123

Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

You're using npm packages, so we've auto-selected Babel for you here, which we require to process imports and make it all work. If you need to use a different JavaScript preprocessor, remove the packages in the npm tab.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Use npm Packages

We can make npm packages available for you to use in your JavaScript. We use webpack to prepare them and make them available to import. We'll also process your JavaScript with Babel.

⚠️ This feature can only be used by logged in users.

Code Indentation

     

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <p class="browser-alert">
    This page works best in browsers that support CSS Variables.
    <a href="https://caniuse.com/#search=css%20variables">More info</a>
</p>
<div class="wrapper">
    <div class="theme-editor-container">
        <h1>Theme Editor</h1>
        <section class="theme-editor">
            <section class="predefined-themes">
                <h2>Predefined Themes</h2>
                <button data-theme="green" style="background-color: #2eec96">
                    green
                </button>
                <button data-theme="blue" style="background-color: #3f51b5">
                    blue
                </button>
                <button data-theme="yellow" style="background-color: #ffeb3b">
                    yellow
                </button>
                <button data-theme="black" style="background-color: #222">
                    black
                </button>
                <button data-theme="white" style="background-color: white">
                    white
                </button>
            </section>
            <section class="colors">
                <h2>Colors</h2>
                <form>
                    <p class="color-picker">
                        <label for="background-color">Background Color</label>
                        <input type="color"
                               id="background-color"
                               value="#2eec96">
                    </p>
                    <p class="color-picker">
                        <label for="text-color">Text Color</label>
                        <input type="color" id="text-color" value="#000000">
                    </p>
                    <p class="color-picker">
                        <label for="label-color">Label Color</label>
                        <input type="color" id="label-color" value="#1a905d">
                    </p>
                </form>
            </section>
            <section class="typography">
                <h2>Typography</h2>
                <form>
                    <p>
                        <label for="base-font-size">Base Font Size</label>
                        <input type="range"
                               id="base-font-size"
                               min="12"
                               max="16"
                               step="1"
                               value="14">
                    </p>
                    <p>
                        <label for="base-line-height">Base Line Height</label>
                        <input type="range"
                               id="base-line-height"
                               min="1.2"
                               max="2.0"
                               step="0.1"
                               value="1.6">
                    </p>
                </form>
            </section>
        </section>
        <section class="theme-preview">
            <h1>A live theme editor with slick new CSS variables.</h1>
            <h2>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Ab
                aliquam eos quas. Ab amet dicta earum enim, esse
                excepturi.</h2>
            <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. A
                blanditiis commodi consequuntur delectus doloremque error esse
                mollitia nemo neque nesciunt nihil odit, perferendis
                praesentium, suscipit velit veniam voluptate. Autem, soluta!</p>
            <p>Et odit, totam! Accusantium deserunt earum laudantium molestiae
                praesentium quam reiciendis ut? Beatae harum numquam quisquam
                quod recusandae rem soluta sunt veniam. Animi doloremque
                exercitationem magnam recusandae repellendus similique,
                voluptas!</p>
        </section>
    </div>
</div>
            
          
!
            
              :root {
    --background-color: #2eec96;
    --text-color: #222;
    --label-color: #1a905d;
    --border-color: rgba(250, 250, 250, 0.5);
    --base-font-size: 14px;
    --base-line-height: 1.6;
}
.browser-alert {
    margin: 0;
    padding: 1rem;
    background-color: white;
    color: black;
}
.browser-alert a {
    color: inherit;
}
@supports (--css: variables) {
    .browser-alert {
        display: none;
    }
}
html,
body {
    min-height: 100%;
}
body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    font-size: var(--base-font-size);
    line-height: var(--base-line-height);
    font-weight: 300;
    color: var(--text-color);
    background-color: var(--background-color);
    transition: font-size 0.2s ease-in-out, line-height 0.2s ease-in-out, color 0.2s ease-in-out, background-color 0.2s ease-in-out;
}
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: inherit;
    line-height: calc(var(--base-line-height) * 0.85);
    transition: line-height 0.2s ease-in-out;
}
label {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--label-color);
}
.wrapper {
    max-width: 60rem;
    min-height: calc(100vh - 56px - 3rem);
    margin: 0 auto;
    padding: 1.5rem;
}
.theme-editor-container {
    width: 100%;
}
.theme-editor-container > h1 {
    margin-bottom: 2rem;
}
.theme-editor,
.theme-preview {
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
}
.theme-editor > section {
    margin-bottom: 2.5rem;
}
button[data-theme] {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    margin-right: 0.25rem;
    border: 1px solid var(--text-color);
    border-radius: 50%;
    font-size: 0;
    background: transparent;
    outline: 0;
    cursor: pointer;
}
.color-picker {
    display: flex;
    align-items: center;
}
.color-picker label {
    margin-right: 0.5rem;
}
.typography label {
    margin-right: 0.5rem;
}
input[type='color'] {
    width: 2rem;
    height: 2rem;
    border: 0;
    background: transparent;
    outline: 0;
}
input[type=range] {
    -webkit-appearance: none;
    background: transparent;
    outline: 0;
}
input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    margin-top: -5px;
    border-color: transparent;
    border-radius: 50%;
    background-color: var(--label-color);
    cursor: pointer;
}
input[type=range]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    margin-top: -5px;
    border-color: transparent;
    border-radius: 50%;
    background-color: var(--label-color);
    cursor: pointer;
}
input[type=range]::-ms-thumb {
    width: 18px;
    height: 18px;
    margin-top: -5px;
    border-color: transparent;
    border-radius: 50%;
    background-color: var(--label-color);
    cursor: pointer;
}
input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    border-radius: 12px;
    background-color: var(--border-color);
    transition: background-color 0.1s ease-out;
    cursor: pointer;
}
input[type=range]::-moz-range-track {
    width: 100%;
    height: 8px;
    border-radius: 12px;
    background-color: var(--border-color);
    transition: background-color 0.1s ease-out;
    cursor: pointer;
}
input[type=range]::-ms-track {
    width: 100%;
    border-width: 16px;
    border-color: transparent;
    border-radius: 12px;
    color: transparent;
    background-color: transparent;
    transition: background-color 0.1s ease-out;
    cursor: pointer;
}
input[type=range]::-ms-fill-lower {
    background-color: var(--border-color);
}
input[type=range]::-ms-fill-upper {
    background-color: var(--border-color);
}
.theme-preview > h1 {
    font-size: 2em;
}
@media (min-width: 50rem) {
    body {
        display: flex;
        flex-direction: column;
    }
    .wrapper {
        display: flex;
        flex: 1;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    .theme-editor-container {
        display: flex;
    }
    .theme-editor-container > * {
        padding: 0 0.5rem;
    }
    .theme-editor-container > h1 {
        flex: 1;
        margin-top: 1rem;
    }
    .theme-editor,
    .theme-preview {
        padding: 0 2rem;
        border: 0;
    }
    .theme-editor {
        flex: 2;
    }
    .theme-preview {
        flex: 3;
    }
    .color-picker,
    .typography form p {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
}
            
