IPA for Google Translate (phonetic transcription)

ipa-for-google-translate.js

// ==UserScript==
// @name         IPA for translate.google
// @namespace    https://gist.github.com/adielBm/21762fe5e964071cb820a0c46896da34
// @version      2024-06-27
// @description  Convert phonetic transcription to IPA on Google Translate
// @author       adielBm
// @match        https://translate.google.com/*
// @grant        none
// @updateURL    https://gist.githubusercontent.com/adielBm/21762fe5e964071cb820a0c46896da34/raw
// @downloadURL  https://gist.githubusercontent.com/adielBm/21762fe5e964071cb820a0c46896da34/raw
// ==/UserScript==

(function () {
  "use strict";
  function getIPA(str) {
    const mapping = {
      oi: "ɔɪ",
      ou: "aʊ",
      ô: "ɔ",
      ä: "ɑ",
      a: "æ",
      æʊ: "aʊ",
      i: "ɪ",
      ē: "i",
      o͝o: "ʊ",
      o͞o: "u",
      e: "ɛ",
      ā: "eɪ",
      ī: "aɪ",
      ō: "oʊ",
      NG: "ŋ",
      TH: "θ",
      T͟H: "ð",
      CH: "tʃ",
      SH: "ʃ",
      ZH: "ʒ",
      j: "dʒ",
      y: "j",
    };

    let result = "";
    let i = 0;
    const strLength = str.length;

    while (i < strLength) {
      let foundReplacement = false;

      // Check for multi-character replacements
      for (const key in mapping) {
        if (str.startsWith(key, i)) {
          result += mapping[key];
          i += key.length;
          foundReplacement = true;
          break;
        }
      }

      if (!foundReplacement) {
        result += str[i];
        i++;
      }
    }

    return result;
  }

  // Target element selectors
  const targetSelectors = ["[jsname=toZopb]", ".D4w5q"];

  // Function to be executed when a target element is created or its inner text changes
  function convertTextToIPA(element) {
    const text = element.innerHTML;
    if (text.length > 0 && text.charAt(0) !== "/") {
      element.innerText = `/${getIPA(text)}/`;
    }
  }

  // Create a new MutationObserver instance
  const observer = new MutationObserver((mutationsList) => {
    const processedElements = new Set();

    for (const mutation of mutationsList) {
      if (mutation.type === "childList" || mutation.type === "characterData") {
        // Check added/modified nodes
        mutation.addedNodes.forEach((node) => {
          if (node.nodeType === Node.ELEMENT_NODE) {
            targetSelectors.forEach((selector) => {
              if (node.matches(selector)) {
                convertTextToIPA(node);
                processedElements.add(node);
              } else {
                node.querySelectorAll(selector).forEach((child) => {
                  if (!processedElements.has(child)) {
                    convertTextToIPA(child);
                    processedElements.add(child);
                  }
                });
              }
            });
          }
        });

        // Check directly modified nodes
        if (
          mutation.type === "characterData" &&
          mutation.target.nodeType === Node.TEXT_NODE
        ) {
          const parent = mutation.target.parentElement;
          if (parent) {
            targetSelectors.forEach((selector) => {
              if (parent.matches(selector) && !processedElements.has(parent)) {
                convertTextToIPA(parent);
                processedElements.add(parent);
              }
            });
          }
        }
      }
    }
  });

  // Start observing the document for mutations
  observer.observe(document.body, {
    childList: true,
    characterData: true,
    subtree: true,
  });

  // Initial processing of existing elements
  targetSelectors.forEach((selector) => {
    document.querySelectorAll(selector).forEach(convertTextToIPA);
  });
})();

It helps me a lot, thanks!