浏览器打印功能

使用的是print.js
在main.js里引入

import Print from './libs/print.js'
Vue.use(Print)

页面使用

  <div>
    <tepmlate v-show="list && list.length">
      <div class="print">
        <div class="print-btn">
          <Button size="large" @click="print">打印</Button>
        </div>
        <div
          id="print-content"
          ref="print-content"
          class="print-content">
          <div class="print-content-group" v-for="(item, index) in list" :key="index">
            <div class="print-content-title">
              <h2>流水表格打印</h2>
              <!--页码-->
              <div class="time-page">
                <div class="page">页码：第{{ index + 1 }}/{{ list.length }}页</div>
              </div>
            </div>
            <div class="print-content-table">
              <div class="table-wrap">
                <table cellspacing="0" cellpadding="0" border="0">
                  <tr>
                    <th
                      v-for="(item, index) in tableTh"
                      :key="index"
                      :style="{ width: item.width, textAlign: item.textAlign ? item.textAlign : 'left' }">
                      {{ item.name }}
                    </th>
                  </tr>
                  <tr v-for="(child, ind) in item" :key="ind">
                    <td>{{ child.name }}</td>
                    <td style="text-align: right">{{ child.amount }}</td>
                  </tr>
                </table>
              </div>
            </div>
            <div class="print-content-time">打印时间：{{ currentTime }}</div>
            <!--打印预览时自动分页-->
            <div style="page-break-after:always;"></div>
          </div>
        </div>
      </div>
    </tepmlate>
  </div>

tableTh: [
          {
            name: 'name,
            width: '50%'
          },
          {
            name: 'amount ',
            width: '50%',
            textAlign: 'right'
          }
        ],
list: []
// 接口获取到的list分组，每一组就是一页的数据
// 每页显示10条，自己定，保证每页不超出的情况，留点空白
this.list = this.group(this.list, 10)

group(array, subGroupLength) {
        let index = 0;
        let newArray = [];
        while(index < array.length) {
          newArray.push(array.slice(index, index += subGroupLength));
        }
        return newArray;
      }

// 打印
      print() {
        this.$print(this.$refs['print-content'], {
          // type: 'html',
          // targetStyles: ['*'], //重点  继承原来的样式，没有这个样式就是乱的
          // repeatTableHeader: true,  //重复表头
          // header: '',
        })
      }
mounted() {
        this.currentTime = new Date()
        let getBody = document.body
        let getHtml = document.documentElement
        getBody.style.overflow = 'overlay' // 防止出现空白页
        // 如果表格太宽，把页面缩小
        document.getElementsByTagName('body')[0].style.zoom = 0.92
      }
destroyed() {
      let getBody = document.body
      let getHtml = document.documentElement
      getBody.style.overflow = 'hidden'
      document.getElementsByTagName('body')[0].style.zoom = 1
    }

<style lang="less" scoped>
  // 打印媒体查询
  @media print {
    @page{
      size: landscape!important;
      /*size: auto!important;*/
      margin: 3mm!important; // 去掉页眉页脚
      /*margin-top: 1mm;*/
      /*margin-bottom: 1mm;*/
    }
    body,html {
      margin: 0!important;
      border: 1px solid white!important;
      height: auto!important;  // 在实际页面中高度不够部分内容隐藏了
    }
  }
.print {
  background: #fff;
  color: #333333;
  &-btn {
    position: fixed;
    left: 20px;
    top: 20px;
    z-index: 10;
  }
  &-content {
    /*height: 1116.52px;*/
    /*width: 793.701px;*/
    width: 1200px;
    margin: 0 auto;
    &-title {
      padding: 20px 90px;
      h2 {
        font-size: 20px;
        text-align: center;
      }
      .time-page {
        margin-top: 10px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 14px;
      }
    }
    &-group {
      background-color: #ffffff;
      margin-top: 10px;
      padding-bottom: 10px;
      &:first-child {
        margin-top: 0;
      }
    }
    &-table {
      padding: 5px 20px 10px;
      .table-wrap {
        table {
          margin: 0 auto;
          border: 1px solid #ececec;
          border-collapse: collapse; /*作用：为表格设置合并边框模型；*/
          width: 700px;
          line-height: 21px;
          table-layout: fixed;
          font-size: 10pt;
          font-weight: normal;
          tr {
            page-break-inside: avoid;
            page-break-after: auto;
          }
          th {
            border: 1px solid #000000;
            width: 100px;
            font-weight: bold;
            text-align: left;
          }
          td {
            overflow: hidden;
            word-break: break-all;
            overflow-wrap: break-word;
            border: 1px solid #000000;
            padding: 0 2px;
          }
        }
      }
    }
    &-time {
      font-weight: bold;
      padding: 5px 90px;
    }
  }
}
</style>

print.js文件

// 打印类属性、方法定义
/* eslint-disable */
const Print = function (dom, options) {
  if (!(this instanceof Print)) return new Print(dom, options);

