delete_facebook_posts.js

function deleteFbComments() {
  let postDeleted = 0;
  const CLICK_DELAY = 50;

  function randomIntFromInterval(min, max) {
    return Math.floor(Math.random() * (max - min + 1) + min);
  }

  function sleep(ms = 200) {
    return new Promise((resolve) => setTimeout(resolve, ms));
  }

  function selectThreeDotElements() {
    return document.getElementsByClassName("cypi58rs");
  }

  function selectDeleteButton() {
    return document.getElementsByClassName("tiyi1ipj")[0];
  }

  async function selectAndDeleteFacebookComment(comment) {
    console.log("Selected comment...");
    if (!comment || !comment.children || !comment.children[0])
      throw new Error("No comment selected!");
    await singleClick(comment.children[0]);
    console.log("Clicked three dots...");
    await sleep();
    let deleteButton = await selectDeleteButton();
    if (!deleteButton) throw new Error("No deleteButton selected!");
    await singleClick(deleteButton);
    console.log("Deleted post!");
  }

  async function singleClick(elem) {
    return new Promise((resolve) => {
      setTimeout(() => {
        elem.click();
        resolve();
      }, CLICK_DELAY);
    });
  }

  async function run() {
    let comments;
    do {
      comments = selectThreeDotElements();
      try {
        selectAndDeleteFacebookComment(
          comments[randomIntFromInterval(0, comments.length-1)]
        );
        postDeleted++;
        console.log(`Deleted ${postDeleted} posts`);
      } catch (err) {
        console.error("Failed while selecting and deleteing post", err);
        await sleep(8000);
      }
      await sleep();
    } while (comments && comments.length > 0);
  }

  run();
}
deleteFbComments()