誰にも求められていないモノを作る技術

Be Crazy!!!

（この記事は ちゅらデータ Advent Calendar 2021 16日目 の記事となります）

ネタすぎるのでQiita→Zennに書くことじゃないって怒られたら個人ブログに移動します

皆様、404ページ好きですか？

弊社の404ページは前々からイケてないなって思っていました。（個人の感想です）

https://churadata.okinawa/aipa-dead-shark-3

存在しないリンクに飛んでみてください。

ほらね、Topページへリダイレクト。イケてない（個人の感想です）

ぐぐってみると、よさそうな404ページはたくさんありますね。皆様遊び心満載です。

果たしてそれでいいのか？？？

ぼくの心の中のちゅらデータが言います。

？？？）「本当にそれでいいのか？」

※弊社社長作

aipa）「！？　ちゅら太郎！？？」

ちゅら太郎）「あきらめたら、そこで 案件終了 だよ・・・・？」

aipa）「・・・・・・・！」

ちゅら太郎）「だから泣くな」

aipa）「だって、、、ちゅら太郎、、、 袖がっ！！！！ 」

aipa）「わかったよ、僕泣かない。ちゅら太郎！！！ぼくがんばる、社長みたいな Be Crazy になる」

真面目にやります

世界にふたつとない404ページを作って、社長にプレゼンしようと思います。今回はその過程を共有いたします。

準備

• Google Chrome
• Developer tools

今回はすべてDeveloper toolsでやります。

元のページ

https://churadata.okinawa/service/

適当に選んだサービスページでやります。

404の文字に差し替える

はい、完成しました。どうもありがとうございました。

異常です

ここでやめたらちゅら太郎との 茶番 約束が違いますよね。もっと頑張ってみます。

ふぁんきーにしてみる

さて、普通。ページのコンテンツを用意するときは企画やら目的があり、何を伝えたいかをまず先に決めたりするのですが、今回は時間もないので、 クレイジーだなー が伝わればいいかなって思います。

もう一度来てみたい と思わせることが大事かなと思います。

すぐ簡単にできそうな案としては、アニメーションです。その昔はJavaScript使わないとできなかったことですが、なんとこの記事のタグにもあるCSSである程度は動かせるんですよね。

アニメーションでUX（？？？）を刺激することができたら勝ちなんじゃないでしょうか。

とりあえずやってみましょう。

<h1 class="mainvisual_text"><style>
@keyframes rotation{
  0%{ transform:rotate(0);}
  100%{ transform:rotate(360deg); }
}
</style><div class="container-404" style="
    font-size: 100px;
    font-weight: bold;
    
"><span style="
    animation: 3s linear infinite rotation;
    display: inline-block;
">4</span>
<span style="
    animation: 3s linear infinite rotation;
    display: inline-block;
">0</span>
<span style="
    animation: 3s linear infinite rotation;
    display: inline-block;
">4</span></div><p>ページは存在しません</p>
</h1>

cssでアニメーションするには、animation プロパティと @keyforames なるものを利用します。

https://developer.mozilla.org/ja/docs/Web/CSS/@keyframes

結果がこちらです。

![Something went wrong]()

は？？？？

https://qiita.com/kunrenyouAcount/items/9a8e535beea1f55bee73

Qiita投稿画面で画像をアップロードしたときに「Something went wrong」と表示されてアップロードできない

な・・・・なんだってーーーーーーーーー！！！！！！

というわけでZennに来ました。 初Zennです。

続けます。

改めて、結果がこちらです。

ふぁんきーになりました。いいですね！

でも、これではまだまだ Be Crazy に届いていない気がしますね。もっとがんばります。

ちゅら太郎の召喚を召喚する

真ん中の０をちゅら太郎に置き換えたらどうでしょうか？なんか 可愛くなりそう ですよね。

ただ、ぼくはちゅら太郎の素材を手元に持っていません。うーん。どうしましょう。

Developer toolsでみてみると、なんとちゅらデータHPのロゴはSVGでできているじゃないですか。そのままコピペできそうですね。

https://ja.wikipedia.org/wiki/Scalable_Vector_Graphics

さっそくためしてみましょう。

！？？？

コピペの仕方を間違えて、文字列をいれてしまいました。まるで 初代ポケモンの技「なみのり」みたいなエフェクト（？） になりました。

びっくりしましたが、適切にコピペしてみます。

うん、良さそうですね！　調整は必要ですが、SVGを0から置き換えてぐるぐる回すことができました。

<h1 class=“mainvisual_text”><style>
@keyframes rotation{
  0%{ transform:rotate(0);}
  100%{ transform:rotate(360deg); }
}
</style><div class=“container-404" style=”
    font-size: 100px;
    font-weight: bold;
    
