Guide on creating a cookie verification process with no contents

Question

Guide on creating a cookie verification process with no contents

Request for Assistance:

let cartHelper = {
    cartCookieName: "_cart",

    getCart: function (callback = undefined) {
        return apiHelper.getRequest(
            "/carts",
            (response) => {   
                document.cookie = `${this.cartCookieName}=${response.data.attributes.cart_guid};`;
                if (callback) { callback(); }
            },
        )
    },
}

I am seeking guidance on implementing a check to call the getCart function only if " _cart" is empty. Specifically, the getCart function should be triggered when a button is clicked. This function makes an API call to obtain the cart_guid and stores it in a cookie. My objective is to skip creating the cookie with cartguid if the cart_guid already exists in the cookie.

Thank you for your assistance!

javascript cookies document setcookie

Answer 1

Answer №1

<!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>
    <style></style>
  </head>
  <body>
    <button onclick="checkCookie()">Check Cookie</button>
    <p>Click the button to verify the cookie..!</p>
  </body>
  <script>
    function getCookieValue(name) {
      var dc = document.cookie;
      var prefix = name + "=";
      var startingIndex = dc.indexOf("; " + prefix);
      if (startingIndex == -1) {
        startingIndex = dc.indexOf(prefix);
        if (startingIndex != 0) return null;
      } else {
        startingIndex += 2;
        var endingIndex = document.cookie.indexOf(";", startingIndex);
        if (endingIndex == -1) {
          endingIndex = dc.length;
        }
      }
      return decodeURIComponent(dc.substring(startingIndex + prefix.length, endingIndex));
    }

    function checkIfCookieExists() {
      var myCookie = getCookieValue("CookieName");

      if (myCookie == null) {
        console.log(
          "%ccookie does not exist",
          "color:white;background: red;padding: 2px 10px;"
        );
      } else {
        console.log(
          "%ccookie exists",
          "color:white;background: green;padding: 2px 10px;"
        );
      }
    }
  </script>
</html>

Answer 2

<!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>
    <style></style>
  </head>
  <body>
    <button onclick="checkCookie()">Check Cookie</button>
    <p>Click the button to verify the cookie..!</p>
  </body>
  <script>
    function getCookieValue(name) {
      var dc = document.cookie;
      var prefix = name + "=";
      var startingIndex = dc.indexOf("; " + prefix);
      if (startingIndex == -1) {
        startingIndex = dc.indexOf(prefix);
        if (startingIndex != 0) return null;
      } else {
        startingIndex += 2;
        var endingIndex = document.cookie.indexOf(";", startingIndex);
        if (endingIndex == -1) {
          endingIndex = dc.length;
        }
      }
      return decodeURIComponent(dc.substring(startingIndex + prefix.length, endingIndex));
    }

    function checkIfCookieExists() {
      var myCookie = getCookieValue("CookieName");

      if (myCookie == null) {
        console.log(
          "%ccookie does not exist",
          "color:white;background: red;padding: 2px 10px;"
        );
      } else {
        console.log(
          "%ccookie exists",
          "color:white;background: green;padding: 2px 10px;"
        );
      }
    }
  </script>
</html>

Guide on creating a cookie verification process with no contents

Answer №1

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