vue实战：打印小票的实现方法

lodop地址: http://www.c-lodop.com/download.html

//==本JS是加载Lodop插件或Web打印服务CLodop/Lodop7的综合示例，可直接使用，建议理解后融入自己程序==  //用双端口加载主JS文件Lodop.js(或CLodopfuncs.js兼容老版本)以防其中某端口被占:  var  MainJS  =  "CLodopfuncs.js",   URL_WS1  =  "ws://localhost:8000/"  +  MainJS,                //ws用8000/18000   URL_WS2  =  "ws://localhost:18000/"  +  MainJS,   URL_HTTP1  =  "http://localhost:8000/"  +  MainJS,              //http用8000/18000   URL_HTTP2  =  "http://localhost:18000/"  +  MainJS,   URL_HTTP3  =  "https://localhost.lodop.net:8443/"  +  MainJS; //https用8000/8443  var  CreatedOKLodopObject, CLodopIsLocal, LoadJsState;  //==判断是否需要CLodop(那些不支持插件的浏览器):==  export  function  needCLodop() {   try {   var  ua  =  navigator.userAgent;   if (ua.match(/WindowssPhone/i) ||   ua.match(/iPhone|iPod|iPad/i) ||   ua.match(/Android/i) ||   ua.match(/EdgeD?d+/i))   return  true;   var  verTrident  =  ua.match(/TridentD?d+/i);   var  verIE  =  ua.match(/MSIED?d+/i);   var  verOPR  =  ua.match(/OPRD?d+/i);   var  verFF  =  ua.match(/FirefoxD?d+/i);   var  x64  =  ua.match(/x64/i);   if ((!verTrident) && (!verIE) && (x64)) return  true;   else  if (verFF) {   verFF  =  verFF[0].match(/d+/);   if ((verFF[0] >=  41) || (x64)) return  true;  } else  if (verOPR) {   verOPR  =  verOPR[0].match(/d+/);   if (verOPR[0] >=  32) return  true;  } else  if ((!verTrident) && (!verIE)) {   var  verChrome  =  ua.match(/ChromeD?d+/i);   if (verChrome) {   verChrome  =  verChrome[0].match(/d+/);   if (verChrome[0] >=  41) return  true;              }          }   return  false;  } catch (err) {   return  true;      }  }  //==检查加载成功与否，如没成功则用http(s)再试==  //==低版本CLODOP6.561/Lodop7.043及前)用本方法==  export  function  checkOrTryHttp() {   if (window.getCLodop) {   LoadJsState  =  "complete";   return  true;      }   if (LoadJsState  ==  "loadingB"  ||  LoadJsState  ==  "complete") return;   LoadJsState  =  "loadingB";   var  head  =  document.head  ||  document.getElementsByTagName("head")[0] ||  document.documentElement;   var  JS1  =  document.createElement("script")  , JS2  =  document.createElement("script")  , JS3  =  document.createElement("script");   JS1.src  =  URL_HTTP1;   JS2.src  =  URL_HTTP2;   JS3.src  =  URL_HTTP3;   JS1.onload  =  JS2.onload  =  JS3.onload  =  JS2.onerror  =  JS3.onerror  =  function () { LoadJsState  =  "complete"; }   JS1.onerror  =  function (e) {   if (window.location.protocol  !==  'https:')   head.insertBefore(JS2, head.firstChild); else   head.insertBefore(JS3, head.firstChild);      }   head.insertBefore(JS1, head.firstChild);  }  //==加载Lodop对象的主过程:==  (function  loadCLodop() {   if (!needCLodop()) return;   CLodopIsLocal  =  !!