Redux News Reader: Post comments not working

Everything works on this project except posting comments. I’ve been going through forums/solution code on github/chatGPT, etc and cannot figure out what the problem is. I know it is something in my commentsSlice.js file (code below) because if I copy and paste someone else’s code with builder instead of extraReducers it works perfectly. But the functionality should be the same so not sure why it’s not working the way I have it…

// Import createAsyncThunk and createSlice here. import { createAsyncThunk, createSlice } from '@reduxjs/toolkit'; // Create loadCommentsForArticleId here. export const loadCommentsForArticleId = createAsyncThunk('comments/loadCommentsForArticleId', async (articleID) => { const response = await fetch(`api/articles/${articleID}/comments`); const json = await response.json(); return json; }) // Create postCommentForArticleId here. export const postCommentForArticleId = createAsyncThunk( 'comments/postCommentForArticleId', async ({articleId, comment}) => { const requestBody = JSON.stringify({comment: comment}) const response = await fetch(`api/articles/${articleID}/comments`, { method: 'POST', body: requestBody }); const json = await response.json(); return json; }) export const commentsSlice = createSlice({ name: 'comments', initialState: { byArticleId: {}, isLoadingComments: false, failedToLoadComments: false, createCommentIsPending: false, failedToCreateComment: false }, extraReducers: { [loadCommentsForArticleId.pending]: (state, action) => { state.isLoadingComments = true; state.failedToLoadComments = false; }, [loadCommentsForArticleId.fulfilled]: (state, action) => { state.isLoadingComments = false; state.failedToLoadComments = false; const { articleId, comments} = action.payload; state.byArticleId[articleId] = comments; }, [loadCommentsForArticleId.rejected]: (state, action) => { state.isLoadingComments = false; state.failedToLoadComments = true; state.byArticleId = {}; }, [postCommentForArticleId.pending]: (state, action) => { state.createCommentIsPending = true; state.failedToCreateComment = false; }, [postCommentForArticleId.fulfilled]: (state, action) => { state.createCommentIsPending = false; state.failedToCreateComment = false; state.byArticleId[action.payload.articleId].push(action.payload) }, [postCommentForArticleId.rejected]: (state, action) => { state.createCommentIsPending = false; state.failedToCreateComment = true; } } }); export const selectComments = (state) => state.comments.byArticleId; export const isLoadingComments = (state) => state.comments.isLoadingComments; export const createCommentIsPending = (state) => state.comments.createCommentIsPending; export default commentsSlice.reducer;