Category: javascript

I can’t quite figure out how to save the selection for dark/light mode as a cookie.

Here is the webpage I am trying it on:
https://schooloffish.info/index.html

Tried w3schools code for cookies but I can’t get it to work. Any help is appreciated.

I have problem that when my code auto refreshes after I saved the file on VS Code, theText and theBtn returns the targeted elements and the page displays the content and everything works fine. But whenever I refresh the page manually, the page displays the content, but when I clicked theBtn element to expand the text, the theText and theBtn becomes empty and the page failed with an error saying “cannot read property of undefined”.

I have been trying to find why, but I could not. Someone please help.
Thank you.

import { React, useEffect, useState } from 'react';
    import places from '../data/places';


const Tours = () => {
return (
    <>
        <div className="my-20 mx-auto bg-blue-100 " style={{ height: "100%" }}>
            <h1 className="text-5xl capitalize text-center font-semibold">our tours</h1>
            <hr className="w-20 place-self-center mx-auto border-2 mb-12 mt-2 border-green-600" />
            <Tuor cTime={new Date().getTime().toString()} />
        </div>
    </>
)
}

const Tuor = (props) => {

const [tuors, setTours] = useState(places);

 const theText = document.querySelectorAll(".theText")
 const theBtn = document.querySelectorAll(".theBtn")
        console.log(theText);
        console.log(theBtn);


const expandText = (index) => {

    if (theBtn[index].innerHTML === "read more") {
        theText[index].style.maxHeight = "50rem";
        theBtn[index].innerHTML = "show less";
    } else if (theBtn[index].innerHTML === "show less") {
        theText[index].style.maxHeight = "6rem";
        theBtn[index].innerHTML = "read more";

    }
}

const removePlace = (id) => {
    const newTours = tuors.filter((place) => {
        return place.id !== id;
    });
    setTours(newTours);
}
return (
    <>
        {
            tuors.map((place, index) => {
                let price = new Intl.NumberFormat().format(place.price);
               
                return (
                    <>
                        <div key={index} className="flex flex-col w-2/4 mx-auto bg-white shadow-2xl mb-10">

                            <div>
                                <img src={place.image} alt={place.title} />
                            </div>

                            <div className="flex mt-10">
                                <div className="flex justify-start w-3/4 pl-10">
                                    <p className="tracking-widest capitalize font-bold">{place.title}</p>
                                </div>
                                <div className="flex justify-end w-1/4 pr-10"><p className="bg-blue-50 tracking-wider p-1 rounded-lg font-bold text-blue-400">N{price}</p></div>
                            </div>
                            <div className="my-5 px-10 py-2">
                                <p className="text-gray-500 theText">{place.description}</p><button className="text-blue-500 capitalize theBtn" onClick={() => expandText(index)}>read more</button>
                            </div>
                            <button className="ring-1 ring-red-600 text-red p-1 rounded-sm w-48 mx-auto capitalize my-12" onClick={() => removePlace(place.id)}>not interested</button>
                        </div>

                    </>
                )
            })
        }
    </>
)
}


export default Tours;

I’m trying to extend a built-in javascript function via prototype, but when I attempt to refer to this, Window is returned. Given that I don’t really have access to rewrite the implementation, are there any ways to get around this?

Specifically I’m trying to extend URLSearchParams in such a way that it unsets values properly. Something like:

URLSearchParams.prototype.setOrUnset = (key, val) => {
    if(val){
        this.set(key, val)
    } else {
        this.delete(key)
    }
}

hello i have creating a pragam that delete one array from another but. And it works fine i think but if i put 2 same value simultaneously, it remove only one value because of second argument of splice function. How can i check after deleting a element again if there any other number left my code is below.

const arr1 = [1, 2, 2, 3, 5, 2, 3, 7];
const arr2 = [2, 3];

let countArr = [];
for (let i = 0; i < arr2.length; i++) {
  for (let j = 0; j <= arr1.length; j++) {
    if (arr1[j] === arr2[i]) {
      arr1.splice(j, 1);
    }
  }
}
console.log(arr1);

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>

  <script src="demo.js"></script>
</body>

</html>

I have my fully working app here that I’m trying to host on a localhost server using Express.js

https://jsfiddle.net/mostafa91/6axesy2t/2/

Here is my server.js that I run with “node server.js”:

const express = require('express');
const app = express();
const port = 2525;

app.get('/', (req, res) => {
    res.sendFile(__dirname + '/public/Gameboard.html');
});

app.listen(port, () => {
    console.log(`Tic-Tac-Toe listening at http://localhost:${port}`);
});

app.use(express.static('public'));

