Method: 1. Wrap the image with div and span; 2. Use setAttribute() to add "display:table;text-align:center" and "display:table-cell;vertical-align:middle" ;"style.
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
How to center the image using javascript:
Build an HTML framework
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style>
div {
width: 500px;
height: 200px;
border: green solid 1px;
}
</style>
</head>
<body>
<div id="app">
<span id="img">
<img src="img/1.jpg" style="max-width:90%" / alt="How to set the image to center in javascript" >
</span>
</div>
</body>
</html>
Use the setAttribute() method to add an image centering style
var div=document.getElementById("app");
var img=document.getElementById("img");
div.setAttribute("style","display:table;text-align: center;");
img.setAttribute("style","display:table-cell;vertical-align: middle;");
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