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@thetallweeks

thetallweeks/escape-html.ts

Created November 5, 2014 17:14
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Little function for escaping html characters (in TypeScript)
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escape-html.ts
// From Tom Gruner @ http://stackoverflow.com/a/12034334/1660815
var entityMap = {
"&": "&",
"<": "&lt;",
">": "&gt;",
'"': '&quot;',
"'": '&#39;',
"/": '&#x2F;'
};
function escapeHtml(source: string) {
return String(source).replace(/[&<>"'\/]/g, s => entityMap[s]);
}
@lele-blue
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A null-check-resistant variant:

const entityMap = new Map<string, string>(Object.entries({
    "&": "&amp;",
    "<": "&lt;",
    ">": "&gt;",
    '"': '&quot;',
    "'": '&#39;',
    "/": '&#x2F;'
}))

export function escape_html(source: string) {
    return String(source).replace(/[&<>"'\/]/g, (s: string) => entityMap.get(s)!);
}

@magast
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magast commented Jan 3, 2022

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