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Add note regarding explicit prop declaration requirement #939

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Jun 7, 2017
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Add note regarding explicit prop declaration requirement #939

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3 changes: 3 additions & 0 deletions src/v2/guide/components.md
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Expand Up @@ -696,6 +696,7 @@ Vue.component('my-checkbox', {
event: 'change'
},
props: {
checked: Boolean,
// this allows using the `value` prop for a different purpose
value: String
},
Expand All @@ -717,6 +718,8 @@ The above will be equivalent to:
</my-checkbox>
```

<p class="tip">Note that you still have to declare the `checked` prop explicitly.</p>

### Non Parent-Child Communication

Sometimes two components may need to communicate with one-another but they are not parent/child to each other. In simple scenarios, you can use an empty Vue instance as a central event bus:
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