javascript / intermediate
Snippet
Runtime Validation for Custom Events
You can validate the arguments passed to custom events by providing a validator function in defineEmits. If it returns false, Vue will output a warning in development, improving code reliability.
snippet.js
javascript
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const emit = defineEmits({submit: ({ email, password }) => {return email.includes('@') && password.length > 8;}});
vue
Breakdown
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submit: ({ email, password }) => {
Define a key matching the event name and a validation callback.
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return email.includes('@') && ...
Check if the payload meets specific criteria and return a boolean.