What is grunt complaining about?

Question

JavaScript

Good afternoon! The project is not going, gives an error. Says, they say, a syntax error

Here is a piece of code, at the beginning of which, apparently, there is an error:

function extractNodeLevel(level, twoLevels = true){
    if(layouts[0]){
      if(!layouts[0][level]){
        return null;
      }
    } else {
      return null;
    }
    var nodes1 = [];
    if(layouts[0][parseInt(parseInt(level) + 1)] && twoLevels){
      var nodes2 = [];
      for(var layout in layouts){
        nodes1.push(layouts[layout][parseInt(level)]);
        nodes2.push(layouts[layout][parseInt(parseInt(level) + 1)]);
      }
      return {nodes1:nodes1, nodes2:nodes2};
    } else {
      for(var layout in layouts){
        nodes1.push(layouts[layout][parseInt(level)]);
      }
      return {nodes1:nodes1};
    }	
    
  }

Answer 1

your uglyfire about ES6 is not up to date