Vue.js 面试题与答案
问题 21. Explain the concept of scoped slots in Vue.js.
Scoped slots in Vue.js allow a child component to communicate data to a parent component. It provides more flexibility in passing data from child to parent.
问题 22. What is the difference between mixins and extends in Vue.js?
Mixins allow you to reuse and share logic across multiple components, while extends in Vue.js create an extended constructor for a component, inheriting options from another component.
问题 23. Explain the purpose of the key attribute in Vue.js.
The key attribute in Vue.js is used to give each rendered element a unique identifier, helping Vue efficiently update the DOM by reusing existing elements instead of re-rendering.
问题 24. How does the v-model directive work in Vue.js?
The v-model directive in Vue.js is used for two-way data binding on form input elements. It automatically syncs the input value with a variable in the data.
问题 25. What is the purpose of the provide/inject feature in Vue.js?
Provide/inject in Vue.js allows a component to provide data that can be injected into its descendants. It helps in prop drilling by providing a clean way to share state without using props.
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