Function fetchSource

core/src/core.js:131–148

(tag, io, asText)

     * content as source.
     */
    const fetchSource = async (tag, io, asText) => {
        if (tag.hasAttribute("src")) {
            try {
                return await fetch(tag.getAttribute("src")).then(getText);
            } catch (error) {
                io.stderr(error);
            }
        }

        if (asText) return dedent(tag.textContent);

        const code = dedent(unescape(tag.innerHTML));
        console.warn(
            `Deprecated: use <script type="${TYPE}"> for an always safe content parsing:\n`,
            code,
        );
        return code;
    };

    // register once any interpreter
    let alreadyRegistered = false;