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What does readonly do in Vue's reactivity?

Q: What does readonly do in Vue's reactivity?

**readonly(obj)** returns a reactive proxy that warns and blocks mutations, while still tracking changes from the original source. It's useful for providing state to children (e.g. via provide) that they should consume but not modify.

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readonly(obj) returns a reactive proxy that warns and blocks mutations, while still tracking changes from the original source. It's useful for providing state to children (e.g. via provide) that they should consume but not modify.

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