javaScript connects to printer and prints receipt example sharing
This article mainly shares with you an example of javaScript linking to a printer and printing receipts. It has a good reference value and I hope it will be helpful to everyone. Let’s follow the editor to take a look, I hope it can help everyone.
As shown below:
<!-- <!DOCTYPE html> -->
<meta>
<script></script>
<script></script>
<script></script>
<script>
function doPrint(){
bdhtml=window.document.body.innerHTML;
sprnstr="<!--startprint-->";
eprnstr="<!--b-->";
prnhtml=bdhtml.substr(bdhtml.indexOf(sprnstr)+17);
prnhtml=prnhtml.substring(0,prnhtml.indexOf(eprnstr));
window.document.body.innerHTML=prnhtml;
window.print();
top.layer.closeAll();
}
function closes (){
top.layer.closeAll();
}
function downPdf(){
document.getElementById("dayin").style.display = "none";
document.getElementById("baocun").style.display = "none";
html2canvas(document.body, {
onrendered:function(canvas) {
var contentWidth = canvas.width;
var contentHeight = canvas.height;
//一页pdf显示html页面生成的canvas高度;
var pageHeight = contentWidth / 592.28 * 841.89;
//未生成pdf的html页面高度
var leftHeight = contentHeight;
//pdf页面偏移
var position = 0;
//a4纸的尺寸[595.28,841.89]，html页面生成的canvas在pdf中图片的宽高
var imgWidth = 595.28;
var imgHeight = 592.28/contentWidth * contentHeight;
var pageData = canvas.toDataURL('image/jpeg', 1.0);
var pdf = new jsPDF('', 'pt', 'a4');
//有两个高度需要区分，一个是html页面的实际高度，和生成pdf的页面高度(841.89)
//当内容未超过pdf一页显示的范围，无需分页
if (leftHeight < pageHeight) {
pdf.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight );
} else {
while(leftHeight > 0) {
pdf.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight)
leftHeight -= pageHeight;
position -= 841.89;
//避免添加空白页
if(leftHeight > 0) {
pdf.addPage();
}
}
}
pdf.save(document.getElementById("emNo").innerText+"("+document.getElementById("dt").innerText+').pdf');
}
})
document.getElementById("baocun").style.display = "";
document.getElementById("dayin").style.display = "";
}
</script>
<p>
<button><i></i>打印</button>
<button><i></i>保存</button>
</p>
<!--startprint-->
<br>
<p>
</p>
| 新XXXXX物业服务中心 | ||||||
| 收费单据 | ||||||
| 收票类型：电费 | 缴费日期： | ${emfee.dt} | ||||
| 户名 | ${emfee.userName} | 表号 | ${emfee.emNo} | 房号 | ${emfee.num} | |
| 起止时间 | ${emfee.emDt}至${emfee.startDt} | 缴费金额 | ${emfee.tranMoney} | 倍率 | ${emfee.emRate} | |
| 用电量 | 时段 | 起止表码 | 倍率前用量 | 本次用量 | 单价 | 本次电费 |
| 尖 | ${emfee.mosaicJian} | ${emfee.jianQuantity} | ${emfee.blJian} | ${emfee.jian} | ${emfee.jianFee} | |
| 峰 | ${emfee.mosaicFeng} | ${emfee.fengQuantity} | ${emfee.blFeng} | ${emfee.feng} | ${emfee.fengFee} | |
| 平 | ${emfee.mosaicPing} | ${emfee.pingQuantity} | ${emfee.blPing} | ${emfee.ping} | ${emfee.pingFee} | |
| 谷 | ${emfee.mosaicGu} | ${emfee.guQuantity} | ${emfee.blGu} | ${emfee.gu} | ${emfee.guFee} | |
| 总 | ${emfee.mosaicZong} | ${emfee.quantity} | ${emfee.blquantity} | —— | ${emfee.electFee} | |
| 电费 | 上次剩余(元) | 本期已用(元) | 本次缴费(元) | 本次剩余(元) | ||
| ${emfee.lastRemainQ} | ${emfee.electFee} | ${emfee.tranMoney} | ${emfee.remainQ} | |||
| 收款人： | 付款人： |
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