Language: TypeScript
Label: safe
CWE: CWE-79 \u2014 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Code:
function TuleapHighlightFilter() {
    function getHTMLStringFromTemplate(template) {
        const element = document.createElement("div");
        template({}, element);

        return element.innerHTML;
    }

    return function (text, search) {
        if (text === null) {
            return null;
        }
        return getHTMLStringFromTemplate(highlightFilterElements(text, search));
    };
}