I keep getting errors when I try to play the game (vs. Players option):

Uncaught TypeError: Cannot read properties of null (reading 'classList')
    at setBoardHoverClass (Gameboard.js:74)
    at startGame (Gameboard.js:32)
    at Gameboard.js:20

I’ve included my file structure as well:

Het all I can not seem to get this below code to work:

var links = doc.DocumentNode.SelectSingleNode("/html/body/div[1]/div/div[4]/div/div/div[2]/div[2]/span[1]");

foreach (HtmlNode item in table.SelectNodes("//span[1]/descendant::a[starts-with(@href,'/photo')]"))
{
    console.log("test");
}

It keeps telling me:

Uncaught SyntaxError: missing ) after argument list

It looks like all my “)” are present and in the correct spots?

the HTML that I am getting the links from looks like this:

<span>
  <a href="/photo356.png" class="_4dvp" id="_D9">
    <div class="_403j">
      <i class="im_2sxw" style="width:100px;height:100px;" aria-label="pic" role="img"></i>
      <div class="_5fef">
        <div class="_5feg" role="link" aria-label="25">
          <i class="imgMGdk7"></i>25
        </div>
        <div class="fezg" role="link" aria-label="15">
          <i class="_imgsp_l0"></i>15
        </div>
      </div>
    </div>
  </a>
  <a href="/photo17814561.png" class="_39pvp" id="u3_sz">
    <div class="_403j">
      <i class="imgxw" style="width:100px;height:100px;" aria-label="pic61" role="img"></i>
      <div class="_5f">
        <div class="fzeg" role="link" aria-label="23">
          <i class="_img2e1b6"></i>23
        </div>
    ...etc....

the XPath starts at the . The XPath is this:

/html/body/div[1]/div/div[4]/div/div/div[2]/div[2]/span[1]

But like I said above I just get that JS error. I’m not even sure my XPATH logic is even correct since I’m not able to pass this error and continue on…

Help would be great!

I want to make a js library, and I have all the code. Libraries like Jquery can let you do like

<script src = "..."></script>
<script>
//uses the library
</script>

without the import * from JQuery.
How can I do this without declaring the library a modular or importing?

I use a WYSIWYG editor in my website. It has the option of changing the font-size and fontcolor of the chapter.

However, I want to make sure that if the user desires, they can actually override the font settings while reading it.

I know I can just get the innerHTML and replace the font-size and color attributes from it. However, it may be possible that font-size and color may actually be part of the text instead of HTML tag.

So how can I remove these attributes from HTML without affecting the main text?

I am using Html2Canvas and jsPDF to create a canvass from a hidden div content, the core issue here is when I want to mount the canvass on the pdf,

what I am considering is, the items div could have 1 item and could have 1000, what I want to implement is the more items the smaller the items get on the canvass so they will always fit no matter how big or how small, any idea how to solve this? , another case here is how to create another pdf page if items don’t fit on a single page in case my previous question is impossible to implement.

const html2canvasfn = () => {
    html2canvas(
      document.getElementById('clone')!,
      {
        onclone: function (clonedDoc) {
          clonedDoc.getElementById('clone')!.style.display = 'flex';
        },
      }

    ).then((canvas) => {
      document.getElementById('clone')!.style.display = 'none';
      
      const imgData = canvas.toDataURL('image/png');
      // A4 size
      var doc = new jsPDF('p', 'mm', 'a4');
      
      var width = doc.internal.pageSize.getWidth();
      var height = doc.internal.pageSize.getHeight();
      let w = document.querySelector('#clone')!.scrollWidth;
      let h = document.querySelector('#clone')!.scrollHeight;
      
      doc.addImage(imgData, 'PNG', 30, 0, /*w!*/ /*1500 / 10*/ w! /*width*/ /*w!*/, /*height*/ /*h!*/ h!);
      doc.save('doc.pdf');
  
