anograms.js

const arr = ["art","tra","filo","olif",'bilal', "labil", "hi", "ho"];
let el = [];
const newArr = [];

const obj ={}
let te
let result = [];


const fn = (arr)=>{

      for(let i = 0 ; i < arr.length ; i++){          
         el = arr[i].split("").sort().join("");
        obj[arr[i]] = el                  
      }
   
      

       let  objValues1 = Object.values(obj); 
       const tempObj = {}
       objValues1.forEach(el =>{
         tempObj[el] = true;
       })
      
  
       const objKeys = Object.keys(obj);

       let objValues2 = Object.keys(tempObj);
              
       for (let i = 0; i < objValues2.length ; i ++){

                 let currentValue = objValues2[i]
                 
                let count  = 0;

                objValues1.forEach(e=>{
                    if ( e === currentValue) {
                       count ++;  
                    }  
                });
                          
                         for(let key in obj ){
                               
                             if(obj[key]  === currentValue  && count > 1  ){
                                 
                          
                           result.push(`${ key }---${currentValue}`);
                           
                      }
                         }
                 
                         
                 
                  
  
                     
          


        }
                                        

     
        
  return   result 

}

fn(arr)