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Javascript Comments

To add annotations, hints, or exclude some code from being executed JavaScript provides two ways of commenting code lines.

Single line Comment //

Everything after the // until the end of the line is excluded from execution.

function elementAt( event ) {
 // Gets the element from Event coordinates
 return document.elementFromPoint(event.clientX, event.clientY);

Multi-line Comment /**/

Everything between the opening /* and the closing */ is excluded from execution, even if the opening and closing
are on different lines.

 Gets the element from Event coordinates.
 Use like:
 var clickedEl = someEl.addEventListener("click", elementAt, false);
function elementAt( event ) {
 return document.elementFromPoint(event.clientX, event.clientY);
/* TODO: write more useful comments! */


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