设置 title 属性为 Javascript function

Question

I am trying to find, if I can pass a value on the title attribute of a label element using Javascript?

I have tried the following Javascript code:

function myFunction()
{
    return "Hello!";
}

And a piece of HTML code:

<label title="myFunction()">TEST</label>

But, this isn't working. It just show the 'myFunction()' as a text.

Is it possible, what I am trying to do? If yes, what is the correct syntax?

Answer 1

<label id='mylabel'>TEST</label>
<script>
    function myFunction() {
        return "Hello!";
    }

    document.getElementById('mylabel').setAttribute('title', myFunction());
</script>

Should do the job. It first selects the label and then sets the attribute.

Answer 2

You can't inline javascript like this.

What you may do is

1) give an id to your label and put this at the end of your body

<script>
   document.getElementById('myId').title = myFunction();
</script>

Demonstration

2) if you really want to inline the call, write this at the point where you want your label :

<script>
     document.write('<label title="'+myFunction()+'">TEST</label>');
</script>

(this is really not recommended)

Answer 3

Try this way:-

HTML:

<label id="lab">TEST</label>​

JS:

window.onload = function() {
    document.getElementById('lab').setAttribute('title','mytitle');
    alert(document.getElementById('lab').title);
}​

Refer LIVE DEMO

Answer 4

I got this! If you are using angular you can use this data Binding and call the function

<label title="{{myFunction()}}">TEST</label>