Build a Spam Filter - Step 29

JavaScript
1

Tell us what’s happening:

Using the same syntax, update c to match c, {, [, and (.

Your code so far

<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width" />
    <title>Learn Regular Expressions by Building a Spam Filter</title>
    <link rel="stylesheet" href="styles.css" />
  </head>

  <body>
    <header class="main-text">
      <h1 class="title">Is this Spam?</h1>
      <p class="description">
        Enter a phrase to check if it would be marked as spam or not.
      </p>
    </header>

    <main>
      <label class="message-label" for="message-input">Message: </label>
      <textarea
        placeholder="Enter message here"
        value=""
        type="text"
        name="message"
        id="message-input"
        rows="10"
        cols="40"
      ></textarea>
      <button class="btn" id="check-message-btn" type="button">
        Check message
      </button>
      <p id="result-message"></p>
    </main>

    <footer class="footer">&copy; freeCodeCamp</footer>
    <script src="./script.js"></script>
  </body>
</html>

/* file: styles.css */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --dark-grey: #1b1b32;
  --light-grey: #f5f6f7;
  --golden-yellow: #fecc4c;
  --yellow: #ffcc4c;
  --gold: #feac32;
  --orange: #ffac33;
  --dark-orange: #f89808;
}

body {
  background-color: var(--dark-grey);
  color: var(--light-grey);
}

body,
#message-input:placeholder-shown {
  text-align: center;
}

textarea {
  max-width: 90%;
}

.main-text {
  margin: 25px 0;
}

.title {
  font-size: 2.5rem;
}

.description {
  margin-top: 15px;
  font-size: 1.4rem;
}

.message-label {
  display: block;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

#message-input:placeholder-shown,
textarea {
  font-size: 1.1rem;
}

.btn {
  display: block;
  cursor: pointer;
  width: 200px;
  margin: 10px auto;
  color: var(--dark-grey);
  background-color: var(--gold);
  background-image: linear-gradient(var(--golden-yellow), var(--orange));
  border-color: var(--gold);
  border-width: 3px;
}

.btn:hover {
  background-image: linear-gradient(var(--yellow), var(--dark-orange));
}

#result {
  font-size: 2rem;
  margin: 20px 0;
}

.footer {
  margin-top: 10px;
}

/* file: script.js */
const messageInput = document.getElementById("message-input");
const result = document.getElementById("result-message");
const checkMessageButton = document.getElementById("check-message-btn");

const helpRegex = /please help|assist me/i;
const dollarRegex = /[0-9]+\s*(?:hundred|thousand|million|billion)?\s+dollars/i;
const freeRegex = /(?:^|\s)fr[e3][e3] m[o0]n[e3]y(?:$|\s)/i;

// User Editable Region

const stockRegex = /[s5][t7][o0][c{\[\(][kK] [a@4][lL][e3][r7][t7]/i;


// User Editable Region


const denyList = [helpRegex, dollarRegex, freeRegex, stockRegex];

const isSpam = (msg) => denyList.some((regex) => regex.test(msg));

checkMessageButton.addEventListener("click", () => {
  if (messageInput.value === "") {
    alert("Please enter a message.");
    return;
  }

  result.textContent = isSpam(messageInput.value)
    ? "Oh no! This looks like a spam message."
    : "This message does not seem to contain any spam.";
  messageInput.value = "";
});

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36

Challenge Information:

Build a Spam Filter - Step 29

2

Please Tell us what’s happening in your own words.

Learning to describe problems is hard, but it is an important part of learning how to code.

Also, the more you say, the more we can help!

3

This is the updated code for stockRegex:

const stockRegex = /[s5][t7][o0][c{\[\(]k [a@4]l[e3]r[t7]/i;
4

are you having issues with this one?

6

Yes I’m having issues with it

7

what issues are you having?

8

Try removing the escape characters.

You can test your regex here to see if they work as expected: https://regex101.com/