How to user the numric and string variable in jscode in streamlit app

dear sir

see my code and give me idea how to i use the numrinc and string variable in jscode in streamlit application thank you in advance for your help

‘‘‘

yy = 70

#if (params.value < 70) {

score_cellstyle_jscode = JsCode(“”"

        function(params) {

            if (params.value < &yy&) {

                return {

                    'color': 'white',

                    'backgroundColor': 'red'

                }

            } else if (params.value >= 90) {

                return {

                    'color': 'white',

                    'backgroundColor': 'green'

                }

            }

            return null; // Default styling

        }

    """)

‘‘‘

How to utilize the yy variable in the aforementioned code, whether numeric or string? Please provide guidance for both.