deer-flow/frontend/src/core/clipboard.ts

export async function writeTextToClipboard(text: string): Promise<boolean> {
  try {
    const clipboard = globalThis.navigator?.clipboard;
    if (clipboard?.writeText) {
      await clipboard.writeText(text);
      return true;
    }

    const document = globalThis.document;
    if (!document?.body?.appendChild || !document.execCommand) {
      return false;
    }

    const textarea = document.createElement("textarea");
    textarea.value = text;
    textarea.setAttribute("readonly", "");
    textarea.style.position = "fixed";
    textarea.style.top = "-9999px";
    textarea.style.left = "-9999px";
    document.body.appendChild(textarea);
    textarea.select();

    try {
      return document.execCommand("copy");
    } finally {
      textarea.remove();
    }
  } catch {
    return false;
  }
}