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HTML 

              
                <body>
    <!-- スタイルシートの読み込み -->
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bulma@0.9.2/css/bulma.min.css">
    <!-- スタイルシートの読み込み -->

    <!-- 「iost.min.js」の読み込み -->
    <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/iost@0.1.22/dist/iost.min.js"></script>
    <!-- 「iost.min.js」の読み込み -->

    <section class="section">
        <div class="container">

            <div id="log"></div>
            <div id="suc"></div>

            <div class="notification is-info">
                Chrome拡張機能ウォレット「iWallet」が<strong>インストール済みで</strong>ウォレットの<strong>ロックが解除</strong>されていれば、ウォレットにインポートしているアカウント情報が表示されます。
            </div>


            <div class="card">
                <div class="card-content">

                    <span class="tag is-black" id="login">利用できるアカウントはありません</span>
                    <div class="field">
                        <label class="label">送金先アカウントID</label>
                        <div class="control">
                            <input class="input" type="text" id="account_to" placeholder="送付先IDを入力">
                        </div>
                    </div>

                    <div class="field">
                        <label class="label">送金量</label>
                        <div class="control">
                            <input class="input" type="text" id="amount" placeholder="送金量">
                        </div>
                    </div>

                    <div class="field">
                        <label class="label">メモの内容</label>
                        <div class="control">
                            <input class="input" type="text" id="memo" placeholder="メモの値を入力">
                        </div>
                    </div>

                    <button class="button is-primary" onclick="transfer()">送金の実行</button>
                    <p class="help is-danger">※サンプルのため、バリデーションチェックは入れておりません。送金量に数字半角以外を入れるとiWalletが起動しません。</p>

                </div>
                <!-- フッター -->
                <footer class="card-footer">
                    <p class="card-footer-item">
                        <span>
                            <a href="https://developers.iost.io/docs/ja/1-getting-started/Overview.html" target="_blank"
                                rel="noopener noreferrer">IOST開発ドキュメント</a>
                        </span>
                    </p>
                    <p class="card-footer-item">
                        <span>
                            <a href="https://github.com/iost-official" target="_blank"
                                rel="noopener noreferrer">IOSTのGitHub</a>
                        </span>
                    </p>
                </footer>
                <!-- フッター -->

            </div>

        </div>

    </section>

</body>
!

CSS
!

JS 

              
                function log(msg, flg) {
    document.getElementById('suc').innerHTML = '';
    var p = document.createElement('p');
    p.innerHTML = msg;

    if ('suc' == flg) {
        document.getElementById('suc').appendChild(p);
        document.getElementById('suc').className = "notification is-success";
        return;
    }

    document.getElementById('log').innerHTML = '';
    document.getElementById('log').appendChild(p);
    document.getElementById('log').className = "notification is-danger";
}

var transfer;
var flg;

document.addEventListener(
    // 500ミリ秒＝0.5秒ごとにIOSTアカウント情報を取得するための時間設定
    "DOMContentLoaded", async function (event) {
        await new Promise(done => setTimeout(() => done(), 500));

        // ここでChrome拡張機能のウォレット（IOSTアカウント）情報を取得
        IWalletJS.enable().then(
            function (account_from) {
                // 【取得できない（空）】なら後の処理はしない
                if (!account_from) return;
                // 【取得できた】なら画面に表示
                document.getElementById('login').innerHTML = "現在使用されているIOSTアカウントは「" + account_from + "」です";

                // IOST送金のための処理を始めるための準備
                const iost = IWalletJS.newIOST(IOST);

                // ここから「送金の実行」が押された後の処理が始まります。
                transfer = function () {
                    // テキストフィールドの値取得
                    const account_to = document.getElementById("account_to").value;
                    const amount = document.getElementById("amount").value;
                    const memo = document.getElementById("memo").value;

                    // トランザクション（この場合は送金）内容の設定
                    const tx = iost.callABI("token.iost", "transfer", ["iost", account_from, account_to, amount, memo]);

                    // 送金内容の反映（Chrome拡張機能ウォレットが起動）
                    tx.addApprove("iost", amount);
                    console.log(tx.getApproveList());

                    // 送金処理実行後の分岐
                    iost.signAndSend(tx)
                        // 【送金が成功した場合】トランザクションIDが取得できます。
                        .on('pending', function (txid) {
                            flg = "pen";
                            log("トランザクションID: " + txid, flg);
                        })
                        // 【送金が成功した場合】トランザクションの内容（レシート）が取得できます。
                        .on('success', function (result) {
                            flg = "suc";
                            log("送金結果: " + JSON.stringify(result), flg);
                        })
                        // 【送金が失敗した場合】エラー文言を取得または表示できます。
                        .on('failed', function (failed) {
                            flg = "fai";
                            log("送金失敗:ユーザーが署名要求を拒否しました→原文「 " + JSON.stringify(failed) + "」", flg);
                        })
                }

            }
        )
    }
)
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