请问如何修改提示框的宽度，字太多被遮住了

formatter里判断字数然后加换行
这是我之前写的有点low,你可以参考一下

this.option.series[0].label.normal.formatter = function formatter(v) {  
                  let text = v.name;  
                  let value_format = v.value + '%';  
                  if (text.length <= 6) {  
                    return `${text}\n${value_format}`;  
                  } else if (text.length > 6 && text.length <= 12) {  
                    return text = `${text.slice(0, 6)}\n${text.slice(6)}\n${value_format}`  
                  } else if (text.length > 12 && text.length <= 18) {  
                    return text = `${text.slice(0, 6)}\n${text.slice(6, 12)}\n${text.slice(12)}\n${value_format}`  
                  } else if (text.length > 18 && text.length <= 24) {  
                    return text = `${text.slice(0, 6)}\n${text.slice(6, 12)}\n${text.slice(12, 18)}\n${text.slice(18)}\n${value_format}`  
                  } else if (text.length > 24 && text.length <= 30) {  
                    return text = `${text.slice(0, 6)}\n${text.slice(6, 12)}\n${text.slice(12, 18)}\n${text.slice(18, 24)}\n${text.slice(24)}\n${value_format}`  
                  } else if (text.length > 30) {  
                    return text = `${text.slice(0, 6)}\n${text.slice(6, 12)}\n${text.slice(12, 18)}\n${text.slice(18, 24)}\n${text.slice(24, 30)}\n${text.slice(30)}\n${value_format}`  
                  }  
            }