“><span style=”
    animation: 3s linear infinite rotation;
    display: inline-block;
“>4</span>
<span style=”
    animation: 3s linear infinite rotation;
    display: inline-block;
“>&lt;svg role=“img” aria-label=“ちゅらデータ” xmlns=“http://www.w3.org/2000/svg” width=“213.257" height=“36.774” viewBox=“0 0 213.257 36.774"&gt;
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<span style=”
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    display: inline-block;
“>4</span></div><p>ページは存在しません</p>
</h1>

だんぱち（沖縄の方言で散髪）

さて、もともとの予定はちゅら太郎だけがほしいので、ちゅらデータの文字はいりません。しかし、どうやってトリミングのようなことをすればよいでしょうか。

簡単です。SVGは中身はテキストなので、文字にあたるアウトラインを削除すればおｋです。

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<span style="
    animation: 3s linear infinite rotation;
    display: inline-block;
">4</span></div><p>ページは存在しません</p>
</h1>

ちょっとSVGのテキスト量が減ったのがわかりますでしょうか（わからないよね、わかる。わかるよ）

さて、テキスト量を減らしただけでは見栄えがアレです。下記画像をみてください。

月のような衛星みたいな 動きをしているので、中心に寄せられないか考えてみます。

また、SVGの話に戻りますが、SVGはviewBoxという属性があります。

https://www.indetail.co.jp/blog/13002/

詳しい話は↑の記事を確認してほしいのですが、要は描画されるエリアと画像の拡大・縮小などがコントロールすることができます。

今回はそれを使って反映してみました。するとどうなるでしょうか。

Perfect!!!

良いですね。これすべてCSSとHTMLでやっているのでとても良い時代になったなと感じます。

さぁ、これで Be Crazy になれたでしょうか。いいえ、まだまです。うちの社長と比べたらまだまだこんなものではありません。

RAINBOW

輝かせたいですよね？

色味が白なので味気がない気がします。

さて、ここから回転させるときに使ったようなanimationを再度使っていきます。

<h1 class="mainvisual_text"><style>
@keyframes rotation{
  0%{ transform:rotate(0);}
  100%{ transform:rotate(360deg); }
}

@keyframes rainbow_animation {
    0%,100% {
        background-position: 0 0;
    }

    50% {
        background-position: 100% 0;
    }
}</style><div class="container-404" style="
    font-size: 100px;
    font-weight: bold;
"><span style="
    animation: 3s linear infinite rotation, rainbow_animation 6s ease-in-out infinite;
    display: inline-block;
    background: linear-gradient(to right, #6666ff, #0099ff , #00ff00, #ff3399, #6666ff);
    color: transparent;
    -webkit-background-clip: text;
    background-size: 400% 100%;
">4</span>
<span style="
    display: inline-block;
    width: 200px;
    height: 135px;
    animation: 3s linear infinite rotation;
"><svg role="img" id="img-404" aria-label="ちゅらデータ" xmlns="http://www.w3.org/2000/svg" width="" height="" viewBox="-2 0 50 36.774" style="
    fill: #fff;
    position: absolute;
    width: 200px;
    height: 200px;
    display: block;
    top: 0;
    bottom: 0;
    margin: auto;
    left: 0;
    right: 0;
">
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<span style="
    animation: 3s linear infinite rotation;
    display: inline-block;
    animation: 3s linear infinite rotation, rainbow_animation 6s ease-in-out infinite;
    display: inline-block;
    background: linear-gradient(to right, #6666ff, #0099ff , #00ff00, #ff3399, #6666ff);
    color: transparent;
    -webkit-background-clip: text;
    background-size: 400% 100%;
">4</span></div><p style="
    animation: rainbow_animation 6s ease-in-out infinite;
    display: inline-block;
    background: linear-gradient(to right, #6666ff, #0099ff , #00ff00, #ff3399, #6666ff);
    color: transparent;
    -webkit-background-clip: text;
    background-size: 400% 100%;
    font-weight: bold;
">ページは存在しません</p>
</h1>

複数 animation を行うにはどうすればよいの？ No problem.

animation: 3s linear infinite rotation, rainbow_animation 6s ease-in-out infinite;

こんな感じで、 , で区切ることで複数 animation を表現することができます。

さて、結果はどうなったでしょうか。

とてもよくなりましたね！

欲を言えばちゅら太郎も輝かせたかったのですが、SVGがド素人のぼくにはうまく扱えませんでした。教えてすごい人。

ここまできたら、 後光 を指したくなりました。

ガンダムになりたい

あるアナザーガンダムでは、ガンダムを神と崇める人がいるように、ちゅら太郎も眩しくしたいと思います。

box-shadow というプロパティがあります。こいつをつかっていきましょう。

https://developer.mozilla.org/ja/docs/Web/CSS/box-shadow

<h1 class="mainvisual_text" style="
    animation: 10s linear infinite rainbow_animation_shadow;
    border-radius: 50%;
    box-shadow: 0px 0px 30px 30px #fffac0;
"><style>
@keyframes rotation{
  0%{ transform:rotate(0);}
  100%{ transform:rotate(360deg); }
}

