astro
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Astro is a modern site builder with web best practices, performance, and DX front-of-mind.
29 lines (28 loc) • 778 B
JavaScript
const NEEDS_ESCAPE_RE = /[`\\]|\$\{/g;
function needsEscape(value) {
NEEDS_ESCAPE_RE.lastIndex = 0;
return typeof value === "string" && NEEDS_ESCAPE_RE.test(value);
}
function escapeTemplateLiteralCharacters(value) {
NEEDS_ESCAPE_RE.lastIndex = 0;
let char;
let startIndex = 0;
let segment = "";
let text = "";
while ([char] = NEEDS_ESCAPE_RE.exec(value) ?? []) {
if (!char) {
text += value.slice(startIndex);
break;
}
const endIndex = NEEDS_ESCAPE_RE.lastIndex - char.length;
const prefix = segment === "\\" ? "" : "\\";
segment = prefix + char;
text += value.slice(startIndex, endIndex) + segment;
startIndex = NEEDS_ESCAPE_RE.lastIndex;
}
return text;
}
export {
escapeTemplateLiteralCharacters,
needsEscape
};