如何将含多组单双引号的内容封装到var变量中？

以下几种方法可轻松解决你遇到的引号嵌套问题：

1. 使用ES6模板字符串（推荐） #

用反引号（`）包裹整个Schema内容，模板字符串允许直接包含单引号和双引号，无需额外转义：

const schema = `{
      "@context": "https://schema.org",
      "@type": "FAQPage",
      "mainEntity": [{
        "@type": "Question",
        "name": "What is the return policy?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "<p>Most unopened items in new condition and returned within <b>90 days</b> will receive a refund or exchange. Some items have a modified return policy noted on the receipt or packing slip. Items that are opened or damaged or do not have a receipt may be denied a refund or exchange. Items purchased online or in-store may be returned to any store.</p><p>Online purchases may be returned via a major parcel carrier. <a href=http://example.com/returns> Click here </a> to initiate a return.</p>"
        }
      }, {
        "@type": "Question",
        "name": "How long does it take to process a refund?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "We will reimburse you for returned items in the same way you paid for them. For example, any amounts deducted from a gift card will be credited back to a gift card. For returns by mail, once we receive your return, we will process it within 4–5 business days. It may take up to 7 days after we process the return to reflect in your account, depending on your financial institution's processing time."
        }
      }, {
        "@type": "Question",
        "name": "What is the policy for late/non-delivery of items ordered online?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "<p>Our local teams work diligently to make sure that your order arrives on time, within our normaldelivery hours of 9AM to 8PM in the recipient's time zone. During  busy holiday periods like Christmas, Valentine's and Mother's Day, we may extend our delivery hours before 9AM and after 8PM to ensure that all gifts are delivered on time. If for any reason your gift does not arrive on time, our dedicated Customer Service agents will do everything they can to help successfully resolve your issue.</p><p><a href=https://example.com/orders/>Click here</a> to complete the form with your order-related question(s).</p>"
        }
      }, {
        "@type": "Question",
        "name": "When will my credit card be charged?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "We'll attempt to securely charge your credit card at the point of purchase online. If there's a problem, you'll be notified on the spot and prompted to use another card. Once we receive verification of sufficient funds, your payment will be completed and transferred securely to us. Your account will be charged in 24 to 48 hours."
        }
      }, {
        "@type": "Question",
        "name": "Will I be charged sales tax for online orders?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text":"Local and State sales tax will be collected if your recipient's mailing address is in: <ul><li>Arizona</li><li>California</li><li>Colorado</li></ul>"}
        }]
    }`;

2. 直接将JSON作为对象字面量赋值 #

如果你的目标是操作这个Schema的JS对象而非字符串，直接把它当作对象赋值给变量即可，完全不需要处理引号问题：

const schema = {
      "@context": "https://schema.org",
      "@type": "FAQPage",
      "mainEntity": [{
        "@type": "Question",
        "name": "What is the return policy?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "<p>Most unopened items in new condition and returned within <b>90 days</b> will receive a refund or exchange. Some items have a modified return policy noted on the receipt or packing slip. Items that are opened or damaged or do not have a receipt may be denied a refund or exchange. Items purchased online or in-store may be returned to any store.</p><p>Online purchases may be returned via a major parcel carrier. <a href=http://example.com/returns> Click here </a> to initiate a return.</p>"
        }
      }, {
        "@type": "Question",
        "name": "How long does it take to process a refund?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "We will reimburse you for returned items in the same way you paid for them. For example, any amounts deducted from a gift card will be credited back to a gift card. For returns by mail, once we receive your return, we will process it within 4–5 business days. It may take up to 7 days after we process the return to reflect in your account, depending on your financial institution's processing time."
        }
      }, {
        "@type": "Question",
        "name": "What is the policy for late/non-delivery of items ordered online?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "<p>Our local teams work diligently to make sure that your order arrives on time, within our normaldelivery hours of 9AM to 8PM in the recipient's time zone. During  busy holiday periods like Christmas, Valentine's and Mother's Day, we may extend our delivery hours before 9AM and after 8PM to ensure that all gifts are delivered on time. If for any reason your gift does not arrive on time, our dedicated Customer Service agents will do everything they can to help successfully resolve your issue.</p><p><a href=https://example.com/orders/>Click here</a> to complete the form with your order-related question(s).</p>"
        }
      }, {
        "@type": "Question",
        "name": "When will my credit card be charged?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text": "We'll attempt to securely charge your credit card at the point of purchase online. If there's a problem, you'll be notified on the spot and prompted to use another card. Once we receive verification of sufficient funds, your payment will be completed and transferred securely to us. Your account will be charged in 24 to 48 hours."
        }
      }, {
        "@type": "Question",
        "name": "Will I be charged sales tax for online orders?",
        "acceptedAnswer": {
          "@type": "Answer",
          "text":"Local and State sales tax will be collected if your recipient's mailing address is in: <ul><li>Arizona</li><li>California</li><li>Colorado</li></ul>"}
        }]
    };