    });
  };

return (
<div style={{ textAlign: 'center' }}>
<Container id='clone' style={{ display: 'none', flexDirection: 'column', justifyContent:                'center', textAlign: 'center', minWidth: 900 }}>
{Object.entries(groupItems(context.exercises[mContext.modal.id])).map(([groupName, items]:             Mapped, i) => (
<div>
<ul>
{i + 1}
{Icons[groupName]}
{groupName}
</ul>
{items.map((el) => (
<li
el.text
/>
))}

</div>
))}
</Container>
</div>
  );
};

What I tried:

1. I tried work around it via if (browser), more specifically{
   if (!browser) { let DailyIframe = await import('daily-co/daily-js) } in the load function inside <script context="module"> ) so the code is always executed on the server). Then pass it as a prop to a component. However, although it worked on the server, the local dev environment re-runs the load function (which has to return an empty prop as it never imported anything) and overrides DailyIframe’s value (might be a bug with Vite/SvelteKit).

2. I tried to import the library in an end-point e.g. api.json.js instead, which is always executed on the server. However, it has to return a json, and I can’t pass an entire library variable onto it.

After research
It seems like a combination of problems from Vite, SvelteKit and certain libraries where global is undefined: SvelteKit With MongoDB ReferenceError: global is not defined)

But I cannot use his solution of putting it in an endpoint, because I need the DailyIframe and the mic audio stream from the client to create a video conference room

Also, why would certain libraries Daily (and looking at other related Stackoverflow posts, MongoDB) throw this error in the first place, while other libraries are safe to use?

Anyway suggestion is appreciated!

I’m trying to change the button’s icon and text onclick in a project (node js, javascript) using Bootstrap 5 (without jquery).
There are dozens of example of it, all using jquery with older versions of Bootstrap. Is there a way to do it in latest Bootstrap (without jquery)?

Hi,

I have this code:

inputform.addEventListener('keypress', function(e) {
 const tgt = e.target;
 
 if (tgt.id==="usermsg") {
  if (e.which == 13 && !e.shiftKey && tgt.value) {
    tgt.value = '';
    tgt.setSelectionRange(0,0);
  }
 }
});

as you hit ENTER its supposed to clear the textarea input and return the cursor to the start but it wont do it. Instead, the cursor stays at the second line. Here is the fiddle: https://jsfiddle.net/xbc0vong/

why is that?

Thank you.

I made a script that creates an HTML tag using JavaScript. I declared a variable called tag, specifically knowing you can’t delete() let and var variables, but it won’t automatically delete it in my code:

function(tagType, attr1 = null, value1 = null, attr2 = null, value2 = null, attr3 = null, value3 = null, attr4 = null, value4 = null, attr5 = null, value5 = null, attr6 = null, value6 = null, attr7 = null, value7 = null, attr8 = null, value8 = null, attr9 = null, value9 = null, attr10 = null, value10 = null) {
  tag = document.createElement(tagType);
  if (attr1 != null) {
    tag.setAttribute(attr1, value1)
  };
  if (attr2 != null) {
    tag.setAttribute(attr2, value2)
  };
  if (attr3 != null) {
    tag.setAttribute(attr3, value3)
  };
  if (attr4 != null) {
    tag.setAttribute(attr4, value4)
  };
  if (attr5 != null) {
    tag.setAttribute(attr5, value5)
  };
  if (attr6 != null) {
    tag.setAttribute(attr6, value6)
  };
  if (attr7 != null) {
    tag.setAttribute(attr7, value7)
  };
  if (attr8 != null) {
    tag.setAttribute(attr8, value8)
  };
  if (attr9 != null) {
    tag.setAttribute(attr9, value9)
  };
  if (attr10 != null) {
    tag.setAttribute(attr10, value10)
  };
  document.getElementsByTagName('head')[0].appendChild(tag);
  if (tag) {
    delete(this.tag);
  }
},

In the end of the code, I said delete(tag), and it didn’t work. So then I tried checking if variable named tag was there. if(tag) { delete(tag) }.

Why isn’t it automatically deleting the variable? If I just type delete(tag) into the console, it will delete it.

Thank you for your help!

I’m trying to retrieve a list of prisons which has a nested object address. It is structured like this:

  { uuid,
    address: {
      city,
      country,
      state,
      street,
      zip },
    prisonName,
    rules,
}

For the sake of simplicity all other objects are strings for now.

I’m getting the error “Error: Objects are not valid as a React child (found: object with keys {city, zip, state, country, street}). If you meant to render a collection of children, use an array instead.” but I’ve poured over my code a dozen times, I know I can’t render Address, it’s an object, not a string, but I don’t render it. I render properties of it, but never the whole object.

