Javascript 将字符串传递到正则表达式中

考虑以下几点：

 function filterFoods() {
   var foods = [
      {food: 'Bacon'}, {food: 'Butter'}, {food: 'Chicken'}, {food: 'Cocoa butter'},
      {food: 'Saussages'}, {food: 'Ham'}, {food: 'Duck'}, {food: 'Salmon'},
      {food: 'Fish'}, {food: 'Lamb'}, {food: 'Fries'}, {food: 'Tomatoes'},
      {food: 'Chicken'}, {food: 'Carrot'}, {food: 'Egg'}, {food: 'Avocado'},
      {food: 'Duck'}, {food: 'Hello'}, {food: 'Cheese'}, {food: 'Carrot'},
      {food: 'Potato'}, {food: 'Sweet Potato'}, {food: 'Pineapple'}, {food: 'Peanut'},
  ]
  return foods.filter(function(food) {
    return (/po/gi).test(food.food);
  });
}

console.log(
  filterFoods()
)

我回来了，这就是我想要的

但我希望能够将某些内容传递到filterFoods函数，然后传递到正则表达式中，有点像这样：

 function filterFoods(query) {
   var foods = [
      {food: 'Bacon'}, {food: 'Butter'}, {food: 'Chicken'}, {food: 'Cocoa butter'},
      {food: 'Saussages'}, {food: 'Ham'}, {food: 'Duck'}, {food: 'Salmon'},
      {food: 'Fish'}, {food: 'Lamb'}, {food: 'Fries'}, {food: 'Tomatoes'},
      {food: 'Chicken'}, {food: 'Carrot'}, {food: 'Egg'}, {food: 'Avocado'},
      {food: 'Duck'}, {food: 'Hello'}, {food: 'Cheese'}, {food: 'Carrot'},
      {food: 'Potato'}, {food: 'Sweet Potato'}, {food: 'Pineapple'}, {food: 'Peanut'},
  ]
  return foods.filter(function(food) {
    return (/query/gi).test(food.food);
  });
}

console.log(
filterFoods('po')
)

但我得到的是一个空数组。如果我错了，请纠正我，但我认为这是因为我将它作为字符串传递，那么如何实现这一点呢

提前感谢

您需要使用该对象

newregexp（查询，“gi”）

。

return (new RegExp(query, 'gi')).test(food.food);