blocks|key|490486|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|490487|是否有Chrome+API+(HTML5和Javascript)可以取代浏览器和本地安装的USB或以太网POS机之间的通信？|blockquote|490488|490489|490490|更新:+USB存在一个针对设备的纯HTML5解决方案，但目前很难找到示例，浏览器采用速度也很慢：|offset|length|style|BOLD|490491|仅适用于|490492|WebUSB设备，请选择浏览器。|unordered-list-item|490493|490494|关于HTML5和JavaScript，自从NPAPI被移除后，该解决方案倾向于涉及到本地主机的WebSocket，或云启用的打印机。|490495|此HTTP/WebSockets设计由以下用户使用：|490496|490497|Zebra+Link-OS和Cloud+Connect+(用于标签打印等)|490498|Epson+ePOS-Device+(用于收据、显示器、条形码和Cloud+Connect(用于标签打印，etc)|490499|PrintNode|490500|Google+Cloud+Print+(计划于12月退役)+2020)|490501|Neodynamic+TLClient+Print+(基于.NET的热敏printers)|490502|QZ+Tray+software+(+"JZebra/QZ-Print“的继任者)、标签、收据、任何未加工的东西、PDF、超文本标记语言、U盘刻度、|490503|条形码阅读器、串行设备)|490504|关于特定于销售点的打印，我一直无法找到满足这些需求的现成解决方案(广泛采用的纯HTML5和JavaScript+)，因此当前可以使用桌面安装的中间件或服务器端中间件来实现您所描述的内容。|490505|完整的免责声明，我们是QZ托盘的作者。|490506|entityMap|0|LINK|mutability|MUTABLE|url|https://developers.google.com/web/updates/2016/03/access-usb-devices-on-the-web|1|https://www.zebra.com/us/en/products-services/software/link-os/link-os-sdk.html|2|https://www.zebra.com/us/en/products-services/software/link-os/cloud-connect.html|3|https://reference.epson-biz.com/modules/ref_epos_device_js_en/index.php?content_id=139|4|5|https://www.printnode.com/|6|https://www.google.com/cloudprint/learn/|7|https://www.neodynamic.com/downloads/tlclientprint/|8|https://qz.io/download^0|0|0|0|0|0|D|0|0|0|6|0|0|0|0|0|0|6|7|1|E|D|2|0|6|B|3|W|D|4|0|0|9|5|0|0|I|6|0|0|P|7|0|0|G|8|0|0|0|0^^$0|@$1|2|3|-4|4|5|6|21|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|22|7|@]|8|@]|9|$]]|$1|D|3|-4|4|5|6|23|7|@]|8|@]|9|$]]|$1|E|3|-4|4|5|6|24|7|@]|8|@]|9|$]]|$1|F|3|G|4|5|6|25|7|@$H|26|I|27|J|K]]|8|@]|9|$]]|$1|L|3|M|4|5|6|28|7|@]|8|@]|9|$]]|$1|N|3|O|4|P|6|29|7|@]|8|@$H|2A|I|2B|1|2C]]|9|$]]|$1|Q|3|-4|4|5|6|2D|7|@]|8|@]|9|$]]|$1|R|3|S|4|5|6|2E|7|@]|8|@]|9|$]]|$1|T|3|U|4|5|6|2F|7|@]|8|@]|9|$]]|$1|V|3|-4|4|5|6|2G|7|@]|8|@]|9|$]]|$1|W|3|X|4|P|6|2H|7|@]|8|@$H|2I|I|2J|1|2K]|$H|2L|I|2M|1|2N]]|9|$]]|$1|Y|3|Z|4|P|6|2O|7|@]|8|@$H|2P|I|2Q|1|2R]|$H|2S|I|2T|1|2U]]|9|$]]|$1|10|3|11|4|P|6|2V|7|@]|8|@$H|2W|I|2X|1|2Y]]|9|$]]|$1|12|3|13|4|P|6|2Z|7|@]|8|@$H|30|I|31|1|32]]|9|$]]|$1|14|3|15|4|P|6|33|7|@]|8|@$H|34|I|35|1|36]]|9|$]]|$1|16|3|17|4|P|6|37|7|@]|8|@$H|38|I|39|1|3A]]|9|$]]|$1|18|3|19|4|5|6|3B|7|@]|8|@]|9|$]]|$1|1A|3|1B|4|5|6|3C|7|@]|8|@]|9|$]]|$1|1C|3|1D|4|5|6|3D|7|@]|8|@]|9|$]]|$1|1E|3|-4|4|5|6|3E|7|@]|8|@]|9|$]]]|1F|$1G|$4|1H|1I|1J|9|$1K|1L]]|1M|$4|1H|1I|1J|9|$1K|1N]]|1O|$4|1H|1I|1J|9|$1K|1P]]|1Q|$4|1H|1I|1J|9|$1K|1R]]|1S|$4|1H|1I|1J|9|$1K|1P]]|1T|$4|1H|1I|1J|9|$1K|1U]]|1V|$4|1H|1I|1J|9|$1K|1W]]|1X|$4|1H|1I|1J|9|$1K|1Y]]|1Z|$4|1H|1I|1J|9|$1K|20]]]]

