Theory
Theory
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We retrieve data from the input field using input.value

We learned how to use the script to change the text on the page when the user submits the form. We have a newsletter subscription form, and now we need to inform the user that they have successfully subscribed to the newsletter. The message will look like this:

The e-mail address was added to our list of newsletter recipients.

The e-mail address in the message must be the one that was entered by the user. How can we get it?

The special property in the input fields (value) can help us out here. Suppose a page has an input input field:

<input type="text">

The boss passed by the office, and he entered his name there: “Muffin”. By using the value property, we can obtain data from this input field. And afterwards, we can display this data in the console, for example:

let input = document.querySelector('input');
console.log(input.value);
// Displays: Muffin

And we can display data from the input field directly on the page. Imagine that we have a paragraph on the page that we found and saved to the paragraph variable. We can do the following:

paragraph.textContent = input.value;

And now what the user entered in the input field will be displayed on the page as the textual content of the paragraph element.

In our case, the user enters their address in the field with the subscription-email class. Find it and tell JavaScript to display the received data on the page.

Why shouldn’t we read the text from the input field using textContent? If we tried to do this, then we would get an empty string. In JavaScript, form fields do not have textual content. Rather, their values are stored in value.

index.html
style.css
script.js

HTML

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <link rel="stylesheet" href="setting.css"> <link rel="stylesheet" href="style.css"> <title>FlashNews!</title> </head> <body class="page light-theme"> <header class="page-header"> <div class="container"> <a class="header-link" href="#">Main page</a> <button class="theme-button" type="button">Change the theme</button> </div> </header> <main class="inner-main"> <div class="container"> <h1 class="inner-heading">Subscribe to our newsletter</h1> <p class="subscription-message">We promise to send you news no more than once a day. We will only send you the most interesting and important stories.</p> <form action="https://echo.htmlacademy.ru/courses" method="post" class="subscription"> <div class="subscription-inner"> <label class="subscription-label" for="subscription-email">email</label> <input type="email" class="subscription-email" placeholder="muffin@flashnews.ru" value="" required id="subscription-email"> </div> <button class="button subscription-button" type="submit">Subscribe</button> </form> <section class="news-list list-tiles-view"> <h2 class="news-list-heading">Or continue reading more news stories.</h2> <article class="new-block"> <img src="img/new-graph.jpg" alt="New library"> <div class="new-block-text"> <h3>New graphics library</h3> <p>Now you can create a dashboard in just a matter of seconds.</p> <time datetime="2019-10-16">October 16, 2019</time> </div> </article> <article class="new-block"> <img src="img/new-robot.jpg" alt="What is going on with robots?"> <div class="new-block-text"> <h3>What is going on with robots?</h3> <p>A lot of interesting things are happening in robotics. This could be a piece of news about the latest developments, but that is not what this is.</p> <time datetime="2019-10-15">October 15, 2019</time> </div> </article> </section> </div> </main> <footer class="page-footer"> <div class="container"> <p>© FlashNews!</p> <a class="footer-logo"> <img src="img/white-logo.svg" alt="FlashNews! portal logo"> </a> </div> </footer> <script src="script.js"></script> </body> </html>

