How to use innerHTML to display text

Question

How to use innerHTML to display text

7.6k views Asked by pantawat homdejanakul At 24 November 2024 at 07:30

for example if i want to display text from javascript side by side like this

text1 text2 text3

so I typed this code

<p id=displayText> <p>
<script type="text/javascript">
function doSomeThing()
{
  //do something
  document.getElementById("displayText").innerHTML=text1;
  //do something
  document.getElementById("displayText").innerHTML=text2;
  //do something
  document.getElementById("displayText").innerHTML=text3;
}
</script>

I got only

text3

how can I do it.

Original Q&A

There are 4 answers

**3pic** · Answer 1 · 2015-06-08 12:25:49

you set the texts to the same ID. Create 3 ids, not only one.

do this or that :

function doSomeThing()
{
    //do something
    document.getElementById("displayText").innerHTML = text1;
    //do something
    document.getElementById("displayText").innerHTML += (" "+text2);
    //do something
    document.getElementById("displayText").innerHTML += (" "+text3);
}


function doSomeThing()
{
    //do something
    document.getElementById("displayText1").innerHTML = text1;
    //do something
    document.getElementById("displayText2").innerHTML = text2;
    //do something
    document.getElementById("displayText3").innerHTML = text3;
}

//HTML ?
<span id="displayText1"></span>
<span id="displayText2"></span>
<span id="displayText3"></span>

**Halcyon** · Answer 2 · 2015-06-08 12:29:09

+= can be problematic when used with the non-standard property innerHTML.

You can avoid using += on innerHTML by using an extra variable:

function doSomeThing()
{
    var progress = "";
    //do something
    progress += text1;
    document.getElementById("displayText").innerHTML = progress;
    //do something
    progress += text2;
    document.getElementById("displayText").innerHTML = progress;
    //do something
    progress += text3;
    document.getElementById("displayText").innerHTML = progress;
}

+= is problematic if you do:

e.innerHTML += '<a href="#">foo';
e.innerHTML += 'bar';
e.innerHTML += '</a>';

The actual output HTML will be <a href="#">foo</a>bar. How did that happen? Well, when you set the innerHTML to <a href="#">foo the browser will try to 'fix' it for you so it adds the </a> to make it valid.

There are also ways to avoid using innerHTML entirely by using the DOM API proper document.createElement()/createTextNode() etc.

**Lain** · Answer 3 · 2015-06-08 12:32:12

Merely seach for the element once and also pass the values as array (more dynamic and less limited).

<html>
    <head>
        <script>
            function doSomeThing(v){
                var tE = document.getElementById('displayText');
                if (tE) tE.innerHTML = (v || []).join(' ');
            }
        </script>
    </head>

    <body onload = "doSomeThing(['text1', 'text2', 'text3'])">
        <span id = 'displayText'></span>
    </body>
</html>

**Harshad Vekariya** · Answer 4 · 2015-06-08 12:40:40

<p id=displayText> <p>
<script type="text/javascript">
    function doSomeThing()
    {
      var para = document.getElementById('displayText');
      para.innerHTML = para.innerHTML + text1;
      para.innerHTML = para.innerHTML + text2;
      para.innerHTML = para.innerHTML + text3;
    }
</script>

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How to use innerHTML to display text

There are 4 answers

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