Ever feel like your website takes ages to load? It could be caused by render-blocking JavaScript. Don’t worry, this post will explain what it is and how to fix it in a way that’s easy to understand, even for beginners!
Understanding Render-Blocking JavaScript
Render-blocking JavaScript refers to scripts that delay the rendering of a webpage until they are fully loaded and executed. This delay can result in slower loading times, frustrating user experiences, and potentially lower search engine rankings.
Why Should You Care?
A slow website frustrates visitors and hurts your search engine ranking. People are impatient, and if your site takes too long to load, they’ll click away to a competitor. Search engines also prioritize fast-loading websites, so a slow site can mean fewer visitors overall.
<script>/*<![CDATA[*/
// lazyload by atcodez
function lazyOnload() {
// wrap your javascript in here}
function dtcLzy(){lazyOnload(),localStorage.setItem(“wcLoadJs”,”true”)}var wcLdStorage=localStorage.getItem(“wcLoadJs”);if(“true”!=wcLdStorage){var t=!1,e=!1;window.addEventListener(“scroll”,()=>{(0!=document.documentElement.scrollTop&&!1===t||0!=document.body.scrollTop&&!1===t)&&(dtcLzy(),t=!0,e=!0)},!0),window.addEventListener(“click”,()=>{!1===e&&!1===e&&(dtcLzy(),e=!0,t=!0)},!0)}”true”===wcLdStorage&&lazyOnload();
/*]]>*/</script>
or
<script>/*<![CDATA[*/
// lazyload by atcodez
function lazyOnload() {
let globalJs = ‘https://example.js’; let script = document.createElement(“script”); script.src = globalJs, script.async = !0, document.body.appendChild(script)
}
function dtcLzy(){lazyOnload(),localStorage.setItem(“wcLoadJs”,”true”)}var wcLdStorage=localStorage.getItem(“wcLoadJs”);if(“true”!=wcLdStorage){var t=!1,e=!1;window.addEventListener(“scroll”,()=>{(0!=document.documentElement.scrollTop&&!1===t||0!=document.body.scrollTop&&!1===t)&&(dtcLzy(),t=!0,e=!0)},!0),window.addEventListener(“click”,()=>{!1===e&&!1===e&&(dtcLzy(),e=!0,t=!0)},!0)}”true”===wcLdStorage&&lazyOnload();
/*]]>*/</script>
How the Provided Code Snippet Helps
JavaScript files asynchronously or when needed, rather than blocking the rendering of the entire webpage.
- Triggering Lazy Loading: The dtcLzy() function triggers the lazy loading process. It checks if the script has already been loaded and, if not, sets a flag in the local storage to indicate that it should be loaded. This ensures that the lazy loading process is only initiated once.
- Event Listeners: The code snippet includes event listeners for both scrolling and clicking events. These listeners detect user interactions and trigger the lazy loading function accordingly. By waiting for user interactions, the script prioritizes loading JavaScript files only when necessary, minimizing their impact on initial page rendering.
Implementing the Code Snippet
To implement the provided code snippet on your website:
- Copy the code snippet and paste it into your website’s HTML file, preferably just before the closing </body> tag.
- Customize the globalJs variable with the URL of the JavaScript file you want to lazy load.
- Test your website to ensure that the lazy loading functionality is working as expected and that there are no conflicts with other scripts or plugins.
By eliminating render-blocking JavaScript, you can make your website load faster, improve user experience, and potentially boost your search engine ranking. Take action today and see the difference a speedy website can make!