@keyframes rainbow_animation {
    0%,100% {
        background-position: 0 0;
    }

    50% {
        background-position: 100% 0;
    }
}</style><div class="container-404" style="
    font-size: 100px;
    font-weight: bold;
"><span style="
    animation: 3s linear infinite rotation, rainbow_animation 6s ease-in-out infinite;
    display: inline-block;
    background: linear-gradient(to right, #6666ff, #0099ff , #00ff00, #ff3399, #6666ff);
    color: transparent;
    -webkit-background-clip: text;
    background-size: 400% 100%;
">4</span>
<span style="
    display: inline-block;
    width: 200px;
    height: 135px;
    animation: 3s linear infinite rotation;
"><svg role="img" id="img-404" aria-label="ちゅらデータ" xmlns="http://www.w3.org/2000/svg" width="" height="" viewBox="-2 0 50 36.774" style="
    fill: #fff;
    position: absolute;
    width: 200px;
    height: 200px;
    display: block;
    top: 0;
    bottom: 0;
    margin: auto;
    left: 0;
    right: 0;
">
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<span style="
    animation: 3s linear infinite rotation;
    display: inline-block;
    animation: 3s linear infinite rotation, rainbow_animation 6s ease-in-out infinite;
    display: inline-block;
    background: linear-gradient(to right, #6666ff, #0099ff , #00ff00, #ff3399, #6666ff);
    color: transparent;
    -webkit-background-clip: text;
    background-size: 400% 100%;
">4</span></div><p style="
    animation: rainbow_animation 6s ease-in-out infinite;
    display: inline-block;
    background: linear-gradient(to right, #6666ff, #0099ff , #00ff00, #ff3399, #6666ff);
    color: transparent;
    -webkit-background-clip: text;
    background-size: 400% 100%;
    font-weight: bold;
">ページは存在しません</p>
</h1>

できましたら、さて結果は。。。

ガン・・・ダム・・・・!

いい感じになりましたね。

animationを加える

ここまできたら、おわかりの通り、 box-shadow も animation にしちゃいましょう。

<h1 class="mainvisual_text" style="
    animation: 10s linear infinite rainbow_animation_shadow;
    border-radius: 50%;
"><style>
@keyframes rotation{
  0%{ transform:rotate(0);}
  100%{ transform:rotate(360deg); }
}

@keyframes rainbow_animation {
    0%,100% {
        background-position: 0 0;
    }

    50% {
        background-position: 100% 0;
    }
}

@keyframes rainbow_animation_shadow {
    0%,100% {
        box-shadow: 0px 0px 5px 1000px #fff575;
    }

    25% {
        box-shadow: 0px 0px 42px #fff;
    }

    75% {
        box-shadow: 0px 0px 42px 500px #f00;
    }
}</style><div class="container-404" style="
    font-size: 100px;
    font-weight: bold;
"><span style="
    animation: 3s linear infinite rotation, rainbow_animation 6s ease-in-out infinite;
    display: inline-block;
    background: linear-gradient(to right, #6666ff, #0099ff , #00ff00, #ff3399, #6666ff);
    color: transparent;
    -webkit-background-clip: text;
    background-size: 400% 100%;
">4</span>
<span style="
    display: inline-block;
    width: 200px;
    height: 135px;
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<span style="
    animation: 3s linear infinite rotation;
    display: inline-block;
    animation: 3s linear infinite rotation, rainbow_animation 6s ease-in-out infinite;
    display: inline-block;
    background: linear-gradient(to right, #6666ff, #0099ff , #00ff00, #ff3399, #6666ff);
    color: transparent;
    -webkit-background-clip: text;
    background-size: 400% 100%;
">4</span></div><p style="
    animation: rainbow_animation 6s ease-in-out infinite;
    display: inline-block;
    background: linear-gradient(to right, #6666ff, #0099ff , #00ff00, #ff3399, #6666ff);
    color: transparent;
    -webkit-background-clip: text;
    background-size: 400% 100%;
    font-weight: bold;
">ページは存在しません</p>
</h1>

よさそうです！さて実行すｒ・・・・あっ

box-shadow: 0px 0px 5px 1000px #fff575;

やべ 100pxで指定しようと思ったのに、 1000px はでか、アッ

・・・・まぁいいかな

UXを加える

このままだと、トップページに戻れないので、 UX を足します。

これでおｋです。

以上です。

どうでしょうか。 Be Crazy に近づけたんじゃないでしょうか。本日HP定例会があるので、プレゼンしてこうと思います。

では、また来年〜。さようなら〜〜〜。

後日談(2021/12/20)

（ボス）ええんじゃない。とりあえず404ページ、こちらでデプロイしてどうぞ
（aipa）ワロタ

まじか（まじか）

というわけで実装しました。本当にありがとうございました。

https://churadata.okinawa/404

くぅ〜〜〜疲れま(ry