js--assignments/js--q1-7--patterns.html

<!-- 
Q1.7 WAP to print the following pattern by using JS:

[a] 
* 
* * 
* * * 
* * * *
* * * * *

[b] 
* * * * *
* * * *
* * *
* *
*
-->

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>JS Task 1.1</title>
    <link rel="stylesheet" href="style.css" />
    <style>
      main {
        display: flex;
        border: none;
      }
      form{
        row-gap: 1.5rem;
      }
      table {
        grid-template-columns: 0.8fr 0.8fr;
        row-gap: 1rem;
        padding: 0;
      }

      table tr {
        justify-content: center;
        align-items: center;
        border: 2px solid black;
        min-height: 5rem;
      }
      .container1,
      .container2 {
        box-sizing: border-box;
        font-size: 2rem;
        padding: 2rem;
      }
    </style>
  </head>
  <body>
    <main>
      <form action="">
        <h1>Print Star Patterns</h1>
        <label for="">
          Enter Number of Lines for pattern
          <input type="text" placeholder="Enter value.." />
        </label>
        <button type="button" onclick="printStars()">Print Pattern</button>
        <table>
          <tr>
            <td class="container1"></td>
            <td class="container2"></td>
          </tr>
        </table>
      </form>
    </main>
    <script>
      function printStars() {
        const line = document.querySelector("input").value;
        document.querySelector(".container1").innerHTML = "";
        document.querySelector(".container2").innerHTML = "";

        for (var row = 0; row <= line; row++) {
          console.log("--for loop executed--");
          for (var col = line; col > row; col--) {
            console.log("first loop", col);
            document.querySelector(".container1").innerHTML += "* &nbsp;";
          }
          for (var col = 0; col < row; col++) {
            console.log("second loop", col);
            document.querySelector(".container2").innerHTML += "* &nbsp;";
          }
          document.querySelector(".container1").innerHTML += "<br>";
          document.querySelector(".container2").innerHTML += "<br>";
          console.log("End of for loop");
        }
      }
    </script>
  </body>
</html>