The code is from this post. It makes the params more clear.
function renderList(list, {
ordered = true,
color = '#1e2a2d',
bgColor = 'transparent'
} = {}) {
/* ... */
}
// simple use
renderList(['love', 'patience', 'pain'])
// with all arguments
renderList(['one', 'two'], { ordered: true, color: '#c0ffee', bgColor: '#5ad' })
// with only one optional argument (bgColor)
renderList(['one', 'two'], { bgColor: '#5ad' })
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