social-media-cards/generator.html

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Generator kart na social media</title>
<style>
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@font-face {
font-family: Poppins;
src: url(./poppins.ttf);
}
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* {
font-family: "Noto Sans", sans-serif;
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}
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p {
font-family: Poppins;
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}
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#container.overflow {
display: grid !important;
--ratio: calc(var(--width-int) / var(--height-int));
--thumbnail-width: calc(
(var(--ratio) * var(--overflow-height)) * var(--scale)
);
--full-width: calc(var(--scale) * var(--overflow-width));
--margin: calc((var(--full-width) - var(--thumbnail-width)) / 2);
grid-template-columns: var(--margin) var(--thumbnail-width) var(
--margin
);
grid-template-areas: "margin-left thumbnail margin-right" "margin-left thumbnail margin-right";
width: var(--full-width) !important;
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height: calc(var(--scale) * var(--overflow-height)) !important;
grid-template-rows: 1fr 10fr;
background-color: var(--yellow);
}
#container.overflow #text_box {
grid-column: 2;
grid-row: 1;
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}
#container.overflow #image_box {
grid-column: 1/4;
grid-row: 2;
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}
#text_box {
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background-color: var(--yellow);
color: #fff;
display: grid;
grid-template-columns: 1fr min-content;
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}
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#text_target {
background-color: #000;
}
.overlay {
border: 1px solid red;
z-index: 1;
text-align: center;
opacity: 60%;
display: none;
}
.guides .overlay {
display: block;
}
.overlay--margin {
background-image: repeating-linear-gradient(
45deg,
#ccc,
#ccc 30px,
#dbdbdb 30px,
#dbdbdb 60px
);
}
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.overlay--margin-right {
grid-area: margin-right;
}
.overlay--margin-left {
grid-area: margin-left;
}
.overlay--thumbnail {
grid-area: thumbnail;
color: blue;
}
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</style>
</head>
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<body
style="
--yellow: #ffee2c;
--scale: 2;
--padding: 20px;
--width: 100px;
--height: 100px;
--overflow-width: 150px;
--overflow-height: 150px;
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display: flex;
"
class="guides"
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>
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<section style="margin-right: 20px">
<h1>Generator kart na social media</h1>
<textarea id="text" style="width: 600px; height: 120px">
Treść komunikatu</textarea
>
<br />
<input id="file" type="file" accept="image/png, image/jpeg" />
<br />
<select id="size" onchange="resize()"></select>
<select id="scale_picker" onchange="rescale()">
<option value="1">1x</option>
<option value="2" selected>2x</option>
<option value="3">3x</option>
</select>
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<input type="checkbox" id="overflow" onchange="reoverflow()" /><label
for="overflow"
>
Tryb overflow
</label>
<input type="checkbox" id="guides" onchange="reguides()" checked /><label
for="guides"
>
Pokaż prowadnice
</label>
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</section>
<section>
<h2>Twitter</h2>
<div
id="container"
style="
box-sizing: border-box;
display: flex;
flex-flow: column;
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width: calc(var(--scale) * var(--width));
height: calc(var(--scale) * var(--height));
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"
>
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<div id="text_box">
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<p
id="text_target"
style="
font-size: calc(var(--scale) * 16px);
padding: var(--padding);
"
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>
Treść komunikatu
</p>
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<img
src="./logo.png"
width="80"
height="80"
style="
height: calc(var(--scale) * 80px);
width: calc(var(--scale) * 80px);
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padding-left: var(--padding);
justify-self: flex-end;
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"
/>
</div>
<div
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id="image_box"
style="flex-grow: 1; position: relative; overflow: hidden"
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>
<div
id="image_blur"
style="
height: 100%;
width: 100%;
background-size: cover;
background-position: center;
background-repeat: no-repeat;
position: absolute;
filter: blur(10px);
"
></div>
<div
id="image"
style="
height: 100%;
width: 100%;
background-size: contain;
background-position: center;
background-repeat: no-repeat;
position: absolute;
"
></div>
</div>
<div class="overlay overlay--margin overlay--margin-left">
ucięte z lewej
</div>
<div class="overlay overlay--margin overlay--margin-right">
ucięte z prawej
</div>
<div class="overlay overlay--thumbnail">widoczne na miniaturce</div>
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</div>
</section>
</body>
<script>
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const body = document.querySelector("body");
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const sizes = {
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"Twitter - 1 zdjęcie": {
thumbnail_size: [512, 313],
overflow_size: [1024, 768],
},
"Twitter - 2 zdjęcia": {
thumbnail_size: [377, 434],
overflow_size: [1024, 768],
},
"LinkedIn - 1 zdjęcie": {
thumbnail_size: [540, 346],
overflow_size: [733, 723],
},
"LinkedIn - 2 zdjęcia": {
thumbnail_size: [270, 552],
overflow_size: [733, 723],
},
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};
for (const value of Object.keys(sizes)) {
const option = document.createElement("option");
option.value = value;
option.textContent = value;
size.appendChild(option);
}
function toBase64(file) {
return new Promise((resolve) => {
const FR = new FileReader();
FR.addEventListener("load", (e) => {
resolve(e.target.result);
});
FR.readAsDataURL(file);
});
}
function refreshText() {
text_target.innerHTML = text.value.replace(/\n/, "<br/>");
}
const refreshImage = async () => {
image.style.backgroundImage = `url("${await toBase64(file.files[0])}")`;
image_blur.style.backgroundImage = `url("${await toBase64(
file.files[0]
)}")`;
};
const resize = () => {
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const scale = parseInt(body.style.getPropertyValue("--scale"));
const [width, height] = sizes[size.value].thumbnail_size;
const [overflow_width, overflow_height] = sizes[size.value].overflow_size;
body.style.setProperty("--width", width + "px");
body.style.setProperty("--height", height + "px");
body.style.setProperty("--width-int", width);
body.style.setProperty("--height-int", height);
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body.style.setProperty("--overflow-width", overflow_width + "px");
body.style.setProperty("--overflow-height", overflow_height + "px");
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};
function rescale() {
document
.querySelector("body")
.style.setProperty("--scale", scale_picker.value);
resize();
}
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function reoverflow() {
const should_overflow = overflow.checked;
if (should_overflow) {
container.classList.add("overflow");
} else {
container.classList.remove("overflow");
}
}
function reguides() {
const should_guides = guides.checked;
if (should_guides) {
body.classList.add("guides");
} else {
body.classList.remove("guides");
}
}
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refreshText();
refreshImage();
resize();
rescale();
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reoverflow();
reguides();
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text.oninput = refreshText;
file.onchange = refreshImage;
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/* [1014, 723] -- linked in */
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</script>
</html>