如何在浏览器端使用dayjs的插件功能？

Question

dayjs的dayOfYear需要使用插件；如何让 firefox正确dayjs('2010-01-15').dayOfYear()？

vim day.html:

<script src="https://unpkg.com/dayjs@1.8.21/dayjs.min.js"></script>
<script>
    var weekday = require('dayjs/plugin/weekday')
    dayjs.extend(weekday)
    alert(dayjs('2010-01-15').dayOfYear());
</script>

用firefox打开，得不到结果？

Answer 1

正确的解答

<script src="https://unpkg.com/dayjs@1.8.21/dayjs.min.js"></script>
<script src="https://unpkg.com/dayjs@1.8.21/plugin/dayOfYear.js"></script>
<script>dayjs.extend(window.dayjs_plugin_dayOfYear)</script>
<script>
    alert(dayjs('2010-01-15').dayOfYear());
</script>

Answer 2

<script src="https://unpkg.com/dayjs@1.8.21/dayjs.min.js"></script>
<script src="https://unpkg.com/dayjs@1.8.21/plugin/weekday.js"></script>
<script>
    window.dayjs.extend(window.dayjs_plugin_weekday)
    alert(window.dayjs('2010-01-15').dayOfYear());
</script>