基本用法 `<button>默認按鈕<button>` 不同顏色按鈕 ~~~ <button light>Light</button> <button>Primary</button> <button secondary>Secondary</button> <button danger>Danger</button> <button dark>Dark</button> ~~~ 不同顏色描邊按鈕 ~~~ <button light outline>Light Outline</button> <button outline>Primary Outline</button> <button secondary outline>Secondary Outline</button> <button danger outline>Danger Outline</button> <button dark outline>Dark Outline</button> ~~~