The HTML DOM borderLeft property is used as a shorthand for getting or setting the left border properties for an element. The borderLeft property contains border-left-width, border-left-style, border-left-color.
Following is the syntax for −
Setting the borderImageWidth property −
object.style.borderLeft = "width style color|initial|inherit"
The above properties are explained as follows −
Parameter | Description |
---|---|
width | For setting the left border width. |
style | For setting the left border style. |
color | For setting the left border color. |
initial | For setting this property to default value. |
initial | For setting this property to default value. |
inherit | To inherit the parent property value. |
Let us look at an example for the borderLeft property −
Example
<!DOCTYPE html> <html> <head> <style> #P1 { border-left: 4px solid magenta; font-size: 1.5rem; } </style> <script> function changeBorderLeft(){ document.getElementById("P1").style.borderLeft="9px dashed red"; document.getElementById("Sample").innerHTML="The left 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 left border properties by clicking the below button</p> <button onclick="changeBorderLeft()">Change Border Left</button> <p id="Sample"></p> </body> </html>
Output
On clicking the “Change Border Left” 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-left: 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 Left” that will execute the changeBorderLeft() function on being clicked by the user.
<button onclick="changeBorderLeft()">Change Border Left</button>
The changeBorderLeft() function gets the borderLeft 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 changeBorderLeft(){ document.getElementById("P1").style.borderLeft="9px dashed red"; document.getElementById("Sample").innerHTML="The left border for the paragraph element is now changed"; }