Can calculated properties in Vue have parameters?

Computed properties in Vue can have parameters, which are used to customize calculation behavior and transfer data. The syntax is computedPropertyWithArgs(arg1, arg2) { }. Parameters can be passed when used in templates, but the parameters must be responsive. Yes, the internal state cannot be modified.

Can calculated properties in Vue have parameters?

Answer: Yes, calculation in Vue Properties can have parameters.

Detailed description

Computed properties in Vue are a special type of reactive properties that are calculated based on the values ​​of other reactive properties. Computed properties can have parameters, just like ordinary methods. Parameters can be used to customize the behavior of computed properties or to pass data from other components or stores.

Syntax

The syntax of a computed property with parameters is as follows:

<code class="javascript">computed: {
  computedPropertyWithArgs(arg1, arg2) {
    // 计算逻辑
  }
}</code>

Usage

With Computed properties with parameters can be used in templates just like ordinary calculated properties. Parameters can be passed when calling a computed property.

For example, suppose we have a computed property fullName that concatenates the firstName and lastName properties together. We can use parameters to pass separator characters to customize the connection string.

<code class="javascript">computed: {
  fullName(separator = ' ') {
    return this.firstName + separator + this.lastName;
  }
}</code>

Then, in the template, we can call the computed property using:

<code class="html"><p>全名：{{ fullName(' | ') }}</p></code>

This will output the values ​​of the firstName and lastName properties , separated by | characters.

Notes

• Parameters for computed properties should be reactive, meaning their values ​​may change over time.
• Parameters of computed properties cannot be used to modify internal state because computed properties are read-only.
• If the value of the parameter changes, the calculated property will be recalculated.

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