((URL_WS1  +  URL_WS2).match(///localho|//127.0.0./i));   LoadJsState  =  "loadingA";   if (!window.WebSocket  &&  window.MozWebSocket) window.WebSocket  =  window.MozWebSocket;   //ws方式速度快(小于200ms)且可避免CORS错误,但要求Lodop版本足够新:   try {   var  WSK1  =  new  WebSocket(URL_WS1);   WSK1.onopen  =  function (e) { setTimeout("checkOrTryHttp();", 200); }   WSK1.onmessage  =  function (e) { if (!window.getCLodop) eval(e.data); }   WSK1.onerror  =  function (e) {   var  WSK2  =  new  WebSocket(URL_WS2);   WSK2.onopen  =  function (e) { setTimeout("checkOrTryHttp();", 200); }   WSK2.onmessage  =  function (e) { if (!window.getCLodop) eval(e.data); }   WSK2.onerror  =  function (e) { checkOrTryHttp(); }          }  } catch (e) {   checkOrTryHttp();      }  })();  //==获取LODOP对象主过程,判断是否安装、需否升级:==  export  function  getLodop(oOBJECT, oEMBED) {   var  strFontTag  =  "<br><font color='#FF00FF'>打印控件";   var  strLodopInstall  =  strFontTag  +  "未安装!点击这里<a href='install_lodop32.exe' target='_self'>执行安装</a>";   var  strLodopUpdate  =  strFontTag  +  "需要升级!点击这里<a href='install_lodop32.exe' target='_self'>执行升级</a>";   var  strLodop64Install  =  strFontTag  +  "未安装!点击这里<a href='install_lodop64.exe' target='_self'>执行安装</a>";   var  strLodop64Update  =  strFontTag  +  "需要升级!点击这里<a href='install_lodop64.exe' target='_self'>执行升级</a>";   var  strCLodopInstallA  =  "<br><font color='#FF00FF'>Web打印服务CLodop未安装启动，点击这里<a href='CLodop_Setup_for_Win32NT.exe' target='_self'>下载执行安装</a>";   var  strCLodopInstallB  =  "<br>（若此前已安装过，可<a href='CLodop.protocol:setup' target='_self'>点这里直接再次启动</a>）";   var  strCLodopUpdate  =  "<br><font color='#FF00FF'>Web打印服务CLodop需升级!点击这里<a href='CLodop_Setup_for_Win32NT.exe' target='_self'>执行升级</a>";   var  strLodop7FontTag  =  "<br><font color='#FF00FF'>Web打印服务Lodop7";   var  strLodop7HrefX86  =  "点击这里<a href='Lodop7_Linux_X86_64.tar.gz' target='_self'>下载安装</a>(下载后解压，点击lodop文件开始执行)";   var  strLodop7HrefARM  =  "点击这里<a href='Lodop7_Linux_ARM64.tar.gz'  target='_self'>下载安装</a>(下载后解压，点击lodop文件开始执行)";   var  strLodop7Install_X86  =  strLodop7FontTag  +  "未安装启动，"  +  strLodop7HrefX86;   var  strLodop7Install_ARM  =  strLodop7FontTag  +  "未安装启动，"  +  strLodop7HrefARM;   var  strLodop7Update_X86  =  strLodop7FontTag  +  "需升级，"  +  strLodop7HrefX86;   var  strLodop7Update_ARM  =  strLodop7FontTag  +  "需升级，"  +  strLodop7HrefARM;   var  strInstallOK  =  "，成功后请刷新本页面或重启浏览器。</font>";   var  LODOP;   try {   var  isWinIE  = (/MSIE/i.test(navigator.userAgent)) || (/Trident/i.test(navigator.userAgent));   var  isWinIE64  =  isWinIE  && (/x64/i.test(navigator.userAgent));   var  isLinuxX86  = (/Linux/i.test(navigator.platform)) && (/x86/i.test(navigator.platform));   var  isLinuxARM  = (/Linux/i.test(navigator.platform)) && (/aarch/i.test(navigator.platform));   if (needCLodop() ||  isLinuxX86  ||  isLinuxARM) {   try {   LODOP  = window.getCLodop();  } catch (err) { }   if (!LODOP  &&  LoadJsState  !