getOpenBDInfo

async getOpenBDInfo(item): Promise<any> {
    const books = await fetch('https://api.openbd.jp/v1/get?isbn='+item.isbn).then(r => r.json()).catch(error => console.log(error))
    if (books.length>0) {
        const book = books[0]
        console.log(book)
        // 紹介・目次
        let description = null
        let descriptionLong = null
        let tableOfContents = null
        const CollateralDetails = book.onix.CollateralDetail.TextContent
        if (CollateralDetails) {
            for (const CollateralDetail of CollateralDetails) {
                const TextType = CollateralDetail.TextType
                if (TextType === '02') description = CollateralDetail.Text
                if (TextType === '03') descriptionLong = CollateralDetail.Text
                if (TextType === '04') tableOfContents = CollateralDetail.Text
            }
        }
        const maegakinado = typeof book.hanmoto.maegakinado!=='undefined' ? book.hanmoto.maegakinado : null
        const hastameshiyomi = typeof book.hanmoto.hastameshiyomi!=='undefined' ? book.hanmoto.hastameshiyomi : null
        return {
            'description': description,
            'descriptionLong': descriptionLong,
            'tableOfContents': tableOfContents,
            'maegakinado': maegakinado,
            'hastameshiyomi': hastameshiyomi,
        }
    }
    return null
}

const openBDInfo = await this.getOpenBDInfo(viewItem)