CODE EXAMPLE FOR JAVASCRIPT

apollo uselazyquery oncompleted

import React from 'react';
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import { useLazyQuery } from '@apollo/client';
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function DelayedQuery() {
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  const [getDog, { loading, error, data }] = useLazyQuery(GET_DOG_PHOTO);
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  if (loading) return <p>Loading ...</p>;
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  if (error) return `Error! ${error}`;
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  return (
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    <div>
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      {data?.dog && <img src={data.dog.displayImage} />}
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      <button onClick={() => getDog({ variables: { breed: 'bulldog' } })}>
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        Click me!
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      </button>
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    </div>
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  );
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}