Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <style> div { display:-moz-box; /* Firefox */ display:-webkit-box; /* Safari and Chrome */ display:-ms-flexbox; /* Internet Explorer 10 */ display:box; width:300px; border:1px solid black; } #p1 { -moz-box-flex:1.0; /* Firefox */ -webkit-box-flex:1.0; /* Safari and Chrome */ -ms-flex:1.0; /* Internet Explorer 10 */ box-flex:1.0; border:1px solid red; } #p2 { -moz-box-flex:2.0; /* Firefox */ -webkit-box-flex:2.0; /* Safari and Chrome */ -ms-flex:2.0; /* Internet Explorer 10 */ box-flex:2.0; border:1px solid blue; } </style> </head> <body> <div> <p id="p1">Hello</p> <p id="p2">W3Schools</p> </div> <p><b>Note:</b> Flexible boxes are not supported in IE 9, and earlier versions.</p> </body> </html>
Result:
W3Schools.com - Try it yourself