==  "complete") {   if (!LoadJsState)   alert("未曾加载Lodop主JS文件，请先调用loadCLodop过程."); else   alert("网页还没下载完毕，请稍等一下再操作.");   return;              }   var  strAlertMessage;   if (!LODOP) {   if (isLinuxX86)   strAlertMessage  =  strLodop7Install_X86;   else  if (isLinuxARM)   strAlertMessage  =  strLodop7Install_ARM;   else   strAlertMessage  =  strCLodopInstallA  + (CLodopIsLocal  ?  strCLodopInstallB  :  "");   document.body.innerHTML = strAlertMessage + strInstallOK + document.body.innerHTML;   return;  } else {   if (isLinuxX86  &&  LODOP.CVERSION <  "7.0.4.3")   strAlertMessage  =  strLodop7Update_X86;   else  if (isLinuxARM  &&  LODOP.CVERSION <  "7.0.4.3")   strAlertMessage  =  strLodop7Update_ARM;   else  if (CLODOP.CVERSION <  "6.5.7.0")   strAlertMessage  =  strCLodopUpdate;   if (strAlertMessage)   document.body.innerHTML  =  strAlertMessage  +  strInstallOK  +  document.body.innerHTML;              }  } else {   //==如果页面有Lodop插件就直接使用,否则新建:==   if (oOBJECT  ||  oEMBED) {   if (isWinIE)   LODOP  = oOBJECT;   else   LODOP  =  oEMBED;  } else  if (!CreatedOKLodopObject) {   LODOP  =  document.createElement("object");   LODOP.setAttribute("width", 0);   LODOP.setAttribute("height", 0);   LODOP.setAttribute("style", "position:absolute;left:0px;top:-100px;width:0px;height:0px;");   if (isWinIE)   LODOP.setAttribute("classid", "clsid:2105C259-1E0C-4534-8141-A753534CB4CA");   else   LODOP.setAttribute("type", "application/x-print-lodop");   document.documentElement.appendChild(LODOP);   CreatedOKLodopObject  =  LODOP;  } else   LODOP  =  CreatedOKLodopObject;   //==Lodop插件未安装时提示下载地址:==   if ((!LODOP) || (!LODOP.VERSION)) {   document.body.innerHTML  = (isWinIE64  ?  strLodop64Install  :  strLodopInstall) +  strInstallOK  +  document.body.innerHTML;   return  LODOP;              }   if (LODOP.VERSION <  "6.2.2.6") {   document.body.innerHTML  = (isWinIE64  ?  strLodop64Update  :  strLodopUpdate) +  strInstallOK  +  document.body.innerHTML;              }          }   //===如下空白位置适合调用统一功能(如注册语句、语言选择等):=======================   //===============================================================================   return  LODOP;  } catch (err) {   alert("getLodop出错:"  +  err);      }  }

myPreview1() {   // this.CreateImage();   // this.LODOP.PRINT();   let  LODOP  =  getLodop();   console.log(' LODOP', LODOP)   var  strHTML  =  document.getElementById("box").innerHTML;   LODOP.PRINT_INIT("")   LODOP.SET_LICENSES("", "EE0887D00FCC7D29375A695F728489A6", "C94CEE276DB2187AE6B65D56B3FC2848", ""); //去掉测试版本   // LODOP.SET_PRINT_PAGESIZE(3, "80mm", "10mm", "CreateCustomPage"); //80打印机不需要加这行   LODOP.SET_PRINT_STYLE("FontSize", 15); // 设置打印字体   LODOP.SET_PRINT_STYLE("Bold", 1); // 设置加粗   LODOP.SET_PRINT_MODE("PRINT_PAGE_PERCENT", "Height:90%");   LODOP.SET_PRINT_MODE("PRINT_PAGE_PERCENT", "Full-Width");   LODOP.ADD_PRINT_HTM(10, 10, "90%", "70%", strHTML);   LODOP.PRINT();//   // this.LODOP.PREVIEW()          },