What is the best way to iterate over a proxy array in Vue?

Within the data() method, I have defined an array called exampleArray.

When mounted(), a function is called to add elements to this array.

Upon logging this.exampleArray, the result shows as a proxy object.

In order to iterate through this array in another function, it is recommended to use toRaw() to retrieve the unproxied array.

I attempted console.log(toRaw(this.examplearray)) which initially displayed an empty array when collapsed, but expanding it revealed the actual contents. See Console Picture

However, checking console.log(toRaw(this.exampleArray).length) returned 0, preventing me from using a forEach loop on it.

typescriptvue.js

Answer №1

Since the release of Vue 3, developers now have two options to choose from: the Options API and Composition API. If you're currently using the older Options API, it's recommended that you familiarize yourself with the differences between the two in order to access relevant online resources tailored to your chosen API. While the Vue documentation defaults to showcasing the Composition API, there is a toggle available in the top-left corner to switch to the Options API.

In regard to your query, when working with the Options API, there is no need for any special handling. Simply treat this.exampleArray as a regular JavaScript array, as Vue will take care of the Proxy wrapping/unwrapping process for you.

this.exampleArray.forEach(i => console.log(i))

The method toRaw() is specifically intended for use with the Composition API. You can find detailed information about this in the "Composition API" section of the sidebar on the official Vue documentation website. Since you are utilizing the Options API, this feature would not be applicable to your current setup.

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