Tryit Editor v2.9

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<!DOCTYPE html>
<html>
<head>
<style>
p  {
    border-style: solid;
    border-left-width: 15px;
}
</style>
</head>
<body>

<p><b>Note:</b> The "border-left-width" property does not work if it is used alone. Use the "border-style" property to set the borders first.</p>

</body>
</html>