The el-table formatter attribute in the element UI displays a fixed number of words and exceeds the ellipsis

<el-table-column prop="title" label="标题" :formatter="stateFormat"></el-table-column>

// 格式化表格内容
stateFormat(row, column, cellValue) {
  if (!cellValue) return "";
  if (cellValue.length > 20) {
    // 最多显示20个字符
    return cellValue.slice(0, 20) + "...";
  }
  return cellValue;
},