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HTML DOM Style borderTop Property
The HTML DOM borderTop property is used as a shorthand for getting or setting the Top border properties for an element. The borderTop property contains border-Top-width, border-Top-style, border-Top-color.
Following is the syntax for −
Setting the borderTop property:
object.style.borderTop = "width style color|initial|inherit"
The above properties are explained as follows −
| Parameter | Description |
|---|---|
| width | For setting the Top border width. |
| style | For setting the Top border style. |
| color | For setting the Top border color. |
| initial | For setting this property to default value. |
| inherit | To inherit the parent property value. |
Let us look at an example for the borderTop property −
Example
<!DOCTYPE html>
<html>
<head>
<style>
#P1 {
border-Top: 4px solid magenta;
font-size: 1.5rem;
}
</style>
<script>
function changeBorderTop(){
document.getElementById("P1").style.borderTop="9px dashed red";
document.getElementById("Sample").innerHTML="The Top border for the paragraph element is now changed ";
}
</script>
</head>
<body>
<p id="P1">This is some sample text inside the paragraph. Here is another line of this sample text</p>
<p>Change the above paragraph Top border properties by clicking the below button</p>
<button onclick="changeBorderTop()">Change Border Top</button>
<p id="Sample"></p>
</body>
</html>Output
On clicking the “Change Border Top” button −
In the above example −
We have first created a paragraph with id “P1” that contains some text inside it and a corresponding css style applied to it.
#P1 {
border-Top: 4px solid magenta;
font-size: 1.5rem;
}
<p id="P1">This is some sample text inside the paragraph. Here is another line of this sample text</p>We then created a button “Change Border Top” that will execute the changeBorderTop() function on being clicked by the user.
<button onclick="changeBorderTop()">Change Border Top</button>
The changeBorderTop() function gets borderTop style property of the paragraph element with id “P1” by using the getElementById() method and changes its property value to ‘9px dashed red’ . A message indicating this change is then displayed in the paragraph with id “Sample” using its innerHTML property −
function changeBorderTop(){
document.getElementById("P1").style.borderTop="9px dashed red";
document.getElementById("Sample").innerHTML="The top border for the paragraph element is now changed";
}
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