Cross browser testing - automation framework-cypress,playwrite; CloudBorwser -saucelabs browserstack

 Evaluating cross-browser testing for a React application involves assessing both functional consistency (JavaScript/API behavior) and visual integrity (CSS/layout) across different browser engines

• UI Rendering & Layout: Check for misaligned elements, font rendering differences, and broken responsive breakpoints.
• JavaScript Functionality: Verify that event handlers, form submissions, and asynchronous data fetching (e.g., fetch or axios calls) behave identically.
• State Hydration: Ensure that the React state hydrates correctly in all browsers to prevent "blank screen" bugs common in Safari or older browsers.
• Performance: Compare page load times and smoothness of animations/transitions across engines. 

Recommended Testing Stack

A robust evaluation strategy combines automated scripts with real-device cloud access. 

Tool Type	Recommended Tools	Why for React?
Automation Frameworks	Playwright, Cypress, Selenium	Supports multiple browser engines; Playwright is often preferred for its native WebKit support.
Cloud Browser Grids	BrowserStack, LambdaTest, Sauce Labs	Provides access to 3,000+ real browser/OS/device combinations without manual setup.
Visual Testing	Applitools, Percy	Uses AI to detect visual regressions and layout shifts that code-based tests might miss.

React Windowing or List virtualization - React App optimization

 Windowing or List virtualization is a concept of only rendering or write the visible portion in the current “ window ” to the DOM. The number of items that rendered at first time are smaller than the original one.

The remaining items are rendered when you scroll down to it. The DOM nodes of items that exit the window are replaced by the new ones. This improves the performance of rendering a large list.

import React, { useState } from "react";

import ReactDOM from "react-dom";

import range from "lodash/range";

import "./styles.css";

function App() {

  const [render, setRender] = useState(false);

  const [itemCount, setItemCount] = useState(10000);

  return (

    <div>

      <h1>

        Render simple <code>{"<div />s"}</code>

      </h1>

      <div>

        Item count:{" "}

        <input

          type="number"

          value={itemCount}

          onChange={({ target: { value } }) => {

            setItemCount(value);

            setRender(false);

          }}

        />

      </div>

      <p>Notice the time it takes for the first loading</p>

      <button onClick={() => setRender(true)}>Render</button>

      <button onClick={() => setRender(false)}>Clear</button>

      <div>

        {render && range(itemCount).map(i => <div key={i}>Item {i}</div>)}

      </div>

    </div>

  );

}

const rootElement = document.getElementById("root");

ReactDOM.render(<App />, rootElement);

mysql to mariadb: unknown collation utf8mb4_0900_ai_ci

 57

I have a mysql 8.0 that I exported using mysqldump. I am trying to import it onto a Mariadb 10.4 database with phpmyadmin, both are the most current versions. Each time I do it though, I get:

Error: Unknown collation utf8mb4_0900_ai_ci

Then I went back into the sql file and replaced utf8mb4_0900_ai_ci with utf8mb4_general_ci, but then it says there are errors with various CREATE VIEW sql statements. Are there any other quick, error free fixes I can try?