修改了imageSrc的值，原来是没有值得

feige

2023-05-04 06f409db10a6958a1b902753844a28715c92101a

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export function isPromise(maybePromise) {
    return (!!maybePromise &&
        !!maybePromise.then &&
        typeof maybePromise.then === 'function');
}