React - Material UI Autocomplete on words that aren't the first in a sentence

I am trying to implement autocomplete on hashtags for my webapp, so typing #h would bring up a menu with #hello, #hope, etc etc. As im using Material UI everywhere else it would be great if i could just use the autocomplete-component, but it only works on the first word typed in the AutoComplete-box. In other words, it can autocomplete "#Hello what a great day", but if i type more than one word the autocomplete is disabled, so "It sure is a great day #Hello" won't auto complete the #Hello. None of their examples can do this either. Does anyone have any pointers?

Here is how you can do it with the material-ui components:

<div style={{position:'relative'}}>

      <AutoComplete
        hintText="Type anything"
        dataSource={['#hello','#how','#are','#you']}
        ref={ref=>this.autocompleteRef=ref}
        searchText={this.state.searchText}
        onNewRequest={this.onNewRequest}
        textFieldStyle={{visibility:'hidden'}}
        style={{position:'absolute',top:'0',left:'0'}}
      />
      <TextField
        value={this.state.fullText || ''}
        hintText="fullText"
        onChange={this.myTextChange}
        type="text"
      />
    </div>

And the functions should look something like:

myTextChange=(event)=>{
  let fullText = event.target.value,searchText;
  let hashTaggingIndex = this.hashTaggingIndex;
  if(hashTaggingIndex && hashTaggingIndex>-1){
    if(fullText[fullText.length-1]===' ') this.hashTaggingIndex = -1;
    else {
      searchText = fullText.substring(hashTaggingIndex+1,fullText.length);
    }
  } else if(fullText[fullText.length-1]==='#') { 
     this.hashTaggingIndex=fullText.length-1;
  }
  this.setState({fullText,searchText});
  if(this.autocompleteRef && hashTaggingIndex && hashTaggingIndex>-1){
    this.autocompleteRef.handleChange(event);
   }
};

onNewRequest=(value)=>{
  let fullText=this.state.fullText;
  fullText = fullText.substring(0,this.hashTaggingIndex) + value;
  this.setState({fullText})
};

Have fun:)