I even commented out any instances where I was console.logging the address just to be on the safe side.

prisons.js

import * as ActionTypes from './types'
import PrisonDataService  from '../services/prison.service'

export const createPrison = (prisonName, address, rules) => async (dispatch) => {
    try {
        const res = await PrisonDataService.create({ prisonName, address, rules })
        dispatch({
            type: ActionTypes.CREATE_PRISON,
            payload: res.data,
        });
        return Promise.resolve(res.data);
    } catch (err) {
        return Promise.reject(err)
    }
};

export const retrievePrisons = () => async (dispatch) => {
    try {
        const res = await PrisonDataService.getAll();
        dispatch({ //This is where the compiler says the error is
            type: ActionTypes.RETRIEVE_PRISONS,
            payload: res.data,
        });
    } catch (err) {
        console.log(err)
    }
};

export const updatePrison = (id, data) => async (dispatch) => {
    try {
      const res = await PrisonDataService.update(id, data);
  
      dispatch({
        type: ActionTypes.UPDATE_PRISON,
        payload: data,
      });
  
      return Promise.resolve(res.data);
    } catch (err) {
      return Promise.reject(err);
    }
  };
  
  export const deletePrison = (id) => async (dispatch) => {
    try {
      await PrisonDataService.delete(id);
  
      dispatch({
        type: ActionTypes.DELETE_PRISON,
        payload: { id },
      });
    } catch (err) {
      console.log(err);
    }
  };
  
  export const deleteAllPrisons = () => async (dispatch) => {
    try {
      const res = await PrisonDataService.deleteAll();
  
      dispatch({
        type: ActionTypes.DELETE_ALL_PRISONS,
        payload: res.data,
      });
  
      return Promise.resolve(res.data);
    } catch (err) {
      return Promise.reject(err);
    }
  };
  
  export const findPrisonByName = (name) => async (dispatch) => {
    try {
      const res = await PrisonDataService.findByName(name);
  
      dispatch({
        type: ActionTypes.RETRIEVE_PRISONS,
        payload: res.data,
      });
    } catch (err) {
      console.log(err);
    }
  };

prison-list.component.js

import React, { Component } from "react";
import { connect } from "react-redux";
import { Link } from "react-router-dom";
import { Button, Col, Input, InputGroup, Label, List, ListGroup } from "reactstrap";
import { retrievePrisons, findPrisonByName, deleteAllPrisons } from "../../actions/prisons";
import AddPrison from "./add-prison.component"

class PrisonsList extends Component {
  constructor(props) {
    super(props);
    this.onChangeSearchName = this.onChangeSearchName.bind(this);
    this.refreshData = this.refreshData.bind(this);
    this.setActivePrison = this.setActivePrison.bind(this);
    this.findByName = this.findByName.bind(this);
    this.removeAllPrisons = this.removeAllPrisons.bind(this);

    this.state = {
      currentPrison: null,
      currentIndex: -1,
      searchName: " ",
    };
  }

  componentDidMount() {
    this.props.retrievePrisons();
  }

  onChangeSearchName(e) {
    const searchName = e.target.value;

    this.setState({
      searchName: searchName,
    });
  }

  refreshData() {
    this.setState({
      currentPrison: null,
      currentIndex: -1,
    });
  }

  setActivePrison(prison, index) {
    console.log(prison)
    this.setState({
      currentPrison: prison,
      currentIndex: index,
    });
  }

  removeAllPrisons() {
    this.props
      .deleteAllPrisons()
      .then((response) => {
        console.log(response);
        this.refreshData();
      })
      .catch((e) => {
        console.log(e);
      });
  }

  findByName() {
    this.refreshData();
    this.props.findPrisonByName(this.state.searchName);
  }

  render() {
    const { searchName, currentPrison, currentIndex } = this.state;
    const { prisons } = this.props;

    console.log(prisons)

    return (
        <List className="row">
        <Col md="8">
          <InputGroup className="mb-3">
            <Input
              type="text"
              className="form-control"
              placeholder="Search by name"
              value={searchName}
              onChange={this.onChangeSearchName}
            />
            <div className="input-group-append">
              <Button
                outline
                color="secondary"
                onClick={this.findByName}
              >
                Search
              </Button>
            </div>
          </InputGroup>
        </Col>
        <div className="col-md-6">
          <h4>Prison List</h4>

