JavaScript to Print Contents of Only Specific <Div>

Print the contents of a DIV

Slight changes over earlier version - tested on CHROME

function PrintElem(elem)
{
    var mywindow = window.open('', 'PRINT', 'height=400,width=600');

    mywindow.document.write('<html><head><title>' + document.title  + '</title>');
    mywindow.document.write('</head><body >');
    mywindow.document.write('<h1>' + document.title  + '</h1>');
    mywindow.document.write(document.getElementById(elem).innerHTML);
    mywindow.document.write('</body></html>');

    mywindow.document.close(); // necessary for IE >= 10
    mywindow.focus(); // necessary for IE >= 10*/

    mywindow.print();
    mywindow.close();

    return true;
}

Print div id=printarea/div only?

Here is a general solution, using CSS only, which I have verified to work.

@media print {
  body * {
    visibility: hidden;
  }
  #section-to-print, #section-to-print * {
    visibility: visible;
  }
  #section-to-print {
    position: absolute;
    left: 0;
    top: 0;
  }
}

Alternative approaches aren't so good. Using display is tricky because if any element has display:none then none of its descendants will display either. To use it, you have to change the structure of your page.

Using visibility works better since you can turn on visibility for descendants. The invisible elements still affect the layout though, so I move section-to-print to the top left so it prints properly.

I want to print only the specific div content and email results from HTML/JS page?

You need to use actual div .final-results in the CSS / @media print{} to show the results tables only in the window.print() command when you click on Print to PDF

Also, you can add the custom CSS to your PDF as your wish to

Edit: I have added querySelector method to add the innerText of your .final-results div in to href of so you can use that for emailing as well by clicking send to Email

Live Demo:

function displayRadioValue() {
  let section1 = document.querySelectorAll('.section-1 > input[type="radio"]')
  let section2 = document.querySelectorAll('.section-2 > input[type="radio"]')
  let section1Total = 0
  let section2Total = 0
  let section1Question = 0
  let section2Question = 0
  let finalResults = document.querySelector('.final-results')
  let result1 = ''
  let result2 = ''
  finalResults.innerHTML = ''

  //Section 1
  section1.forEach(function(radio, index) {
    if (radio.checked) {
      section2Question++
      section1Total += +radio.value
    }
  })

  //Section 2
  section2.forEach(function(radio, index) {
    if (radio.checked) {
      section1Question++
      section2Total += +radio.value
    }
  })

  //Final Results and validation
  if (section1Total > 0 && section2Total > 0) {
    finalResults.innerHTML += genTable(section1Question, section1Total, 1)
    finalResults.innerHTML += genTable(section2Question, section2Total, 2)
    document.getElementById("control").style.display = "block";
    document.getElementById("toemail").href += document.querySelector(".final-results").innerText;
  } else {
    finalResults.innerHTML = 'Snap! Please select the atleast one survey question from each section '
  }
}

function genTable(ques, total, section) {
  var result = "<b>Section " + section + ":</b><br>"
  var tr = "<tr><th>" + total + "</th><th>" + ((total / (ques * 3)) * 100).toFixed(2) + "</th></tr>"
  result += "<table><thead><tr><th>Total Score</th><th>Percentage</th></tr></thead><tbody>" + tr + "</tbody></table>"
  return result
}

@media print {
  body * {
    visibility: hidden;
  }
  .final-results * {
    visibility: visible;
  }
  .final-results {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
  }
}

table,
table tr th,
table tr td {
  border: 1px solid black;
}

<p>
  Select a radio button and click on Submit.
</p>
<div class="section-1">

  <h2>Section 1</h2>
  question 1:
  <input type="radio" name="question1" value="1">1
  <input type="radio" name="question1" value="2">2
  <input type="radio" name="question1" value="3">3

  <br> question 2:
  <input type="radio" name="question2" value="1">1
  <input type="radio" name="question2" value="2">2
  <input type="radio" name="question2" value="3">3

  <br> question 3:
  <input type="radio" name="question3" value="1">1
  <input type="radio" name="question3" value="2">2
  <input type="radio" name="question3" value="3">3

</div>
<div class="section-2">

  <h2>Section 2</h2>
  question 1:
  <input type="radio" name="question4" value="1">1
  <input type="radio" name="question4" value="2">2
  <input type="radio" name="question4" value="3">3

  <br> question 2:
  <input type="radio" name="question5" value="1">1
  <input type="radio" name="question5" value="2">2
  <input type="radio" name="question5" value="3">3
  <br> question 3:
  <input type="radio" name="question6" value="1">1
  <input type="radio" name="question6" value="2">2
  <input type="radio" name="question6" value="3">3
  <br> question 4:
  <input type="radio" name="question7" value="1">1
  <input type="radio" name="question7" value="2">2
  <input type="radio" name="question7" value="3">3
</div>
<br>

<div class="final-results"></div>
<br>

<button type="button" onclick="displayRadioValue()">
  Submit
</button>

<div id="control" style="display: none"><a id="toemail" href="mailto:youremail@domain.com?subject=Survey response&body=">Send to
    email</a> <button onclick="window.print();">Send to PDF</button></div>

How to print an specific DIV with its CSS

You can select all other elements and hide them from the page (excluding the target with the use of the :not() CSS pseudo class), then call window.print() to print the page:

btn.addEventListener('click', function(){
  document.body.querySelectorAll(':not(.red)').forEach(e => e.style.display = "none");
  window.print();
})

div{
  height:100px;
  border:1px solid;
}
.red{
  background-color:red;
}
.blue{
  background-color:blue;
}

<div class="red">
red
</div>
<div class="blue">
blue
</div>
<button id="btn">Print Red div</button>

how to show the contents of a div only in the print file?

You can use css @media print

This will hide all body elements and show only the div #printThis and all its children.

@media print {
    body * {
        visibility: hidden;
    }

    #printThis,  #printThis * {
        visibility: visible;
    }

    #printThis {
        width : 100%;
        height : auto;
        position: absolute;
        left: 0;
        top: 0;
    }
}

js (No need to modify/hide elements. CSS will handle it)

function printDiv( printThis ) {
    window.print();
}

HTML:

<div id="printThis">
    content
</div>
<input type="button" onclick="printDiv('printThis')" value="PRINT" />

print content of a div except some element in it, doesnt work

Actually the newly created window using window.open does not have any style attached to it.

Here is a snapshot

Snapshot of the newly created window

Style can be added to it by adding inline style in the following code

printWindow.document.write('<html><head><style media="print">' +
            'p {color: green;}.noprint {display: none !important;}</style><title>DIV Contents</title>');