export type HtmlEscaped = { isEscaped: true } export type HtmlEscapedString = string & HtmlEscaped export type StringBuffer = [string] // The `escapeToBuffer` implementation is based on code from the MIT licensed `react-dom` package. // https://github.com/facebook/react/blob/main/packages/react-dom/src/server/escapeTextForBrowser.js const escapeRe = /[&<>'"]/ export const escapeToBuffer = (str: string, buffer: StringBuffer): void => { const match = str.search(escapeRe) if (match === -1) { buffer[0] += str return } let escape let index let lastIndex = 0 for (index = match; index < str.length; index++) { switch (str.charCodeAt(index)) { case 34: // " escape = '"' break case 39: // ' escape = ''' break case 38: // & escape = '&' break case 60: // < escape = '<' break case 62: // > escape = '>' break default: continue } buffer[0] += str.substring(lastIndex, index) + escape lastIndex = index + 1 } buffer[0] += str.substring(lastIndex, index) }