Vue.js的計算屬性不能直接接受參數(shù)，這是其設(shè)計特性決定的，但可以通過方法或返回函數(shù)的計算屬性間接實現(xiàn)。1. 使用方法（methods）：可傳遞參數(shù)并用于模板或監(jiān)聽器中，如formatName('John', 'Doe')；2. 將計算屬性封裝為返回函數(shù)的形式：如formatName返回一個接受參數(shù)的函數(shù)，并在模板中調(diào)用formatName()('Jane', 'Smith')。通常推薦使用方法，因其更清晰易維護，而返回函數(shù)的方式適用于需要結(jié)合內(nèi)部狀態(tài)與外部值的特殊場景。

Yes, computed properties in Vue.js cannot directly accept arguments. That’s just how the feature is designed — computed properties are meant to be used as reactive data transformations without external inputs. If you try to call a computed property like a method (with parentheses and arguments), it won’t work as expected.

But don’t worry — there are clean ways to get around this depending on what you're trying to do.

Use a Method Instead

If you need something that behaves like a computed property but also accepts arguments, a method is usually the right choice.

Methods can take parameters and still be used inside templates or watchers. The only difference is that they aren’t cached based on their dependencies like computed props are.

For example:

methods: {
  formatName(firstName, lastName) {
    return `${firstName} ${lastName}`;
  }
}

In your template:

<div>{{ formatName('John', 'Doe') }}</div>

This works fine, even though it’s not cached — which is okay if the logic isn’t too heavy.

Wrap a Computed Property with a Function

If you really want to keep using a computed-style function but pass in some dynamic values, you can make your computed property return a function.

Here's how:

computed: {
  formatName() {
    return (firstName, lastName) => {
      return `${firstName} ${lastName}`;
    };
  }
}

Then in your template:

<div>{{ formatName()('Jane', 'Smith') }}</div>

It looks a little odd at first, but it works. And because it's technically a computed property returning a function, Vue won’t complain. Just note that caching won’t help here either since it's invoked with arguments every time.

When Should You Actually Do This?

Honestly, most of the time, just using a method is clearer and more straightforward. The wrapped function trick might come in handy in specific edge cases — for instance, when you’re building reusable computed logic that depends on both internal state and an external value.

But unless you have a solid reason to use a computed prop with arguments, stick with methods. They’re easier to read, test, and debug.

So, to recap: no, computed properties don't support arguments out of the box — but methods or function-returning computed props can fill the gap when needed.

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