获取古腾堡中块的唯一id的一种方法是使用clientId，但方式不同。如果clientId字符串只使用一次，则可以将其存储在块的属性中，该属性将存储在数据库中，并且可以在任何给定的时间检索它，诀窍是在块首次装载时存储块提供给您的clientId，然后在页面重新加载时停止WordPress编辑该属性。这样，每次重新加载页面时，您都会有一个不同的clientId，但使用第一个clientId保存的属性仍将在属性中可用。代码应如下所示：

import { useEffect } from \'@wordpress/element\';
import { useBlockProps } from \'@wordpress/block-editor\';

// ... Whatever else you want to import

export default function Edit({ clientId, attributes, setAttributes }) {
    const blockProps = useBlockProps(); 

    /*useEffect is a React hook that triggers during the component\'s life 
      cycle parts, but when giving it an empty array as a second argument
      it will only trigger on mounting the component*/

    useEffect(() => {

        //This conditional is useful to only set the id attribute once
        //when the component mounts for the first time

        attributes.id === \'\' 
        && setAttributes( { "id": clientId } )
    }, [])
    
    //... the rest of your logic goes here


    return (
        <div { ...blockProps }>
            {// You can use attributes.id as a class or id or whatever serves your purpose }
            <div className={attributes.id}>
               //...more JSX or HTML
            </div>                  
        </div>
    );
}

    "attributes": {
        "id": {
            "type": "string",
            "default": ""
        }

        //...The rest of your attributes
    }

我也读过this question 也就是说你可以使用withInstanceId 获取唯一标识符，但我尚未测试该方法。