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why my screen is blank when I enter npm start?
When you enter npm start in the terminal, it is likely trying to start your application. However, a blank screen often means that there is an error in your code. You can try checking the console in your browser's developer tools to see if there are any error messages that can point you in the right direction. It may also be helpful to check your terminal for any error messages related to running the command.
when i run npm start in my terminal it gives errors. What do i do
If you are running npm start in your terminal and it's giving you errors, there are a few things you can do troubleshooting:
Check your code and make sure there aren't any typos, syntax errors, or other mistakes that could be causing the errors.
Check that you have all the necessary dependencies installed. You can do this by running npm install in your terminal.
Make sure that you are in the correct directory where your code and package.json are located.
Check your terminal for any error messages that may help you identify the issue. Consider searching the error message in your search engine, like Google, to find help from other developers who may have encountered similar issues.
If you are still having trouble solving the issue, you can try reaching out to the community by posting a question on websites like Stack Overflow or Github.
Here is an example of code block in JavaScript:
javascript Copy code
// This is an example of code that could cause errors when using npm start
const wrongSyntax
function (myFunction) {
console.log("This function does nothing.")
}
Note that the above code may not be the cause of your error, it's just an example of code that has syntax errors.
π©βπ» how can i solve this issue Titles.js:11 Uncaught TypeError: Cannot read properties of undefined (reading 'cityName') at Titles (Titles.js:11:1) at renderWithHooks (react-dom.development.js:16305:1) at mountIndeterminateComponent (react-dom.development.js:20074:1) at beginWork (react-dom.development.js:21587:1) at HTMLUnknownElement.callCallback (react-dom.development.js:4164:1) at Object.invokeGuardedCallbackDev (react-dom.development.js:4213:1) at invokeGuardedCallback (react-dom.development.js:4277:1) at beginWork$1 (react-dom.development.js:27451:1) at performUnitOfWork (react-dom.development.js:26557:1) at workLoopSync (react-dom.development.js:26466:1)
The error message "Uncaught TypeError: Cannot read properties of undefined (reading 'cityName')" means that the 'cityName' property is undefined and cannot be read. This can happen when trying to access properties of objects that do not exist.
To solve this issue, you need to make sure that the 'cityName' property is defined before trying to access it. You also need to make sure that the component that is trying to access this property is receiving the prop that it needs.
Here's an example of what it could look like in a React component:
javascript Copy code
import React from 'react';
function Titles(props) {
return (
<div>
<h1>{props.cityName ? props.cityName : 'No City Name Found'}</h1>
<h2>Welcome to my Weather App!</h2>
</div>
);
}
export default Titles;
In the example above, we check if the 'cityName' prop exists before trying to access it. If it does not exist, we display a message saying that no city name was found.
Keep in mind that this is just an example, and your solution will depend on your specific code and requirements.
π©βπ» given this code import React from "react"; import "bootstrap/dist/css/bootstrap.min.css"; import ReactAnimatedWeather from "react-animated-weather"; import FormatDate from "./FormatDate"; import "./titles.css"; function Titles(props) { return ( <div className="Titles"> <h5 id="city-name">{props.info.cityName}</h5>
The code you provided is a React component that renders a title section for a weather app. It imports other components like "bootstrap" and "react-animated-weather" as well as "FormatDate" and an accompanying CSS file.
The component renders an HTML element "div" with a class name "Titles". Inside of that div, there is an h5 element with an id "city-name". The content of this element is obtained from a prop called "props.info.cityName".
Based on the code provided it is not possible to determine, whether there are any errors or not. Please provide more information about the components and props being passed in, in case you are experiencing errors.
