AsposePdfExtractText

Extract text from a PDF-file.

function AsposePdfExtractText(
    fileBlob,
    fileName 
)

Parameters:

fileBlob Blob object
fileName file name

Return: JSON object

errorCode - code error (0 no error)
errorText - text error ("" no error)
extractText - text from PDF

Web Worker example:

  /*Create Web Worker*/
  const AsposePDFWebWorker = new Worker("AsposePDFforJS.js");
  AsposePDFWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
  AsposePDFWebWorker.onmessage = evt => document.getElementById('output').textContent = 
    (evt.data == 'ready') ? 'loaded!' :
      (evt.data.json.errorCode == 0) ?
        evt.data.json.extractText :
        `Error: ${evt.data.json.errorText}`; 

  /*Event handler*/
  const ffileExtract = e => {
    const file_reader = new FileReader();
    file_reader.onload = event => {
      /*Extract text from a PDF-file - Ask Web Worker*/
      AsposePDFWebWorker.postMessage(
        { "operation": 'AsposePdfExtractText', "params": [event.target.result, e.target.files[0].name] },
        [event.target.result]
      );
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

Simple example:

  var ffileExtract = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      /*Extract text from a PDF-file*/
      const json = AsposePdfExtractText(event.target.result, e.target.files[0].name);
      if (json.errorCode == 0) document.getElementById('output').textContent = json.extractText;
      else document.getElementById('output').textContent = json.errorText;
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };