Vue中的方法与计算

来自 docs

..computed属性根据其依赖关系进行缓存。仅当某些依赖项已更改时，计算属性才会重新评估。

另一方面，如果您想缓存数据，则使用Computed属性，如果您不希望缓存数据，请使用简单的Method属性。

Here’s a breakdown of this question.

When to use methods

• To react to some event happening in the DOM
• To call a function when something happens in your component.
• You can call a method from computed properties or watchers.

When to use computed properties

• You need to compose new data from existing data sources
• You have a variable you use in your template that’s built from one or more data properties
• You want to reduce a complicated, nested property name to a more readable and easy to use one (but update it when the original property changes)
• You need to reference a value from the template. In this case, creating a computed property is the best thing, because it’s cached.
• You need to listen to changes of more than one data property