          
!
            
              const setValue = (property, value) => {
    if (value) {
        document.documentElement.style.setProperty(`--${property}`, value);

        const input = document.querySelector(`#${property}`);
        if (input) {
            value = value.replace('px', '');
            input.value = value;
        }
    }
};

const setValueFromLocalStorage = property => {
    let value = localStorage.getItem(property);
    setValue(property, value);
};

const setTheme = options => {
    for (let option of Object.keys(options)) {
        const property = option;
        const value = options[option];

        setValue(property, value);
        localStorage.setItem(property, value);
    }
}

document.addEventListener('DOMContentLoaded', () => {
    setValueFromLocalStorage('background-color');
    setValueFromLocalStorage('text-color');
    setValueFromLocalStorage('label-color');
    setValueFromLocalStorage('border-color');
    setValueFromLocalStorage('base-font-size');
    setValueFromLocalStorage('base-line-height');
});

const dataThemeButtons = document.querySelectorAll('[data-theme]');

for (let i = 0; i < dataThemeButtons.length; i++) {
    dataThemeButtons[i].addEventListener('click', () => {
        const theme = dataThemeButtons[i].dataset.theme;

        switch (theme) {
            case 'green':
                setTheme({
                    'background-color': '#2eec96',
                    'text-color': '#222222',
                    'label-color': '#1a905d',
                    'border-color': 'rgba(250, 250, 250, 0.5)'
                });
                return;

            case 'blue':
                setTheme({
                    'background-color': '#3f51b5',
                    'text-color': '#ffffff',
                    'label-color': '#ff5252',
                    'border-color': 'rgba(250, 250, 250, 0.5)'
                });
                return;

            case 'yellow':
                setTheme({
                    'background-color': '#ffeb3b',
                    'text-color': '#222222',
                    'label-color': '#ff5252',
                    'border-color': 'rgba(250, 250, 250, 0.5)'
                });
                return;

            case 'black':
                setTheme({
                    'background-color': '#222222',
                    'text-color': '#ffffff',
                    'label-color': '#ff5252',
                    'border-color': 'rgba(250, 250, 250, 0.5)'
                });
                return;

            case 'white':
                setTheme({
                    'background-color': '#ffffff',
                    'text-color': '#222222',
                    'label-color': '#ff5252',
                    'border-color': '#dddddd'
                });
                return;
        }
    })
}

const handleInputChange = (property, pixels) => {
    document.documentElement.style.setProperty(`--${property}`, `${event.target.value}${pixels ? 'px' : ''}`);
    localStorage.setItem(property, `${event.target.value}${pixels ? 'px' : ''}`);
};

document.querySelector('#background-color').addEventListener('change', event => {
    handleInputChange('background-color', false);
})

document.querySelector('#text-color').addEventListener('change', event => {
    handleInputChange('text-color', false);
});

document.querySelector('#label-color').addEventListener('change', event => {
    handleInputChange('label-color', false);
});

document.querySelector('#base-font-size').addEventListener('input', event => {
    handleInputChange('base-font-size', true);
});

document.querySelector('#base-line-height').addEventListener('input', event => {
    handleInputChange('base-line-height', false);
});
            
          
!
999px
🕑 One or more of the npm packages you are using needs to be built. You're the first person to ever need it! We're building it right now and your preview will start updating again when it's ready.

Console