How to use the mathjax-full/js/input/tex/TexParser function in mathjax-full

splitMath = _.memoize((math: string) => {
        let parser = new TexParser(
            math,
            { display: true, isInner: false },
            this.parseOptions
        );

        parser.i = 0;   //  reset parser
        const response = [];
        while (parser.i < parser.string.length) {
            response.push(parser.GetArgument(math, true))
        }
        /*
         * try to compose bbox
        const mathItems = _.map(response, (frag, index, collection) => {
            const bip = new HTMLMathItem(frag, this.tex, true);
            bip.compile(this.html.document)
            bip.bbox = this.svg.getBBox(bip, this.html);