This script parses posts in a Facebook group

parsePosts.js

function get_all_posts_content() {
    let my_txt = "";
    const posts = document.querySelectorAll("._5pbx.userContent");
    for (const post of posts) {
        my_txt += post.innerText + "\n-------------------\n"
    }
    return my_txt
}

function click_all_see_more() {
    const see_mores = document.querySelectorAll(".see_more_link")
    for (const see_more of see_mores) see_more.click()
}

function replace_with_full_links() {
    // some long links won't be displayed, so we need to replace each link with its href link
    const links = document.querySelectorAll("a[rel='noreferrer']")
    for (const link of links) {
        link.innerText = link.href;
    }
}


// first we need to scroll all the page to see all the posts
click_all_see_more()
replace_with_full_links()
get_all_posts_content()