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Insecure Resource

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

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JavaScript

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HTML 

              
                <form class='row' action="POST" action="https://httpbin.org/forms/post" novalidate>
    <section class='column'>
        <fieldset>
            <div class="field">
                <input id='goodbye' type='text' pattern='Goodbye' title='Valid when "Goodbye"' autocomplete="off" required/>
                <label for='goodbye'>You say "Goodbye"</label>
                <span class='error'>Only valid when "Goodbye"</span>
            </div>
        </fieldset>        
        
        <fieldset>
            <div class="field">
                <input id='hello' type='text' pattern='Hello' title='Valid when blank or "Hello"' autocomplete="off" placeholder="Hello?"/>
                <label for='hello'>And I say "Hello"... maybe?</label>
                <span class='error'>Valid when blank or "Hello"</span>
            </div>
        </fieldset>
        
        <button type='submit'>Submit</button>
        <button type='button'>Reset</button>
    </section>
</form>
!

CSS 

              
                @use postcss-cssnext;
@use postcss-apply;
@use postcss-custom-media;
@use postcss-nested;
@use postcss-mixins;
@use lost;
@lost flexbox flex;

:root {
    --color-dark-gray: #373B44;
    --color-red: #BD5532;
    --color-green: #73C8A9;
    --color-wheat: #E1B866;
    --color-muted-wheat: color(var(--color-wheat) blackness(60%));
    --color-tan: #DEE1B6;
    --label-font-size: 1.5rem;
    
    --neutral {
        border-color: var(--color-wheat);
        color: var(--color-wheat);
        
        & ~ label {
            color: var(--color-muted-wheat);
        }

        &:required ~ label:before {
            color: var(--color-tan);
        }
    }
    --invalid {
        border-color: var(--color-red);
        color: var(--color-red);
        box-shadow: 0 5px 5px color(var(--color-red) blackness(75%));
        
        & ~ label,
        &:required ~ label:before {
            color: var(--color-red);
        }
        
        & ~ .error {
            display: block;
        }
    }
    --valid {
        border-color: var(--color-green);
        color: var(--color-green);
        
        & ~ label,
        &:required ~ label:before {
            color: var(--color-green);
        }
    }
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--color-dark-gray);
    font-family: 'Droid Sans', sans-serif;
}

.row {
    lost-center: 50%;
    lost-align: middle-center;
}

.column {
    lost-column: 1;
}

form {
    height: 100vh;

    fieldset {
        border: none;
    }
    
    .field {
        position: relative;
        padding-top: calc( var(--label-font-size) + 1rem); /* Allow label to show above */
        margin-bottom: 1rem;
    }

    label {
        font-family: 'Oswald', sans-serif;
        display: block;
        position: absolute;
        top: 0;
        font-size: var(--label-font-size);
        color: var(--color-muted-wheat);
        text-transform: uppercase;
        white-space: nowrap;
    }
    
    input {
        @apply --neutral;
        border: 5px solid;
        box-shadow: 0 5px 5px rgba(0, 0, 0, 0.5);
        padding: 1rem;
        border-radius: 5px;
        width: 100%;
        font-size: 2rem;
        outline: none;
        
        &:required ~ label:before {
            content: '*';
            margin-right: 5px;
        }
        
        &::placeholder {
            color: color(var(--color-muted-wheat) alpha(20%));
        }
    }

    .error {
        display: none;
        color: var(--color-red);
        margin: 1rem 0 1rem 1.2rem;
    }

    button {
        background-color: var(--color-dark-gray);
        border: 3px solid var(--color-muted-wheat);
        color: var(--color-muted-wheat);
        padding: 0.75rem;
        border-radius: 5px;
        box-shadow: 0 3px 3px rgba(0, 0, 0, 0.5);
        margin: 1rem;
        font-weight: bold;
        text-transform: uppercase;
        cursor: pointer;
        outline: none;
        transition: all 0.15s ease-out;

        &:hover, &:focus {
            border-color: var(--color-tan);
            color: var(--color-tan);
            
        }
    }
}

/* 
    If it's valid, mark it as so.
*/
form input:valid {
    @apply --valid;
}

/* 
    This is for optional input elements that are empty (because placeholder is showing).
    The input will at least need a placeholder with a single space in order for this to work.
    
    Example: <input placeholder=" " />
*/
form input:optional:valid:placeholder-shown,
form input:optional:valid:placeholder-shown:focus {
    @apply --neutral;
}

/*
    Whenever the form is submitted and invalid, we'll put a "submitted" class on the form.
    This will then show the valid/invalid state of the inputs.
    It will also allow all inputs to show their valid/invalid on changes.
*/
/* Uncomment below to allow state update on focus */
/* form input:focus, */
form.submitted input {
    &:invalid {
        @apply --invalid;
    }

    /* Needed to specify optional as there not enough specificity when the input is empty */
    &:valid,
    &:optional:valid,
    &:optional:valid:placeholder-shown:focus {
        @apply --valid;
    }
}
!

JS 

              
                // ---
// --- Form
// ---

const form = document.forms[0];

function markFormSubmitted() {
    form.classList.add("submitted");
}

function onSubmit(e) {
    
    // This will force HTML validation even if we mark the form as 'novalidate'
    if ( !this.reportValidity() ) {
        e.preventDefault();
        markFormSubmitted();
    } else {
        alert('Form is valid!');
    }

    e.preventDefault(); // Should be removed when you actually want to submit
}

form.addEventListener("submit", onSubmit);

// ---
// --- Reset Button
// ---

const reset = document.querySelector("button[type=button]");

reset.addEventListener("click", () => {
    form.reset();
    form.classList.remove("submitted");
});
!
999px

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