How can I determine if a prop Function is asynchronous?
Consider the following prop in my component:
callbackFunction: {
type: Function,
default: null,
},
Is there a way to validate this and ensure that the provided Function is declared as async?
It's not feasible nor necessary to determine if a function is asynchronous. It could simply be a regular function that returns a promise with the exact same outcome, making it impossible to distinguish its asynchronous nature without executing it.
There's really no need to confine a callback to being asynchronous. A reliable approach that accommodates any type of result would be:
if (this.callbackFunction)
await this.callbackFunction()
Absolutely, you have the ability to utilize props with a "validator" function in Vue.js. This allows for validation of props passed into components.
callbackFunction: {
type: Function,
validator(value) {
if (value?.constructor?.name === 'AsyncFunction') {
return true;
} else {
console.error('Function should be async');
return false;
}
},
default() {},
},
If you'd like to see an example of how this can be implemented, feel free to check out this link.
It's important to note that failing to meet these requirements won't cause any issues, but Vue will provide warnings in the browser's JavaScript console for your information.
It is not possible for props to be asynchronous, they must be synchronous. Therefore, validating async props is not feasible.
If you are looking for information on the different types of props available, check out this detailed page: https://vuejs.org/api/options-state.html#props
By the way, passing functions as props in Vue is considered an anti-pattern (unlike React). For a better understanding of how to achieve clean coding practices in Vue, take a look at this informative blog post.
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