vue打印组件

Posted 2022-01-27 Jay_帅小伙

// 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() + '<div style="display: flex; align-items: center;flex-flow: column;">'+this.gethtml()+'</div>';
      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>';
      str += '<style>html,body,divheight: 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');
              
            
          
        
      
  
      return this.dom.outerHTML;
    ,
  
    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);
      
    ,
    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;
  

使用this.$print(this.$refs.print);