwc
- Warn: Project is vulnerable to: GHSA-cxjh-pqwp-8mfp
- Warn: Project is vulnerable to: GHSA-8r6j-v8pm-fqw3
- Warn: Project is vulnerable to: MAL-2023-462
- Warn: Project is vulnerable to: GHSA-4q6p-r6v2-jvc5
- Warn: Project is vulnerable to: GHSA-43f8-2h32-f4cj
- Warn: Project is vulnerable to: GHSA-6x33-pw7p-hmpq
- Warn: Project is vulnerable to: GHSA-qqgx-2p2h-9c37
- Warn: Project is vulnerable to: GHSA-9c47-m6qq-7p4h
- Warn: Project is vulnerable to: GHSA-7x7c-qm48-pq9c
- Warn: Project is vulnerable to: GHSA-rc3x-jf5g-xvc5
- Warn: Project is vulnerable to: GHSA-6c8f-qphg-qjgp
- Warn: Project is vulnerable to: GHSA-jf85-cpcp-j695
- Warn: Project is vulnerable to: GHSA-p6mc-m468-83gw
- Warn: Project is vulnerable to: GHSA-29mw-wpgm-hmr9
- Warn: Project is vulnerable to: GHSA-35jh-r3h4-6jhm
- Warn: Project is vulnerable to: GHSA-82v2-mx6x-wq7q
- Warn: Project is vulnerable to: GHSA-952p-6rrq-rcjv
- Warn: Project is vulnerable to: GHSA-f8q6-p94x-37v3
- Warn: Project is vulnerable to: GHSA-vh95-rmgr-6w4m
- Warn: Project is vulnerable to: GHSA-xvch-5gv4-984h
- Warn: Project is vulnerable to: GHSA-w7rc-rwvf-8q5r
- Warn: Project is vulnerable to: GHSA-r683-j2x4-v87g
- Warn: Project is vulnerable to: GHSA-6fx8-h7jm-663j
- Warn: Project is vulnerable to: GHSA-hj48-42vr-x3v9
- Warn: Project is vulnerable to: GHSA-g6ww-v8xp-vmwg
- Warn: Project is vulnerable to: GHSA-hrpp-h998-j3pp
- Warn: Project is vulnerable to: GHSA-c2qf-rxjj-qqgw
- Warn: Project is vulnerable to: GHSA-fxwf-4rqh-v8g3
- Warn: Project is vulnerable to: GHSA-25hc-qcg6-38wj
- Warn: Project is vulnerable to: GHSA-xfhh-g9f5-x4m4
- Warn: Project is vulnerable to: GHSA-qm95-pgcg-qqfq
- Warn: Project is vulnerable to: GHSA-cqmj-92xf-r6r9
- Warn: Project is vulnerable to: GHSA-3jfq-g458-7qm9
- Warn: Project is vulnerable to: GHSA-r628-mhmh-qjhw
- Warn: Project is vulnerable to: GHSA-9r2w-394v-53qc
- Warn: Project is vulnerable to: GHSA-5955-9wpr-37jh
- Warn: Project is vulnerable to: GHSA-qq89-hq3f-393p
- Warn: Project is vulnerable to: GHSA-f5x3-32g6-xq36
- Warn: Project is vulnerable to: GHSA-mgfv-m47x-4wqp
- Warn: Project is vulnerable to: GHSA-3h5v-q93c-6h6q
- Warn: Project is vulnerable to: GHSA-72mh-269x-7mh5
- Warn: Project is vulnerable to: GHSA-h4j5-c7cj-74xg
- Warn: Project is vulnerable to: GHSA-c4w7-xm78-47vh
- Warn: Project is vulnerable to: GHSA-p9pc-299p-vxgp
Score
1.7
/10
Last Scanned on 2025-02-10
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