var myVariable = 10;

if (thisProperty.propertyIsEnumerable("ADBE Effect Parade")) {
  // 属性存在
} else {
  // 属性不存在
}

var myVariable = 10;
myVariable = myVariable + 1; // 正确
myVaraible = myVariable + 1; // 错误

try {
  var result = undefinedVariable + 1;
} catch (e) {
  console.log("Error: " + e.message);
}

// 声明变量
var myVariable = 10;

// 检查属性存在性
if (thisProperty.propertyIsEnumerable("ADBE Effect Parade")) {
  var effectValue = thisProperty.valueAtTime(time, false);
  console.log(effectValue);
} else {
  console.log("Effect Parade does not exist.");
}

// 使用 try-catch 块
try {
  var result = myVariable + 1;
  console.log(result);
} catch (e) {
  console.log("Error: " + e.message);
}