All files / roosterjs-content-model-dom/lib/modelApi/typeCheck isBlockGroupOfType.ts

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import type {
    ContentModelBlock,
    ContentModelBlockGroup,
    ReadonlyContentModelBlock,
    ReadonlyContentModelBlockGroup,
    TypeOfBlockGroup,
} from 'roosterjs-content-model-types';
 
/**
 * Check if the given content model block or block group is of the expected block group type
 * @param input The object to check
 * @param type The expected type
 */
export function isBlockGroupOfType<T extends ContentModelBlockGroup>(
    input: ContentModelBlock | ContentModelBlockGroup | null | undefined,
    type: TypeOfBlockGroup<T>
): input is T;
 
/**
 * Check if the given content model block or block group is of the expected block group type (Readonly)
 * @param input The object to check
 * @param type The expected type
 */
export function isBlockGroupOfType<T extends ReadonlyContentModelBlockGroup>(
    input: ReadonlyContentModelBlock | ReadonlyContentModelBlockGroup | null | undefined,
    type: TypeOfBlockGroup<T>
): input is T;
 
export function isBlockGroupOfType<
    T extends ContentModelBlockGroup | ReadonlyContentModelBlockGroup
>(
    input:
        | ReadonlyContentModelBlock
        | ReadonlyContentModelBlockGroup
        | ContentModelBlock
        | ContentModelBlockGroup
        | null
        | undefined,
    type: TypeOfBlockGroup<T>
): input is T {
    const item = <T | null | undefined>input;
 
    return item?.blockGroupType == type;
}