3. 转义字符串中的引号（兼容旧环境） #

如果无法使用ES6特性，可将字符串中的双引号前添加反斜杠（\"），再用单引号包裹整个内容：

const schema = '{
      \"@context\": \"https://schema.org\",
      \"@type\": \"FAQPage\",
      \"mainEntity\": [{
        \"@type\": \"Question\",
        \"name\": \"What is the return policy?\",
        \"acceptedAnswer\": {
          \"@type\": \"Answer\",
          \"text\": \"<p>Most unopened items in new condition and returned within <b>90 days</b> will receive a refund or exchange. Some items have a modified return policy noted on the receipt or packing slip. Items that are opened or damaged or do not have a receipt may be denied a refund or exchange. Items purchased online or in-store may be returned to any store.</p><p>Online purchases may be returned via a major parcel carrier. <a href=http://example.com/returns> Click here </a> to initiate a return.</p>\"
        }
      }, {
        \"@type\": \"Question\",
        \"name\": \"How long does it take to process a refund?\",
        \"acceptedAnswer\": {
          \"@type\": \"Answer\",
          \"text\": \"We will reimburse you for returned items in the same way you paid for them. For example, any amounts deducted from a gift card will be credited back to a gift card. For returns by mail, once we receive your return, we will process it within 4–5 business days. It may take up to 7 days after we process the return to reflect in your account, depending on your financial institution's processing time.\"
        }
      }, {
        \"@type\": \"Question\",
        \"name\": \"What is the policy for late/non-delivery of items ordered online?\",
        \"acceptedAnswer\": {
          \"@type\": \"Answer\",
          \"text\": \"<p>Our local teams work diligently to make sure that your order arrives on time, within our normaldelivery hours of 9AM to 8PM in the recipient's time zone. During  busy holiday periods like Christmas, Valentine's and Mother's Day, we may extend our delivery hours before 9AM and after 8PM to ensure that all gifts are delivered on time. If for any reason your gift does not arrive on time, our dedicated Customer Service agents will do everything they can to help successfully resolve your issue.</p><p><a href=https://example.com/orders/>Click here</a> to complete the form with your order-related question(s).</p>\"
        }
      }, {
        \"@type\": \"Question\",
        \"name\": \"When will my credit card be charged?\",
        \"acceptedAnswer\": {
          \"@type\": \"Answer\",
          \"text\": \"We'll attempt to securely charge your credit card at the point of purchase online. If there's a problem, you'll be notified on the spot and prompted to use another card. Once we receive verification of sufficient funds, your payment will be completed and transferred securely to us. Your account will be charged in 24 to 48 hours.\"
        }
      }, {
        \"@type\": \"Question\",
        \"name\": \"Will I be charged sales tax for online orders?\",
        \"acceptedAnswer\": {
          \"@type\": \"Answer\",
          \"text\":\"Local and State sales tax will be collected if your recipient's mailing address is in: <ul><li>Arizona</li><li>California</li><li>Colorado</li></ul>\"}
        }]
    }';

内容的提问来源于stack exchange，提问作者DNa