Challenge 2 / 2

Say we have a component with a prop title defined using the simple syntax:

props: ['title'],

But now, we'd like Vue to be able to do some validation for us when the component is rendered: we want title to accept a String and to be required. How can we do this?

props: {
    title: {
        type: String,
        required,
    },
},

props: {
    title: [String, true],
},

props: {
    title: {
        type: String,
        required: true,
    },
},

props: {
    title: {
        type: new String(),
        required: true,
    },
},

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