          <ListGroup>
            {prisons &&
              prisons.map((prison, index) => (
                <li
                  className={
                    "list-group-item " +
                    (index === currentIndex ? "active" : "")
                  }
                  onClick={() => this.setActivePrison(prison, index)}
                  key={index}
                >
                  {prison.prisonName}
                </li>
              ))}
          </ListGroup>

          <Button
            color="danger"
            className="m-3"
            onClick={this.removeAllPrisons}
          >
            Remove All
          </Button>
        </div>
        <Col md={6}>
          {currentPrison ? (
            <div>
              <h4>Prison</h4>
              <div>
                <Label>
                  <strong>Prison Name:</strong>
                </Label>{" "}
                {currentPrison.prisonName}
              </div>
              <div>
                <Label>
                  <strong>Address:</strong>
                </Label>{" "}
                {currentPrison.address.street}
              </div>
              {/* {console.log(currentPrison.address)} */}
              <div>
                <Label>
                  <strong>UUID:</strong>
                </Label>{" "}
                {currentPrison.uuid}
              </div>
              <div>
                <Label>
                  <strong>Inmates:</strong>
                </Label>{" "}
                {currentPrison.inmates}
              </div>
                <Link
                to={"/prison/" + currentPrison.uuid}
              >
                Edit
              </Link>
            </div>
          ) : (
            <div>
              <br />
              <p>Please click on a Prison...</p>
            </div>
          )}
        </Col>
        <h1>Add Prison</h1>
        <AddPrison/>
      </List>    );
  }
}

const mapStateToProps = (state) => {
  return {
    prisons: state.prisons,
  };
};

export default connect(mapStateToProps, { retrievePrisons, findPrisonByName, deleteAllPrisons })(PrisonsList);

prison.component.js

import React, { Component } from "react";
import { connect } from "react-redux";
import { updatePrison, deletePrison } from "../../actions/prisons";
import PrisonDataService from "../../services/prison.service";
import { Button, Form, FormGroup, Input, Label } from "reactstrap"

class Prison extends Component {
  constructor(props) {
    super(props);
    this.onChangePrisonName = this.onChangePrisonName.bind(this);
    this.onChangeCity = this.onChangeCity.bind(this);
    this.onChangeCountry = this.onChangeCountry.bind(this);
    this.onChangeState = this.onChangeState.bind(this);
    this.onChangeStreet = this.onChangeStreet.bind(this);
    this.onChangeZip = this.onChangeZip.bind(this);
    this.onChangeRules = this.onChangeRules.bind(this);
    this.getPrison = this.getPrison.bind(this);
    this.updateStatus = this.updateStatus.bind(this);
    this.updateContent = this.updateContent.bind(this);
    this.removePrison = this.removePrison.bind(this);

    this.state = {
      currentPrison: {
        uuid: null,
        prisonName: " ",
        address: { 
            city: " ",
            country: " ",
            state: " ",
            street: " ",
            zip: " "
        },
        rules: " "
      },
      message: " ",
    };
  }

  componentDidMount() {
    console.log(this.props)
    this.getPrison(this.props.match && this.props.match.params.uuid);
  }

  onChangePrisonName(e) {
    const prisonName = e.target.value;

    this.setState(function (prevState) {
      return {
        currentPrison: {
          ...prevState.currentPrison,
          prisonName: prisonName,
        },
      };
    });
  }

  onChangeCity(e) {
    var newAddress = {...this.state.currentPrison.address}
    address.city = e.target.value;

    this.setState(function (prevState) {
      return {
        currentPrison: {
          ...prevState.currentPrison,
          address: newAddress,
        },
      };
    });
  }

  onChangeCountry(e) {
    var newAddress = {...this.state.currentPrison.address}
    address.country = e.target.value;

    this.setState(function (prevState) {
      return {
        currentPrison: {
          ...prevState.currentPrison,
          address: newAddress,
        },
      };
    });
  }

  onChangeState(e) {
    var newAddress = {...this.state.currentPrison.address}
    address.state = e.target.value;

    this.setState(function (prevState) {
      return {
        currentPrison: {
          ...prevState.currentPrison,
          address: newAddress,
        },
      };
    });
  }

