When viewing a list of users who retweeted a Tweet, these functions can extract that list from the global React state, making it easier to analyze the accounts for commonalities and other patterns.

getRetweeters.js

const SELECTORS = {
    RT_ROOT: "div[aria-label='Timeline: Retweeted by']",
    REACT_ROOT: "#react-root > div > div",
};

/**
 * Retrieve the properties of a React element.
 * @param {Object} element - The target React element.
 * @returns {Object} The properties of the given React element.
 * @throws Will throw an error if React props are not found.
 */
function getReactProps(element) {
    const key = Object.keys(element).find((key) =>
        key.startsWith("__reactProps")
    );
    if (key) {
        return element[key];
    }
    throw new Error("React props not found");
}

/**
 * Retrieves the properties of a React element from a specified selector.
 * @param {string} selector - The CSS selector of the target React element.
 * @returns {Object} The properties of the React element found at the selector.
 * @throws Will throw an error if the element is not found.
 */
function getReactPropsFromSelector(selector) {
    const element = document.querySelector(selector);
    if (!element) {
        throw new Error("Element not found");
    }
    return getReactProps(element);
}

/**
 * Retrieves user data for a given user ID.
 * @param {string} userID - The unique identifier of the user.
 * @returns {Object} The user data for the given user ID.
 */
function getUserData(userID) {
    const reactProps = getReactPropsFromSelector(SELECTORS.REACT_ROOT);
    const state = reactProps.children.props.store.getState();
    return state?.entities?.users?.entities?.[userID];
}

/**
 * Retrieves the data of users who retweeted a tweet.
 * @returns {Array} An array containing the data of all users who retweeted a tweet.
 */
function getRetweeters() {
    const retweeters = new Map();
    const reactProps = getReactPropsFromSelector(SELECTORS.RT_ROOT);
    for (const child of reactProps.children.filter(Boolean)) {
        const items = child?.props?.items;
        if (!items) {
            continue;
        }
        for (const item of items) {
            const { id } = item.content;
            if (!retweeters.has(id)) {
                const userData = getUserData(id);
                retweeters.set(id, userData);
            }
        }
    }
    return [...retweeters.values()];
}