react-router-dom v5@^4.0.0跳转

import {withRouter} from 'react-router-dom' search(){ this.props.history.push("/?tag=query&txt="+this.state.txt) }
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import {withRouter} from 'react-router-dom' search(){ this.props.history.push("/?tag=query&txt="+this.state.txt) }