javascript - How to read property target using Input type range -


i'm trying implement input range slider on component in react.

however, when try use slider, error whenever move slider , site breaks, "uncaught typeerror: cannot read property 'target' of undefined".

here i've tried far, ideas of i'm going wrong? thanks!

import react, {component} 'react'; import grid 'material-ui/grid'; import loader './loader';  class leader extends component {     constructor(props){         super(props);         this.state = {             isloading: true,             value: 3         };     }  componentdidmount(){     //delays rendering css loader, appear 1 second , let component load after     settimeout(() => this.setstate({isloading: false}), 1000); }  handlesliderchange(event){     this.setstate({value: this.event.target.value}); }  render(){      if(loading){         return <loader />     }else{         return(             <grid container gutter={24}>                                  <grid item xs={12}>                      <div classname="questiondesc questionfadein sectionseperator">                         how money want?                     </div>                      <div>                         <input                         type="range"                         min="0"                         max="5"                         value={this.state.value}                         onchange={this.handlesliderchange.bind(this)}                         step="1" />                     </div>                 </grid>             </grid>         )     } } }  export default leader; 

handlesliderchange(event){     this.setstate({value: this.event.target.value}); }

replace 

handlesliderchange(event){     this.setstate({value: event.target.value}); }

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