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<html><head><style> #myDIV { background-color: lightblue;}</style></head><body><h1>Change max-width with JavaScript</h1><p>Click the "Try it" button to make sure that the DIV element's width never exceeds 600 pixels:</p><button onclick="myFunction()">Try it</button><div id="myDIV"> <p>This DIV element does not have a pre-defined width.</p> <p>The width of this DIV element is as wide as the parent element allows it to be (100%).</p> <p>Try resizing the browser window to see that width of this DIV element will grow/shrink along width the resizing.</p> <p>But if you click the "Try it" button, yo will make sure that this DIV element does not exceed 600 pixels in width.</p></div><script>function myFunction() { document.getElementById("myDIV").style.maxWidth = "600px";}</script></body><!-- Mirrored from www.w3schools.com/cssref/tryit.asp?filename=trycss_js_max-width by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:01:20 GMT --></html>