CSS

/* Light theme */ .light-theme { color: #333333; background-color: #eae9f2; } .light-theme .page-header { background-color: #ffffff; box-shadow: 0 2px 2px rgba(0, 0, 0, 0.2); } .light-theme .header-link { color: #6653d9; } .light-theme .header-link::before { background: url("img/arrow-back-light.svg") no-repeat 0 0; } .light-theme .theme-button { color: #6653d9; border: 1px solid #6653d9; } .light-theme .theme-button::before { background-image: url("img/moon-normal.svg"); } .light-theme .theme-button:focus, .light-theme .theme-button:hover { color: #ffffff; background-color: #6653d9; } .light-theme .theme-button:focus::before, .light-theme .theme-button:hover::before { background-image: url("img/moon-hover.svg"); } .light-theme .menu-open { background-color: #ffffff; background-image: url("img/menu-open-light.svg"); } .light-theme .menu-open:focus, .light-theme .menu-open:hover { background-color: #6653d9; background-image: url("img/menu-open-dark.svg"); } .light-theme .menu-close { background-color: #6653d9; } .light-theme .menu-close:focus, .light-theme .menu-close:hover { background-color: #473c8d; } .light-theme .main-menu { background-color: #6653d9; color: #ffffff; } .light-theme .main-menu a:focus, .light-theme .main-menu a:hover { background-color: #473c8d; } .light-theme .news-view button { border: 1px solid #6653d9; color: #6653d9; } .light-theme .news-view button:focus, .light-theme .news-view button:hover, .light-theme .news-view button:active, .light-theme .news-view .view-checked { background-color: #6653d9; color: #ffffff; } .light-theme .news-view .row-view:focus::before, .light-theme .news-view .row-view:hover::before, .light-theme .news-view .row-view:active::before { background-image: url("img/rows-light-checked.svg"); } .light-theme .news-view .tile-view:focus::before, .light-theme .news-view .tile-view:hover::before, .light-theme .news-view .tile-view:active::before { background-image: url("img/tiles-light-checked.svg"); } .light-theme .row-view::before { background-image: url("img/rows-light.svg"); } .light-theme .tile-view::before { background-image: url("img/tiles-light.svg"); } .light-theme .row-view::before { background-image: url("img/rows-light.svg"); } .light-theme .row-view.view-checked::before { background-image: url("img/rows-light-checked.svg"); } .light-theme .tile-view.view-checked::before { background-image: url("img/tiles-light-checked.svg"); } .light-theme .new-block { background-color: #ffffff; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2); } .light-theme .new-block time { color: #aaaaaa; } .light-theme .cookies-agreement { background-color: #fdeacd; box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.2); } .light-theme .button { background-color: #6653d9; color: #ffffff; } .light-theme .button:focus, .light-theme .button:hover { background-color: #473c8d; } .light-theme .page-footer { background-color: #6653d9; color: #ffffff; } .light-theme .subscription { background-color: #ffffff; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2); } .light-theme .subscription-message { background-color: #6653d9; color: #eae9f2; } .light-theme .subscription-message::before { background-image: url("img/icon-ok-light.svg"); } .light-theme .subscription-label { color: #6653d9; } .light-theme .subscription-email { border-bottom: 1px solid #6653d9; color: #333333; } /* Dark theme */ .dark-theme { color: #f2f2f2; background-color: #17161a; } .dark-theme .page-header { background-color: #373540; box-shadow: 0 2px 2px rgba(0, 0, 0, 0.6); } .dark-theme .header-link { color: #9484f2; } .dark-theme .header-link::before { background: url("img/arrow-back-dark.svg") no-repeat 0 0; } .dark-theme .theme-button { color: #9484f2; border: 1px solid #9484f2; } .dark-theme .theme-button::before { background-image: url("img/sun-normal.svg"); } .dark-theme .theme-button:focus, .dark-theme .theme-button:hover { color: #17161a; background-color: #9484f2; } .dark-theme .theme-button:focus::before, .dark-theme .theme-button:hover::before { background-image: url("img/sun-hover.svg"); } .dark-theme .menu-open { background-color: #373540; background-image: url("img/menu-open-dark.svg"); } .dark-theme .menu-open:focus, .dark-theme .menu-open:hover { background-color: #473c8d; background-image: url("img/menu-open-dark.svg"); } .dark-theme .menu-close { background-color: #473c8d; } .dark-theme .menu-close:focus, .dark-theme .menu-close:hover { background-color: #6653d9; } .dark-theme .main-menu { background-color: #473c8d; color: #f2f2f2; } .dark-theme .main-menu a:focus, .dark-theme .main-menu a:hover { background-color: #6653d9; } .dark-theme .news-view button { border: 1px solid #9484f2; color: #9484f2; } .dark-theme .news-view button:focus, .dark-theme .news-view button:hover, .dark-theme .news-view button:active, .dark-theme .news-view .view-checked { background-color: #9484f2; color: #17161a; } .dark-theme .news-view .row-view:focus::before, .dark-theme .news-view .row-view:hover::before, .dark-theme .news-view .row-view:active::before { background-image: url("img/rows-dark-checked.svg"); } .dark-theme .news-view .tile-view:focus::before, .dark-theme .news-view .tile-view:hover::before, .dark-theme .news-view .tile-view:active::before { background-image: url("img/tiles-dark-checked.svg"); } .dark-theme .row-view::before { background-image: url("img/rows-dark.svg"); } .dark-theme .tile-view::before { background-image: url("img/tiles-dark.svg"); } .dark-theme .row-view.view-checked::before { background-image: url("img/rows-dark-checked.svg"); } .dark-theme .tile-view.view-checked::before { background-image: url("img/tiles-dark-checked.svg"); } .dark-theme .new-block { background-color: #2a2930; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6); } .dark-theme .new-block time { color: #888888; } .dark-theme .cookies-agreement { background-color: #473c8d; box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.6); } .dark-theme .button { background-color: #9484f2; color: #17161a; } .dark-theme .button:focus, .dark-theme .button:hover { background-color: #b6aaff; } .dark-theme .page-footer { background-color: #0a0910; color: #f2f2f2; } .dark-theme .subscription { background-color: #2a2930; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6); } .dark-theme .subscription-message { background-color: #9484f2; color: #17161a; } .dark-theme .subscription-message::before { background-image: url("img/icon-ok-dark.svg"); } .dark-theme .subscription-label { color: #9484f2; } .dark-theme .subscription-email { border-bottom: 1px solid #9484f2; color: #f2f2f2; }

JavaScript

let page = document.querySelector('.page'); let themeButton = document.querySelector('.theme-button'); themeButton.onclick = function() { page.classList.toggle('light-theme'); page.classList.toggle('dark-theme'); }; let message = document.querySelector('.subscription-message'); let form = document.querySelector('.subscription'); // Declare a variable here form.onsubmit = function(evt) { evt.preventDefault(); // Change the value of textContent on the next line message.textContent = 'Form submitted!'; };

Click inside the mini browser to put the focus in this window.

Goalscompleted

On line 10, declare a variable email and write an element to it with the class subscription-email.
Inside the event handler, change the value of message.textContent from 'Form submitted!' to email.value.
In the mini-browser, click on the “Subscribe” button and make sure that the same address that was entered in the input field appears on the page.

We retrieve data from the input field using input.value

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