How to get current name of route(such as 'this' value)in Vuejs?

I am a newbie of vueJS and I would like to use the following template to start my project and I would like to convert it work with IE11

Link : codepen erickarbe/pen/pLbRqQ

The original code is:

computed: {

filteredMembers() {
  return this.members.filter(member => {
    
    let first = member.First.toLowerCase()
    let last = member.Last.toLowerCase()
    
    let fresult = first.includes(this.searchQuery.toLowerCase()) 
    let lresult = last.includes(this.searchQuery.toLowerCase()) 
     
    if(fresult)
      return fresult
    
    if(lresult)
      return lresult
  })
}, 

In order to work with IE11 and I try to use polyfill and convert the code to

computed: {
filteredMembers: function(){  
  return this.members.filter(function(member){
    
    let first = member.First.toLowerCase()
    let last = member.Last.toLowerCase()

   //Error for 'this' 
    let fresult = first.includes(this.searchQuery.toLowerCase())  //'this' Error 
    let lresult = last.includes(this.searchQuery.toLowerCase())  //'this' Error 
   //Error for 'this'

    if(fresult)
      return fresult
    
    if(lresult)
      return lresult
  })
},}

I have Error When I using 'this' on this.searchQuery.toLowerCase())

but I can solve it using 'var ths = this' like

 computed: {
    filteredMembers: function(){
      var ths = this;  
        ........
      let fresult = first.includes(ths.searchQuery.toLowerCase())
      let lresult = last.includes(ths.searchQuery.toLowerCase())

Is it very hardecode or stupid way to get 'this' value???

Is there any best way to get current 'this' value,Thank you very much

Please read about how the this keyword works in JavaScript.

You just need to bind the original this to the new function:

return this.members.filter((function (member) {
  // ...
}).bind(this))

The extra () around the function may not be necessary, but I wasn't sure if IE11 would work without it.