Javascript explode() equivalent

explodeJS.js

 console.log('searchVal split = ' + searchVal.split(' '));
      var searchValArray = searchVal.split(' ');//.slice(1,-1);
      
      console.log("SEARCH Array: " + searchValArray + "......");

      var searchString = "";
     
    for(var i in searchValArray){
      searchString += String(searchValArray[i] + "+");
    }