Make your own JavaButton

index.html

<div class="javabo">
  <a href="javascript:void" class="redjavabo">
    今すぐダウンロード
  </a>
</div>

<p class="control">
  <label for="input">Your dream:</label>
  <input id="input" value="" placeholder="is ...?">
  <br>
  <a class="button" id="tweetlink" href="" target="_blink">Tweet</a>
  <!-- TODO: Replace navigator.share button -->
  <a class="button" id="permalink" href="" target="_top">🔗Link</a>
  <a class="button" id="download-link" href="javascript:void" title="今すぐダウンロード" target="_top">💾</a>
</p> 
<!--
<a href="https://github.com/arigato-java/java_images/tree/master/src/com/java/images/css">Original code is here.</a>
-->

make-your-own-javabutton.markdown

Make your own JavaButton

ジャバボタン画像ジェネレータ

Original code is https://github.com/arigato-java/java_images

A Pen by TOBY on CodePen.

License.

script.babel

// Constants and aliases 
const baseURL = 'https://codepen.io/tobynet/full/LagBKm';
const hashTag = '#JavaButtonMaker';
const q = document.querySelector.bind(document);

// Update the caption of the button
// (string, boolean) -> void
const setCaption = (text, allowsEmptyText) => {
  q('.redjavabo').textContent = text.trim();
 
  const caption = q('.redjavabo').textContent;
  const inputValue = allowsEmptyText ? "" : caption;
  const permalink = allowsEmptyText ? baseURL : makePermalink(caption).toString();
  
  q('#input').value = inputValue;
  q('#permalink').href = permalink;
  q('#tweetlink').href = makeTweetlink(caption, permalink, hashTag).toString(); 
}

// Get a permalink
// string -> URL
const makePermalink = (text) => {
  const url = new URL(baseURL);
  url.searchParams.set('j', text);

  return url;
}

// Get a tweetlink
// (string, string, string) -> URL 
const makeTweetlink = (text, permalink, hashTag) => {
  const tweet = text + ' ' + hashTag + ' ' + permalink;
  
  const url = new URL('https://twitter.com/intent/tweet?text=');
  url.searchParams.set('text', tweet);

  return url;
}

// Get random chars
// (number, number) -> string
const randomChar = (from, to) =>
      String.fromCharCode(
        from + Math.floor(Math.random()*(to - from)));
// Get random chars likea block
// () -> string
const randomCharOfBlock = () => randomChar(0x2580, 0x259F);

// Make random gabage text
// number -> string
const makeGlitchText = (length) =>
  Array(length).fill().map(randomCharOfBlock).join('');


document.addEventListener('DOMContentLoaded', () => {
  // Replace the caption of button by URL params like a `?j=🍣` 
  const params = new URLSearchParams(location.search);
  const caption = params.get('j') 
                || q('.redjavabo').textContent;
  setCaption(caption, false);

  // Replace the caption of button by URL
  q('#input').addEventListener('input', (event) => {
    const caption = event.target.value;
    if (caption) {
      setCaption(caption, false);
    } else {
      setCaption(makeGlitchText(10), true); 
    } 
  });
});

script.js

'use strict';

// Constants and aliases 
const baseURL = 'https://codepen.io/tobynet/full/LagBKm';
const hashTag = '#JavaButtonMaker';
const q = document.querySelector.bind(document);

// Update the caption of the button
// (string, boolean) -> void
const setCaption = (text, allowsEmptyText) => {
  q('.redjavabo').textContent = text.trim();
 
  const caption = q('.redjavabo').textContent;
  const inputValue = allowsEmptyText ? "" : caption;
  const permalink = allowsEmptyText ? baseURL : makePermalink(caption).toString();
  
  q('#input').value = inputValue;
  q('#permalink').href = permalink;
  q('#tweetlink').href = makeTweetlink(caption, permalink, hashTag).toString(); 
};

// Get a permalink
// string -> URL
const makePermalink = (text) => {
  const url = new URL(baseURL);
  url.searchParams.set('j', text);

  return url;
};

// Get a tweetlink
// (string, string, string) -> URL 
const makeTweetlink = (text, permalink, hashTag) => {
  const tweet = text + ' ' + hashTag + ' ' + permalink;
  
  const url = new URL('https://twitter.com/intent/tweet?text=');
  url.searchParams.set('text', tweet);

  return url;
};

// Get random chars
// (number, number) -> string
const randomChar = (from, to) =>
      String.fromCharCode(
        from + Math.floor(Math.random()*(to - from)));
// Get random chars likea block
// () -> string
const randomCharOfBlock = () => randomChar(0x2580, 0x259F);

