使用jsPDF從Iframe內容下載PDF文件

Question

我想保存包含IFrame內容的PDF文件。我使用jsPDF Javascript庫。

這裏是我的代碼至今：

function toPDF(){  
     var pdf = new jsPDF('p', 'in', 'letter'); 

    // source can be HTML-formatted string, or a reference 
    // to an actual DOM element from which the text will be scraped. 
    source = $('#iframeid')[0] 

    // we support special element handlers. Register them with jQuery-style 
    // ID selector for either ID or node name. ("#iAmID", "div", "span" etc.) 
    // There is no support for any other type of selectors 
    // (class, of compound) at this time. 
    specialElementHandlers = { 
     // element with id of "bypass" - jQuery style selector 
     '#emptyid': function(element, renderer){ 
      // true = "handled elsewhere, bypass text extraction" 
      return true 
     } 
    } 

    // all coords and widths are in jsPDF instance's declared units 
    // 'inches' in this case 
    pdf.fromHTML(
     source // HTML string or DOM elem ref. 
     , 0.5 // x coord 
     , 0.5 // y coord 
     , { 
      'width':7.5 // max width of content on PDF 
      ,'elementHandlers': specialElementHandlers 
     } 
    ) 

    pdf.save('Test.pdf'); 
} 

當我嘗試此我成爲了這個錯誤在Chrome：

Uncaught TypeError: Cannot read property 'widths' of undefined

可能是什麼問題？

Answer 1

添加jspdf.plugin.standard_fonts_metrics.js。