42 lines
937 B
TypeScript
42 lines
937 B
TypeScript
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export const Fragment = "FRAGMENT";
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export type Tag = {
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name: string;
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attrs?: Record<string, string | undefined>;
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body: Tag[] | string;
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} | string;
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function htmlEscape(s: string): string {
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return s.replace(/&/g, "&")
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.replace(/</g, "<")
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.replace(/>/g, ">")
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.replace(/"/g, """);
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}
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export function renderHtml(t: Tag | null): string {
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if (!t) {
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return "";
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}
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if (typeof t === "string") {
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return htmlEscape(t);
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}
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const attrs = t.attrs
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? " " + Object.entries(t.attrs)
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.filter(([, value]) => value !== undefined)
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.map(([k, v]) => `${k}="${htmlEscape(v!)}"`).join(
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" ",
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)
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: "";
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const body = typeof t.body === "string"
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? htmlEscape(t.body)
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: t.body.map(renderHtml).join("");
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if (t.name === Fragment) {
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return body;
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}
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if (t.body) {
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return `<${t.name}${attrs}>${body}</${t.name}>`;
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} else {
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return `<${t.name}${attrs}/>`;
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}
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}
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