runewidth provides functions to get fixed width of the character or string.

This is a fork of https://github.com/mattn/go-runewidth, updated to the newest Unicode. It also removes various helper functions, so all that remains is just the runewidth.RuneWidth() function:

runewidth.RuneWidth('a')
runewidth.RuneWidth('つ')
runewidth.RuneWidth('🤷')

Note this can NOT be used to get the width of the string:

// Broken! Do not do this.
l := 0
for _, r := range str {
    l += runewidth.RuneWidth(r)
}

Use https://github.com/arp242/termtext or https://github.com/rivo/uniseg for getting the width of a string.

This is mostly useful in conjunction with the uniseg package, as used in termtext.