docs: add JS docs

src/editors/data/services/cms/utils.js

@@ -23,6 +23,16 @@ export const deleteObject = (...args) => getAuthenticatedHttpClient().delete(...
 
 export const client = getAuthenticatedHttpClient;
 
+/**
+ * Replaces all relative image URLs in the given text with absolute URLs.
+ *
+ * This function searches for relative URLs in `src` attributes of image tags within the provided text,
+ * and replaces them with absolute URLs by prefixing them with the specified LMS endpoint URL.
+ *
+ * @param {string} text - The input text containing image tags with relative URLs.
+ * @param {string} lmsEndpointUrl - The base URL to prepend to each relative URL to form an absolute URL.
+ * @returns {string} The text with all relative image URLs replaced by absolute URLs.
+ */
 export const replaceRelativeImageUrlsByAbsolute = (text, lmsEndpointUrl) => {
   const relativeSrcRegExp = /(?<=src=")(\/.*?)(?=")/g;
   const replaceRelativeToAbsoluteUrl = (relativeUrl) => `${lmsEndpointUrl}${relativeUrl}`;