         fontSize: "18px",
                mode: "text/x-java"
            };
            var cmConfigSafe = {
                lineNumbers: true,
                lineWrapping: false,
                indentUnit: 4,
                indentWithTabs: true,
                theme: 'juejinsafe',
                styleActiveLine: {nonEmpty: true},
                fontSize: "18px",
                mode: "text/x-java"
            };


            CodeMirror(document.getElementById("dirTraversal"), Object.assign({}, cmC