JavaScript Array undefined element

This question already has an answer here:

How can I add new array elements at the beginning of an array in JavaScript? 6 answers

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this.arraylist is wrong this represent a current object you are not currently using any class in above code you just need to change 

  function putToFirst(e){
   var array = [];
   var arrayList=[];
   array.push(e);
  arrayList = array.concat(arrayList);
  console.log(arrayList);
}

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