<blockquote>
Is there a Chrome API (HTML5 and Javascript) that will be able to replace the communication between the browser and the locally installed POS printers in USB or Ethernet?
</blockquote>
Update: A pure HTML5 solution exists for USB devices, but examples are currently hard to find and browser adoption has been slow:
<ul>
<li><a href="https://developers.google.com/web/updates/2016/03/access-usb-devices-on-the-web" rel="nofollow noreferrer">WebUSB</a> USB devices only, select browsers.</li>
</ul>
In regards to HTML5 and JavaScript, since the removal of NPAPI, the solution tends to involve WebSocket to localhost, or cloud-enabled printers.
This HTTP/WebSockets design is used by:
<ul>
<li>Zebra <a href="https://www.zebra.com/us/en/products-services/software/link-os/link-os-sdk.html" rel="nofollow noreferrer">Link-OS</a> and <a href="https://www.zebra.com/us/en/products-services/software/link-os/cloud-connect.html" rel="nofollow noreferrer">Cloud Connect</a> (for label printing, etc)</li>
<li>Epson <a href="https://reference.epson-biz.com/modules/ref_epos_device_js_en/index.php?content_id=139" rel="nofollow noreferrer">ePOS-Device</a> (for receipts, display, barcode scanner)</li>
<li>Dymo <a href="http://developers.dymo.com/2015/09/24/dymo-label-framework-javascript-library-2-0-open-beta-2/" rel="nofollow noreferrer">JavaScript Framework 2.0</a> (for label printing, etc)</li>
<li><a href="https://www.printnode.com/" rel="nofollow noreferrer">PrintNode</a></li>
<li><a href="https://www.google.com/cloudprint/learn/" rel="nofollow noreferrer">Google Cloud Print</a> (Slated for retirement Dec 2020)</li>
<li><a href="https://www.neodynamic.com/downloads/tlclientprint/" rel="nofollow noreferrer">Neodynamic TLClient Print</a> (.NET-based for thermal printers)</li>
<li><a href="https://qz.io/download" rel="nofollow noreferrer">QZ Tray software</a> (the successor to &quot;JZebra/QZ-Print&quot;, labels, receipts, anything raw, PDFs, HTML, USB Scales, USB barcode readers, serial devices)</li>
</ul>
In regards to Point-Of-Sale specific printing, I have been unable to locate a ready solution that meets these needs (pure HTML5 and JavaScript, widely adopted), so either a Desktop-installed middle-ware or a server-side middle-ware is currently the way to achieve what you are describing.
Full disclaimer, we're the authors of QZ Tray.

blocks|key|3622664|text|你可以试试PrintNode，它有一个简单的桌面客户端和json+API。它真的很快，并且有很多库：https://github.com/PrintNode/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3622665|entityMap|0|LINK|mutability|MUTABLE|url|https://www.printnode.com/|1|https://github.com/PrintNode/^0|5|9|0|1E|T|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

You could try <a href="https://www.printnode.com" rel="nofollow">PrintNode</a> which has a simple desktop client and json API. It's really quick and has lots of libs: <a href="https://github.com/PrintNode/" rel="nofollow">https://github.com/PrintNode/</a>

blocks|key|3408108|text|我和Epson's+ePOS-Print+JavaScript+SDK在一起很走运。它是特定于Epson的，并且需要支持ePOS+(UB-E04/R04)的网络接口卡。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3408109|entityMap|0|LINK|mutability|MUTABLE|url|https://reference.epson-biz.com/modules/ref_epos_device_js_en/index.php?content_id=139^0|2|X|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I've had good luck with <a href="https://reference.epson-biz.com/modules/ref_epos_device_js_en/index.php?content_id=139" rel="nofollow noreferrer">Epson's ePOS-Print JavaScript SDK</a>. It is Epson specific and does require a network interface card that supports ePOS (UB-E04/R04).

We all know that NPAPI will be completely removed from Chrome in a few months.

What would be an alternative to the Jzebra/QZ Java plugin that makes raw printing (sending raw ESC/P commands) to POS printers?

Is there a Chrome API (HTML5 and Javascript) that will be able to replace the communication between the browser and the locally installed POS printers in USB or Ethernet?

Alternative to Jzebra/QZ Java Raw Print Plugin after NPAPI being dropped on Chrome Browser

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我们都知道NPAPI将在几个月内从Chrome中完全移除。Jzebra/QZ Java插件的替代方案是什么?Jzebra/QZ可以将原始打印(发送原始ESC/P命令)发送到POS打印机？是否有Chrome API (HTML5和Javascript)可以取代浏览器和本地安装的USB或以太网POS机之间的通信？

问在Chrome浏览器上拖放NPAPI后Jzebra/QZ Java原始打印插件的替代方案
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