TypeError: Cannot read properties of undefined (reading 'filter')

这个错误是由于尝试在undefined对象上读取"filter"属性造成的。具体来说，错误发生在这行代码上：typeof(_this.Type_Ary.filter((data) => data.CODE == row.DEP_TYPE)) =="undefined"。当"_this.Type_Ary"是undefined时，在它上面调用"filter"方法就会导致这个错误。为了修复这个错误，可以在方法中添加一个判断条件来检查"_this.Type_Ary"是否存在并且不是undefined，只有在这种情况下才执行"filter"方法的调用。下面是修复后的代码示例：const formatter_DepType = function (row, column) { if (_this.Type_Ary && row.DEP_TYPE) { if(typeof(_this.Type_Ary.filter((data) => data.CODE == row.DEP_TYPE)) =="undefined"){ return ""; } return _this.Type_Ary.filter((data) => data.CODE == row.DEP_TYPE).NAME; } return ""; }<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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