angular - 错误类型错误 : Cannot read property 'replace' of null

Question

尽管我的应用程序运行正常，但我遇到了类型错误。

"ERROR TypeError: Cannot read property 'replace' of null"

如何解决这个问题？

if (isInitial) {

                  // Add Data Rows (initially)
                  for(const row of rows) {

                    const clientVisitGuid = row[2];
                    const location = row[3];

                    row[5] = row[5].replace(/\//g, '\/\u200B');
                    const service = row[5];

                    const rowId = `${service || 'zzz'}_${location}_${clientVisitGuid}`;
                    const sortString = `${service || 'zzz'}_${location}_${clientVisitGuid}`;
                    const daysPastDischarge = parseInt(row[6]);
                    const isMarked = parseInt(row[7]) === 1 ? true : false;

                    if (cbt.hasBodyRow(rowId) === false) {

                      const values: Array<[string, string | number]> = [];
                      let isAllClear = true;
                      for(let i = 0; i < row.length; i++) {
                        const colId: string = cbt.headerRow.headerCols[i].id;
                        const colVal: string | number = row[i];
                        if (cbt.headerRow.headerCols[i].isFlag === true && colVal !== 1) {
                          isAllClear = false;
                        }
                        values.push([colId, colVal]);
                      }

                      const valueHash = hash(JSON.stringify(row));

                      cbt.addBodyRow(
                        rowId,
                        values,
                        valueHash,
                        sortString,
                        daysPastDischarge,
                        isMarked,
                        isAllClear,
                        true,
                      );
                    }
                  }

Answer 1

要修复错误，您需要在尝试替换字符串之前检查变量是否存在。用这样的 if 语句包装它:

if(row[5]) {
    row[5] = row[5].replace(/\//g, '\/\u200B');
    const service = row[5];
}