ucs2length.ts
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ucs2length.ts
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			// https://mathiasbynens.be/notes/javascript-encoding
			// https://github.com/bestiejs/punycode.js - punycode.ucs2.decode
			export default function ucs2length(str: string): number {
			const len = str.length
			let length = 0
			let pos = 0
			let value: number
			while (pos < len) {
			length++
			value = str.charCodeAt(pos++)
			if (value >= 0xd800 && value <= 0xdbff && pos < len) {
			// high surrogate, and there is a next character
			value = str.charCodeAt(pos)
			if ((value & 0xfc00) === 0xdc00) pos++ // low surrogate
			}
			}
			return length
			}

			ucs2length.code = 'require("ajv/dist/runtime/ucs2length").default'