// Make random gabage text
// number -> string
const makeGlitchText = (length) =>
  Array(length).fill().map(randomCharOfBlock).join('');

// Download node as image
// Element -> void
const downloadElementAsImage = (node) => {
  domtoimage.toBlob(node)
  .then(blob => {
    window.saveAs(blob, 'javabutton.png')
  })
  .catch(error => {
    console.error('Error: dom to image', error);
    // TODO: Show error dialog
    q('.redjavabo').textContent = '[Error] ' + error;
  });
};


document.addEventListener('DOMContentLoaded', () => {
  // Replace the caption of button by URL params like a `?j=🍣` 
  const params = new URLSearchParams(location.search);
  const caption = params.get('j') || q('.redjavabo').textContent;
  setCaption(caption, false);
  
  // Replace the caption of button by URL
  q('#input').addEventListener('input', (event) => {
    const caption = event.target.value;
    if (caption) {
      setCaption(caption, false);
    } else {
      setCaption(makeGlitchText(9), true); 
    }
  });
  
  // Download link
  q('#download-link').addEventListener('click', event => {
    event.preventDefault(); // ignore a[href]
    downloadElementAsImage(q('.redjavabo'));
  });
});

scripts

<script src="https://unpkg.com/dom-to-image-more@~2.7.5/src/dom-to-image-more.js"></script>
<script src="https://unpkg.com/file-saver@~2.0.0/dist/FileSaver.js"></script>

style.css

/* ここからカット */

/* Crimson Javabo */
a.redjavabo {
  font-size: 5em;
  line-height: 1.4em;
  
  display: inline-block;
  text-decoration: none;
  
  color: #fff;
  font-family: 'ＭＳ Ｐゴシック', Osaka, "Noto Sans", "Noto Sans CJK JP", sans-serif;
  font-weight: bold;
  background-color: #f00;
  border-radius: .4em;
  padding-top: 0.15em;
  padding-bottom: 0.2em;
  padding-left: 1em;
  padding-right: 1em;
  min-width: 1em;
  background-image: linear-gradient(to bottom, rgba(255,255,255,.17), rgba(255,255,255,.23) 40%, transparent 40%), linear-gradient(to bottom, #ff8791, #b50010);
  background-size: auto, auto;
  background-position: 0px 0px, 0px 0px;
  text-align: center;

  margin: 0;
  word-wrap: break-word;
}


/* Royal Blue Javabo */
a.bluejavabo{
  display: inline-block;
  padding-top: .5em;
  padding-bottom: .5em;
  padding-left: 2em;
  padding-right: 2em;
  min-width: 11em;
  text-decoration: none;
  color: #fff;
  font-family: 'ＭＳ Ｐゴシック', Osaka, "Noto Sans", "Noto Sans CJK JP", sans-serif;
  font-weight: normal;
  background-color: #007;
  border-radius: .8em;
  border: 2px solid #333;
  background-color: #007;
  background-image: linear-gradient(to bottom,rgb(125,227,255) 2px,rgb(39,181,247) 2px, rgb(7,123,242) 33%, rgb(0,32,115) 50%,rgb(0,34,70));
  text-align: center;
  margin: .5em;
}

/* ここまでカット */

/* pervasive */
body {
  font-family: sans-serif;
  text-align: center;
}

div.javabo {
  padding: 2em 2em;
}

input {
  line-height: 1.6em;
  font-size: 1.6em;
  border: 1px solid #cecece;
  border-radius: 9px;
  padding: 0.2em 0.6em;
  margin: 0.20em 0.25em;
  width: 10em;
}
input:active,
input:focus { 
  outline: 0;
  box-shadow: 0 0 0 0.11em rgba(120,0,10,0.10);
}
label {
  font-size: 1.2em;
}

.button {
  display: inline-block;
  margin: 0.4em 0.4em;
  padding: 0.4em 1.0em;
  border: 1px solid gray;
  border-radius: 9px;
  text-decoration-line: none; 
  font-weight: bold;
}
#tweetlink {
  color: white;
  border-color: #1b95e0;
  background-color: #1b95e0;
  min-width: 4em;
}

/* For mobile */
@media screen and (max-width: 500px) {
  a.redjavabo {
    font-size: 2.0em;
    
    padding-top: 0.4em;
    padding-bottom: 0.5em;
  }
  
  label[for="input"] {
    display: block;
  }
  input {
    font-size: 1.2em;
  }
}