  this.options = this.extend({
    'noPrint': '.no-print'
  }, options);

  if ((typeof dom) === "string") {
    this.dom = document.querySelector(dom);
  } else {
    this.isDOM(dom)
    this.dom = this.isDOM(dom) ? dom : dom.$el;
  }

  this.init();
};
Print.prototype = {
  init: function () {
    var content = this.getStyle() + this.getHtml();
    this.writeIframe(content);
  },
  extend: function (obj, obj2) {
    for (var k in obj2) {
      obj[k] = obj2[k];
    }
    return obj;
  },

  getStyle: function () {
    var str = "",
      styles = document.querySelectorAll('style,link');
    for (var i = 0; i < styles.length; i++) {
      str += styles[i].outerHTML;
    }
    str += "<style>" + (this.options.noPrint ? this.options.noPrint : '.no-print') + "{display:none;}</style>";
    /*@@备注！！添加此行可以多页自动分页*/
    str += "<style>html,body,div{height: auto!important;font-size:14px}</style>";
    return str;
  },

  getHtml: function () {
    var inputs = document.querySelectorAll('input');
    var textareas = document.querySelectorAll('textarea');
    var selects = document.querySelectorAll('select');

    for (var k = 0; k < inputs.length; k++) {
      if (inputs[k].type == "checkbox" || inputs[k].type == "radio") {
        if (inputs[k].checked == true) {
          inputs[k].setAttribute('checked', "checked")
        } else {
          inputs[k].removeAttribute('checked')
        }
      } else if (inputs[k].type == "text") {
        inputs[k].setAttribute('value', inputs[k].value)
      } else {
        inputs[k].setAttribute('value', inputs[k].value)
      }
    }

    for (var k2 = 0; k2 < textareas.length; k2++) {
      if (textareas[k2].type == 'textarea') {
        textareas[k2].innerHTML = textareas[k2].value
      }
    }

    for (var k3 = 0; k3 < selects.length; k3++) {
      if (selects[k3].type == 'select-one') {
        var child = selects[k3].children;
        for (var i in child) {
          if (child[i].tagName == 'OPTION') {
            if (child[i].selected == true) {
              child[i].setAttribute('selected', "selected")
            } else {
              child[i].removeAttribute('selected')
            }
          }
        }
      }
    }
    // 包裹要打印的元素
    // fix: https://github.com/xyl66/vuePlugs_printjs/issues/36
    let outerHTML = this.wrapperRefDom(this.dom).outerHTML
    return outerHTML;
  },
  // 向父级元素循环，包裹当前需要打印的元素
  // 防止根级别开头的 css 选择器不生效
  wrapperRefDom: function (refDom) {
    let prevDom = null
    let currDom = refDom
    // 判断当前元素是否在 body 中，不在文档中则直接返回该节点
    if (!this.isInBody(currDom)) return currDom

    while (currDom) {
      if (prevDom) {
        let element = currDom.cloneNode(false)
        element.appendChild(prevDom)
        prevDom = element
      } else {
        prevDom = currDom.cloneNode(true)
      }

      currDom = currDom.parentElement
    }

    return prevDom
  },

  writeIframe: function (content) {
    var w, doc, iframe = document.createElement('iframe'),
      f = document.body.appendChild(iframe);
    iframe.id = "myIframe";
    //iframe.style = "position:absolute;width:0;height:0;top:-10px;left:-10px;";
    iframe.setAttribute('style', 'position:absolute;width:0;height:0;top:-10px;left:-10px;');
    w = f.contentWindow || f.contentDocument;
    doc = f.contentDocument || f.contentWindow.document;
    doc.open();
    doc.write(content);
    doc.close();
    var _this = this
    iframe.onload = function () {
      _this.toPrint(w);
      setTimeout(function () {
        document.body.removeChild(iframe)
      }, 100)
    }
  },

  toPrint: function (frameWindow) {
    try {
      setTimeout(function () {
        frameWindow.focus();
        try {
          if (!frameWindow.document.execCommand('print', false, null)) {
            frameWindow.print();
          }
        } catch (e) {
          frameWindow.print();
        }
        frameWindow.close();
      }, 10);
    } catch (err) {
      console.log('err', err);
    }
  },
  // 检查一个元素是否是 body 元素的后代元素且非 body 元素本身
  isInBody: function (node) {
    return (node === document.body) ? false : document.body.contains(node);
  },
  isDOM: (typeof HTMLElement === 'object') ?
    function (obj) {
      return obj instanceof HTMLElement;
    } :
    function (obj) {
      return obj && typeof obj === 'object' && obj.nodeType === 1 && typeof obj.nodeName === 'string';
    }
};
const MyPlugin = {}
MyPlugin.install = function (Vue, options) {
  // 4. 添加实例方法
  Vue.prototype.$print = Print
}
export default MyPlugin