  onChangeStreet(e) {
    var newAddress = {...this.state.currentPrison.address}
    address.street = e.target.value;

    this.setState(function (prevState) {
      return {
        currentPrison: {
          ...prevState.currentPrison,
          address: newAddress,
        },
      };
    });
  }

  onChangeZip(e) {
    var newAddress = {...this.state.currentPrison.address}
    address.zip = e.target.value;

    this.setState(function (prevState) {
      return {
        currentPrison: {
          ...prevState.currentPrison,
          address: newAddress,
        },
      };
    });
  }

  onChangeRules(e) {
    const rules = e.target.value;

    this.setState((prevState) => ({
      currentPrison: {
        ...prevState.currentPrison,
        rules: rules,
      },
    }));
  }

  getPrison(uuid) {
    PrisonDataService.get(uuid)
      .then((response) => {
        this.setState({
          currentPrison: response.data,
        });
        console.log(response.data);
      })
      .catch((e) => {
        console.log(e);
      });
  }

  updateStatus(status) {
    var address = {
      street: this.state.currentPrison.address.street,
      state: this.state.currentPrison.address.state,
      country: this.state.currentPrison.address.country,
      city: this.state.currentPrison.address.city,
      zip: this.state.currentPrison.address.zip
    }
    var data = {
      uuid: this.state.currentPrison.uuid,
      prisonName: this.state.currentPrison.prisonName,
      address: address,
      rules: this.state.currentPrison.rules,
    };

    this.props
      .updatePrison(this.state.currentPrison.uuid, data)
      .then((response) => {
        this.setState((prevState) => ({
          currentPrison: {
            ...prevState.currentPrison,
          },
        }));

        this.setState({ message: "The status was updated successfully!" });
      })
      .catch((e) => {
        console.log(e);
      });
  }

  updateContent() {
    this.props
      .updatePrison(this.state.currentPrison.uuid, this.state.currentPrison)
      .then((response) => {
        console.log(response);
        this.setState({ message: "The prison was updated successfully!" });
      })
      .catch((e) => {
        console.log(e);
      });
  }

  removePrison() {
    this.props
      .deletePrison(this.state.currentPrison.uuid)
      .then(() => {
        this.props.history.push("/prisons");
      })
      .catch((e) => {
        console.log(e);
      });
  }

  render() {
    const { currentPrison } = this.state;

    return (
      <div>
      {currentPrison ? (
        <div className="edit-form">
          <h4>Prison</h4>
          <Form>
            <FormGroup>
              <Label htmlFor="prisonName">Prison Name</Label>
              <Input
                type="text"
                className="form-control"
                id="prisonName"
                value={currentPrison.prisonName}
                onChange={this.onChangePrisonName}
              />
            </FormGroup>
            {/* {console.log(currentPrison.address)} */}
            {/* <FormGroup>
              <Label htmlFor="city">City</Label>
              <Input
                type="text"
                className="form-control"
                id="city"
                value={currentPrison.address.city}
                onChange={this.onChangeCity}
              />
            </FormGroup>
            <FormGroup>
              <Label htmlFor="country">Country</Label>
              <Input
                type="text"
                className="form-control"
                id="country"
                value={currentPrison.address.country}
                onChange={this.onChangeCountry}
              />
            </FormGroup>
            <FormGroup>
              <Label htmlFor="state">State</Label>
              <Input
                type="text"
                className="form-control"
                id="state"
                value={currentPrison.address.state}
                onChange={this.onChangeState}
              />
            </FormGroup>
            <FormGroup>
              <Label htmlFor="street">Street</Label>
              <Input
                type="text"
                className="form-control"
                id="street"
                value={currentPrison.address.street}
                onChange={this.onChangeStreet}
              />
            </FormGroup>
            <FormGroup>
              <Label htmlFor="zip">Zip</Label>
              <Input
                type="text"
                className="form-control"
                id="zip"
                value={currentPrison.address.zip}
                onChange={this.onChangeZip}
              />
            </FormGroup> */}
            <FormGroup>
              <Label for="rules">Rules</Label>
              <Input
                type="text"
                className="form-control"
                id="rules"
                value={currentPrison.rules}
                onChange={this.onChangeRules}
              />
            </FormGroup>
          </Form>

          <Button
          color="danger"
          onClick={this.removePrison}
          >
            Delete
          </Button>

