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docs: Add example for Precondition #601

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merged 1 commit into from Apr 16, 2019
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docs: Add example for Precondition #601

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10 changes: 10 additions & 0 deletions dev/src/index.ts
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Expand Up @@ -133,6 +133,16 @@ const GRPC_UNAVAILABLE = 14;
* can be restricted to only apply to documents that match the specified
* conditions.
*
* @example
* const documentRef = firestore.doc('coll/doc');
*
* documentRef.get().then(snapshot => {
* const updateTime = snapshot.updateTime;
*
* console.log(`Deleting document at update time: ${updateTime.toDate()}`);
* return documentRef.delete({ lastUpdateTime: updateTime });
* });
*
* @property {string} lastUpdateTime The update time to enforce (specified as
* an ISO 8601 string).
* @typedef {Object} Precondition
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