π©βπ» here is the code from which the props.info is being imported import React, { useState } from "react"; import "bootstrap/dist/css/bootstrap.min.css"; import axios from "axios"; import Titles from "./Titles"; import "./container.css"; function Container() { const [weatherData, setWeatherData] = useState({ ready: false }); function showTemperature(response) { console.log(response.data); setWeatherData({ ready: true, temperature: response.data.main.temp, description: response.data.weather[0].description, tempmax: response.data.main.temp_max, tempmin: response.data.main.temp_min, feelslike: response.data.main.feels_like, wind: response.data.wind.speed, humidity: response.data.main.humidity, cityName: response.data.name, date: new Date(response.data.dt * 1000), }); }
The code you provided is a React component "Container". It imports other components like "bootstrap" and "axios" as well as "Titles" and an accompanying CSS file.
The component contains a useState hook that initializes weatherData as an object with a ready property set to false.
The component defines the function showTemperature(response) that is called in response to an API request. The response parameter is an object with information about the weather. The function updates the weatherData state with the relevant weather information obtained from the API response such as temperature, description, and date amongst others.
The cityName property received in the Titles component is updated with the city name obtained from the API response. This is used to display the city name on the web page.
It is possible that if the API response does not contain any data, calling the showTemperature() function may not update weatherData, and thus props.info.cityName may throw an error when accessed in the Titles component.
Write me a function so that a timer starts again when a new quiz question is displayed.
javascript Copy code
// HTML and CSS code blocks are not required to complete this task.
// JavaScript code
function startTimer() {
// code to start the timer
}
function displayQuizQuestion() {
// code to display the quiz question
startTimer(); // call the startTimer function to start the timer again
}
Conο¬gure the file package.json to run node index.js by the command npm start:
To conο¬gure a package.json file to run node index.js by the npm start command, you should add a "scripts" key to the package.json file containing a start command that specifies the file to be run when the npm start command is run:
json Copy code
{
"name": "my-sample-app",
"version": "1.0.0",
"scripts": {
"start": "node index.js"
}
}
When npm start is run, it will execute the command node index.js, which will run the index.js file.
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AI stands for Artificial Intelligence. AI bots are able to learn from conversations with users and expand their knowledge this way.
SheCodes Athena will help you with technical questions about your code using artificial intelligence to find the answer. Imagine a super powerful human who has memorized everything on the internet and can access that knowledge in a matter of seconds. π€―
SheCodes Athena can answer most coding-related questions, even complicated ones! It can even find bugs in your code and tell you how to fix them in just a few seconds. Impressive, right?
Just remember we're still in testing mode so the AI may return strange or incorrect replies. Feel free to message us if this happens!
SheCodes Athena can only reply to coding-related technical questions. The same type of questions you would ask in the channels on Slack.
For questions that are not coding-related, write us here π
You should treat Athena like a SheCodes team member, so always be polite! π Ask your questions as detailed as possible, just like you would do on Slack.
Here are some examples:
- Prettier isn't working on my VS Code. How do I fix this?
- How do I make bullet points with different colors using the list element?
- My code in Codesandbox is having some issues. Can you please tell me what the issue is? [Include the link to your Codesandbox]
For now, SheCodes Athena is limited to 5 questions per day for each student.
In that case, you can either ask SheCodes Athena a follow-up question, or you can post on the designated weekly channel on Slack!
Our technical assistants are still available on Slack and are always happy to help! ππͺ
Remember, questions are limited to 1000 characters.
- If you're working with an HTML file: Post a snippet of your code related to the issue you're having (just copy the code and paste it into the question box).
- If you're working with Codesandbox: Good news, you can just post the link to your Codesandbox and the AI Assistant will be able to view your code.
- If you have a longer question that would require an entire HTML file or more than 1000 characters, post it in the designated weekly channels on Slack! π
Athena was the Greek goddess of wisdom, among other elements. She received her name from the city of Athens, which she is known for protecting.
Much like the goddess Athena, SheCodes Athena is also incredibly wise and can solve complicated coding puzzles in a matter of seconds! π
Not likely. AI can automate tasks and make developers' jobs more efficient but it can't fully replace the human ability to deal with complex software. And AI will still require human developers to supervise and improve it further.
So developers may see their tasks change but they won't be replaced by AI. π©βπ»π€π»