          <Button
            type="submit"
            color="primary"
            onClick={this.updateContent}
          >
            Update
          </Button>
          <p>{this.state.message}</p>
        </div>
      ) : (
        <div>
          <br />
          <p>Please click on a Prison...</p>
        </div>
      )}
    </div>
    );
  }
}

export default connect(null, { updatePrison, deletePrison })(Prison);

add-prison.component.js

import React, { Component } from "react";
import { connect } from "react-redux";
import { Button, FormGroup, Label, Input } from "reactstrap";
import { createPrison } from "../../actions/prisons";

class AddPrison extends Component {
  constructor(props) {
    super(props);
    this.onChangeCity = this.onChangeCity.bind(this);
    this.onChangeCountry = this.onChangeCountry.bind(this);
    this.onChangeState = this.onChangeState.bind(this);
    this.onChangeStreet = this.onChangeStreet.bind(this);
    this.onChangeZip = this.onChangeZip.bind(this);
    this.onChangePrisonName = this.onChangePrisonName.bind(this);
    this.onChangeRules = this.onChangeRules.bind(this);
    this.savePrison = this.savePrison.bind(this);
    this.newPrison = this.newPrison.bind(this);

    this.state = {
      uuid: null,
      address: {
        city: " ",
        country: " ",
        state: " ",
        street: " ",
        zip: " ",
      },
      prisonName: " ",
      rules: " ",
    };
  }

  onChangeCity(e) {
    var newAddress = { ...this.state.address }
    newAddress.city = e.target.value
    this.setState({
      address: newAddress,
    });
  }
    
  onChangeCountry(e) {
    var newAddress = { ...this.state.address }
    newAddress.country = e.target.value
    this.setState({
      address: newAddress,
    });
  }

  onChangeState(e) {
    var newAddress = { ...this.state.address }
    newAddress.state = e.target.value
    this.setState({
      address: newAddress,
    });
  }

  onChangeStreet(e) {
    var newAddress = { ...this.state.address }
    newAddress.street = e.target.value
    this.setState({
      address: newAddress,
    });
  }

  onChangeZip(e) {
    var newAddress = { ...this.state.address }
    newAddress.zip = e.target.value
    this.setState({
      address: newAddress,
    });
  }

  onChangeRules(e) {
    console.log(e.target.value)
    this.setState({
      rules: e.target.value,
    })
  }

  onChangePrisonName(e) {
    console.log(e.target.value)
    this.setState({
      prisonName: e.target.value
    })
  }

  savePrison() {
    const { prisonName, address, rules } = this.state;
    console.log(address)
    this.props
      .createPrison(prisonName, address, rules)
      .then((data) => {
        this.setState({
          prisonName: data.prisonName,
          address: data.address,
          rules: data.rules,
        });
        console.log(data);
      })
      .catch((e) => {
        console.log(e);
      });
  }

  newPrison() {
    this.setState ({
      uuid: null,
      address: {
        city: " ",
        country: " ",
        state: " ",
        street: " ",
        zip: " ",
      },
      prisonName: " ",
      rules: "",
    });
  }

  render() {
    return (
      <div className="submit-form">
        {this.state.submitted ? (
          <div>
            <h4>You submitted successfully!</h4>
            <Button color="success" onClick={this.newPrison}>
              Add
            </Button>
          </div>
        ) : (
          <div>
            <FormGroup>
              <Label htmlFor="prisonName">Prison Name</Label>
              <Input
                type="text"
                className="form-control"
                id="prisonName"
                required
                value={this.state.prisonName}
                onChange={this.onChangePrisonName}
                name="prisonName"
              />
            </FormGroup>
            <FormGroup>
              <Label htmlFor="city">City</Label>
              <Input
                type="text"
                className="form-control"
                id="city"
                required
                value={this.state.address.city}
                onChange={this.onChangeCity}
                name="city"
              />
            </FormGroup>
            <FormGroup>
              <Label htmlFor="country">Country</Label>
              <Input
                type="text"
                className="form-control"
                id="country"
                required
                value={this.state.address.country}
                onChange={this.onChangeCountry}
                name="prison"
              />
            </FormGroup>
            <FormGroup>
              <Label htmlFor="state">State</Label>
              <Input
                type="text"
                className="form-control"
                id="state"
                required
                value={this.state.address.state}
                onChange={this.onChangeState}
                name="state"
              />
            </FormGroup>
            <FormGroup>
              <Label htmlFor="street">Street</Label>
              <Input
                type="text"
                className="form-control"
                id="street"
                required
                value={this.state.address.street}
                onChange={this.onChangeStreet}
                name="releaseDate"
              />
            </FormGroup>
            <FormGroup>
              <Label htmlFor="zip">Zip</Label>
              <Input
                type="text"
                className="form-control"
                id="zip"
                required
                value={this.state.address.zip}
                onChange={this.onChangeZip}
                name="releaseDate"
              />
            </FormGroup>
            <FormGroup>
              <Label htmlFor="rules">Rules</Label>
              <Input
                type="text"
                className="form-control"
                id="rules"
                required
                value={this.state.rules}
                onChange={this.onChangeRules}
                name="rules"
              />
            </FormGroup>

