Question

How to append a HTML string such as

var str = '<p>Just some <span>text</span> here</p>';

to the <div> with the id test?

(Btw div.innerHTML += str; is not acceptable.)

Answer 1

Use insertAdjacentHTML which is supported in all current browsers:

div.insertAdjacentHTML( 'beforeend', str );

The position parameter beforeend will add inside the element, after its last child.

Live demo: http://jsfiddle.net/euQ5n/