useIsFirstRender

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React hook that returns true if the component is the first render

Example

Demo Code

import { useState } from "react";
import useIsFirstRender from "@/hooks/useIsFirstRender";

export default function UseIsFirstRenderExample() {
  const isFirstRender = useIsFirstRender();
  const [count, setCount] = useState(0);

  return (
    <div className="text-ctp-text">
      <p>Is first render: {isFirstRender ? "yes" : "no"}</p>
      <p>Count: {count}</p>
      <button
        className="rounded bg-ctp-blue px-4 py-2 text-ctp-base"
        onClick={() => setCount(count + 1)}
      >
        Increment
      </button>
    </div>
  );
}

Code

import { useRef } from "react";

/**
 * React hook that returns true if the component is the first render
 * @returns {boolean} true if the component is the first render
 */
export default function useIsFirstRender(): boolean {
  const renderRef = useRef(true);

  if (renderRef.current === true) {
    renderRef.current = false;
    return true;
  }

  return renderRef.current;
}