Herald for React Native
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    Interface ImpressionOptions

    interface ImpressionOptions {
        minVisibleMs?: number;
        threshold?: number;
    }
    Index
    minVisibleMs?: number

    How long it must stay that visible, in milliseconds. 0 by default.

    threshold?: number

    How much of an item must be on screen: from 0, any part, to 1, all of it. 0.5 by default.