How to import/require 'obj', 'mtl' extensions files?

Im using vue / webpack with import/require relative url in OBJLoader, but it didnt work.

let obj_loader = new OBJLoader();
      obj_loader.load(
        require('@/assets/blender/objfile.obj'),
        function ( object ) {

          scene.add( object );

        },
        // called when loading is in progresses
        function ( xhr ) {

          console.log( ( xhr.loaded / xhr.total * 100 ) + '% loaded' );

        },
        // called when loading has errors
        function ( error ) {

          console.log( 'An error happened' );

        }
      );