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React Custom Hook: useScript

Level of difficultyMedium
Reading time2 min

In this article series, we embark on a journey through the realm of custom React hooks, discovering their immense potential for elevating your development projects. Our focus today is on the "useScript" hook, one of the many carefully crafted hooks available in the collection of React custom hooks.

Github: https://github.com/sergeyleschev/react-custom-hooks

import useAsync from "../useAsync/useAsync"

export default function useScript(url) {
    return useAsync(() => {
        const script = document.createElement("script")
        script.src = url
        script.async = true
        return new Promise((resolve, reject) => {
            script.addEventListener("load", resolve)
            script.addEventListener("error", reject)
    }, [url])

One of the significant advantages of useScript is its ability to handle script loading asynchronously. By setting the script's async attribute to true, you ensure that it won't block the rendering of your application. This improves the performance and overall user experience, especially when dealing with larger scripts or slow network connections.

useScript can be used in various scenarios. For instance, you can load external libraries like jQuery, enabling you to harness its powerful functionalities without adding bulk to your bundle. Additionally, you can load analytics scripts, social media widgets, or any other script necessary for your application's dynamic behavior.

import useScript from "./useScript"

export default function ScriptComponent() {
    const { loading, error } = useScript(
    if (loading) return <div>Loading</div>
    if (error) return <div>Error</div>
    return <div>{window.$(window).width()}</div>

In the example above, we see how useScript is utilized in a ScriptComponent. The useScript hook is called with the URL of the jQuery library as an argument. The hook returns the loading and error states, which can be used to display a loading spinner or an error message accordingly. Once the script is successfully loaded, the component displays the current window width using jQuery.

Full Version | React Custom Hooks: https://habr.com/en/articles/746760/

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