Can i pass parameters in computed properties in vue js

In Vue.js, computed properties themselves cannot directly accept parameters. Computed properties are designed to cache values based on their dependencies, meaning they can only access the component's reactive data and recalculate when these reactive data change. Since computed properties internally cache based on their dependencies, they cannot accept parameters to dynamically determine the computation.

If you need functionality similar to passing parameters to computed properties, there are typically two alternative approaches:

1. Methods: You can use a method to receive parameters and return the computed value instead of using computed properties. However, note that unlike computed properties, methods do not cache results and are re-executed on every re-render.

2. Using a method to return a function: Another approach is to define a method that returns a function, which can then be used as a computed property and accepts parameters for computation. Although this function is not cached, you can use computed properties or other cached values within it.

Here is a simple example demonstrating how to use a method returning a function to simulate a computed property with parameters:

vue
<template>
  <div>
    <p>Message with prefix: {{ computedWithParam('Hello, ') }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      message: 'Vue'
    };
  },
  methods: {
    computedWithParam(prefix) {
      // Method returns a function
      return (suffix) => {
        // This function accepts parameters and returns the processed result
        return prefix + this.message + suffix;
      };
    }
  }
};
</script>

In this example, computedWithParam is a method that returns a function that can accept parameters, which can be called in the template and actual parameters passed in.

Overall, although computed properties do not support passing parameters, you can achieve similar functionality through the above methods.