Cannot read property 'map' of undefined问题及解决方法
报错如下： 这个问题出在rows.map上，那么可以推测是调用map的对象undefined，不是map自己undefined，顺着rows可以看到很有可能是this.state.selectedRows出问题了，紧接着找到此处代码如下： 会发现this.state压根没有selectedRows，所以在this.state对象里面加上selectedRows，即可。
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相关文章
- 1. Q： Cannot read property 'Map' of undefined ?
- 2. js问题 Cannot read property 'messages' of undefined
- 3. Webpack TypeError: Cannot read property 'make' of undefined问题
- 4. （已解决）TypeError: Cannot read property '_t' of undefined
- 5. 完美解决 Cannot read property 'length' of undefined
- 6. Cannot read property '_withTask' of undefined
- 7. TypeError: Cannot read property 'compilation' of undefined
- 8. "TypeError: Cannot read property ‘_wrapper’ of undefined"
- 9. TypeError: Cannot read property 'key' of undefined
- 10. TypeError Cannot read property ‘nativeElement’ of undefined