Routing parameters cannot be obtained in react

routing: < Route path= "/ datareport/:name" component= {ReportIndex} > < / Route > ;
receive: `componentWillMount () {

   document.title=""+this.props.params.name;
}`

access: Why does http://localhost:3000/datareport/3
make an error saying there is no name attribute

Mar.02,2021

check whether it is executed in ReportIndex,

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b2b03a-2ba70.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b2b03a-2ba70.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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