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Bootstrap4のポップオーバーで画像のスタイルが効かなくてハマった件

Last updated at 2020-05-05Posted at 2020-05-05

環境

Bootstrap : 4.4.1

問題のソース

script-popover.html

<!DOCTYPE html>
<html lang="ja">

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"
          integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
    <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js"
            integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n"
            crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"
            integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo"
            crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"
            integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6"
            crossorigin="anonymous"></script>
    <title>ExampleTitle</title>
</head>

<body>
<div class="container">
    <div class="row m-2">
        <div class="col-12">
            <button type="button" class="btn btn-secondary">popover button</button>
        </div>
    </div>
</div>
</body>

<script>
    $(function () {
        (function () {
            let img = '<img src="../img/sample.jpg" alt="sample" style="width:75px;">';
            let title = '<div>This is popover!</div>';
            $('button').popover({
                'placement': 'top',
                'container': 'body',
                'trigger': 'focus',
                'title': title,
                'html': true,
                'content': img,
            });

        })();

    });
</script>

実行イメージ

スタイルに75pxを指定しているのに効いてない

解決策

StirngじゃなくてJQueryでDOMオブジェクトに変換してやればうまくいく

script-popover.html

～～～省略～～～
'content': $($.parseHTML(img)),

うまくいった

リファレンス

https://cccabinet.jpn.org/bootstrap4/components/popovers

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