javascript - how to fix object "undefined" -


please tell me how fix, answer comes "object undefined".

var dog = { name : "fido", weight : 20.2, age : 4, breed : "mixed", activity : "fetch balls" }; var bark; if (dog.weight > 20) { bark = "woof woof"; } else { bark = "woof woof"; }  var speak = dog.name + " says " + dog.bark + " when wants " +     dog.activity; console.log(speak);

instead of setting bark = "...", if want set property of dog object, set as:

dog.bark = "woof woof"; 

var dog = {    name: "fido",    weight: 20.2,    age: 4,    breed: "mixed",    activity: "fetch balls"  };    if (dog.weight > 20) {    dog.bark = "woof woof";  } else {    dog.bark = "woof woof";  }    var speak = dog.name + " says " + dog.bark + " when wants " + dog.activity;  console.log(speak);


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