            <Button onClick={this.savePrison} color="success">
              Submit
            </Button>
          </div>
        )}
      </div>
    );
  }
}

export default connect(null, { createPrison })(AddPrison);

Another rookie issue im having guys. I assumed all my syntax was correct and all functions, variables and etc has been declared, but everytime i run the script i get this:

—-> Afri-culture.js:16

   Uncaught TypeError: Cannot read properties of null (reading 'addEventListener') <---

I have tried a few different solutions, but still keep getting the same issue, not really sure whats going on at all.
Can anyone here please lead me to the right direction. Here is the code from earlier:

const x = document.querySelector('x')
const overlay = document.querySelector('overlay')
const modal = document.querySelector('modal')

    const openOverlay = function() {
        modal.classList.remove('hidden');
        overlay.classList.remove('hidden');
    }
    
    const closeOverlay = function() {
        modal.classList.add('hidden');
        overlay.classList.add('hidden');
    }

    pop.addEventListener('click', openOverlay, false);
x.addEventListener('click', closeOverlay, false);
overlay.addEventListener('click', closeOverlay, false);


.pop {
    padding: 10px 15px;
    background: #4e8b8f;
    border: none;
    border-radius: 1.2px;
    font-family: Impact;
    color: black;
    margin-top: 10px;
    cursor: pointer;
}

.modal {
    background-color: #4e8b8f;
    border-radius: 1.3px;
    padding: 1rem;
    width: 15rem;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 6;
    font-family: Impact;
}

.x {
    position: absolute;
    top: 0;
    right: 0;
    background-color: transparent;
    border: none;
    border-radius: 1px;
    color:red;
    font-size: 10px;
    cursor: pointer;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(3px);
    border-radius: 2px;
    height: 100%;
    width: 100%;
    z-index: 5; 
}

.hidden {
    display: none;
} 

<!DOCTYPE html>
<html>

<!-----tab header---------------->

    <head>
        <title>Jalloh Web Construction Home</title>
        <link href=Afri-culture.css rel="stylesheet">
        <link rel="shortcut icon" type="image/jpg" href="jalloh white.jpg">
        <meta charset="utf-8" />
        </head>

        <header name="container">

            <!-----nav bar------>

            <div class="container">
              <img id="clarkweb" src="jalloh.jpg" alt="jalloh web construction">

                <nav>
                    <ul>
                     <!-----  <li><a href="https://www.etsy.com/shop/EastAmbienceLLC?ref=seller-platform-mcnav">Home</a></li>----->
                        <li><a href="https://www.linkedin.com/in/geedo-jalloh/">About Me</a></li>
                        <li><a href="#">My Hobbies</a></li>
                        <li><a href="#">Contact Me</a></li>
                    </ul>
                </nav>
            </div>
           
        </header>
        <h1>Welcome To My Portfolio</h1>
        <button class="pop">Enter</button>
        <div class="modal hidden">
    <br>
    <script src="Afri-culture.js"></script>
    <button class="x">x</button>
    <img src="smokegif.gif" id="smoke" alt="cyber smoke">
    <h3>Under Construction</h3>
                </div>
                <div class="overlay hidden"></div>
           
  
    
  

        <body id=body>
            <br>
               </body>
               
                               
    </div>
</div>
            </div>
            <hr>
            
    <div class="container2"> 
        <footer>
            <a href="https://twitter.com/GeedoJalloh"><img id="clarktwo" src="jalloh white.jpg" alt="clark web"></a>
        </footer> 
               
    </div> 
</html>```