Tips for dynamically appending a string to a predefined variable in React

Question

Tips for dynamically appending a string to a predefined variable in React

When I was working on creating a text input space using the input type area and utilizing the onChange utility, everything was running smoothly.

Now, my task is to incorporate an emoji bar and insert a specific emoji into the input space upon clicking it. Essentially, I am attempting to append or concatenate the emoji to the variable set as new_chat.

https://i.sstatic.net/XITSMYXc.png

Here are the set variables:

const [chats, setchat] = useState([]);
const [new_chat, set_new_chat] = useState([]);

Functions for managing chats:

function handlechat(event){
        set_new_chat(event.target.value);
    }

    function add_chat(){
        if(new_chat.trim()!=""){
            setchat(c => [...c, {text: new_chat, time: new Date()}]);
            set_new_chat("");
            // settime(t => [...t, new Date()]);
            console.log("new chat added");
        }
    }

Input text code:

<input type="text" id="input_text" value={new_chat} onChange={handlechat}></input>

Snippet for adding emojis:

<div className="emoji_container" style={{fontSize: "1.5em"}} onClick={new_chat.concat('👍')}>👍</div>

I would greatly appreciate any assistance!

I am currently struggling with incorporating emojis from an emoji panel into an input box.

javascript html css reactjs user-interface

Answer 1

Answer №1

Within your coding, you have successfully showcased how to update the state value of `new_chat` using the `set_new_chat` function in your `handlechat` function. It should follow the same principle when adding an emoji to it - updating state is essentially the same process, regardless of the text being updated.

To achieve this, create a handler that appends the emoji value to the state:

function handleEmoji(emoji){
  set_new_chat(`${new_chat}${emoji}`);
}

Invoke this handler by clicking on the desired emoji:

<div
  className="emoji_container"
  style={{fontSize: "1.5em"}}
  onClick={() => handleEmoji('👍')}
>👍</div>

Answer 2

Within your coding, you have successfully showcased how to update the state value of `new_chat` using the `set_new_chat` function in your `handlechat` function. It should follow the same principle when adding an emoji to it - updating state is essentially the same process, regardless of the text being updated.

To achieve this, create a handler that appends the emoji value to the state:

function handleEmoji(emoji){
  set_new_chat(`${new_chat}${emoji}`);
}

Invoke this handler by clicking on the desired emoji:

<div
  className="emoji_container"
  style={{fontSize: "1.5em"}}
  onClick={() => handleEmoji('👍')}
>👍</div>

Answer 3

Answer №2

here is a possible way to do it:

  const ChatApp = () => {
    const [messages, setMessages] = useState([]);
    const [newMessage, setNewMessage] = useState('');

    function handleInput(event) {
      setNewMessage(event.target.value);
    }

    function sendMessage() {
      if (newMessage.trim() !== '') {
        setMessages([...messages, { text: newMessage, time: new Date() }]);
        setNewMessage('');
        console.log('new message added');
      }
    }
    
    return (
      <div>
        <h1>Chat App</h1>
        <input
          type="text"
          value={newMessage}
          onChange={handleInput}
        ></input>
        <button onClick={sendMessage}>Send</button>
        
        <p>Your messages: {messages.map((m) => m.text)}</p>
        <p>Your new message: {newMessage}</p>
      </div>
    );
  };

  export default ChatApp;

Answer 4

here is a possible way to do it:

  const ChatApp = () => {
    const [messages, setMessages] = useState([]);
    const [newMessage, setNewMessage] = useState('');

    function handleInput(event) {
      setNewMessage(event.target.value);
    }

    function sendMessage() {
      if (newMessage.trim() !== '') {
        setMessages([...messages, { text: newMessage, time: new Date() }]);
        setNewMessage('');
        console.log('new message added');
      }
    }
    
    return (
      <div>
        <h1>Chat App</h1>
        <input
          type="text"
          value={newMessage}
          onChange={handleInput}
        ></input>
        <button onClick={sendMessage}>Send</button>
        
        <p>Your messages: {messages.map((m) => m.text)}</p>
        <p>Your new message: {newMessage}</p>
      </div>
    );
  };

  export default ChatApp;

Tips for dynamically appending a string to a predefined variable in React

Answer №1

Answer №2

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