How to make child table field read only as per child table field condition whenever load

[Mohammadali]

Hi @Talib_Sheikh
Please try this code. I hope it will help you.

frappe.ui.form.on('Test Child', {
    status: function(frm, cdt, cdn) {
        let child_doc = locals[cdt][cdn];
        if (child_doc.status == "Pending") {
            frm.fields_dict['child_name'].grid.grid_rows_by_docname[cdn].toggle_editable('field_name', false);
        } else {
            frm.fields_dict['child_name'].grid.grid_rows_by_docname[cdn].toggle_editable('field_name', true);
        }
    }
});

Thank You!