CSS Properties: How to align item with JavaScript?

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HTML Code:

<!DOCTYPE html>
<meta charset="utf-8">
<title>How to align item with JavaScript</title>
div#xyz {
width: 200px;
height: 250px;
border: 1px solid black; 
display: -webkit-flex; /* Safari */
-webkit-align-items: center; /* Safari 7.0+ */
display: flex;
   align-items: center;
div#xyz div {
   -webkit-flex: 1; /* Safari 6.1+ */
   flex: 1;
<div id="xyz">
<div style="background-color:#99FF99;">Item1</div>
<div style="background-color:#33CCFF;">Item2  with more content.</div>  
<div style="background-color:#FF99FF;">Item3</div>
<p>Click the "Try it" button to set the value of the alignItems property to "flex-start"</p>
<button onclick="w3r()">Try it</button>
function w3r() {
document.getElementById("xyz").style.WebkitAlignItems = "flex-start"; // Code for Safari 7.0+
document.getElementById("xyz").style.alignItems = "flex-start";

Live Demo:

See the Pen align-item-javascript-syntax-answer by w3resource (@w3resource) on CodePen.

See the solution in the browser

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