What is an HTML <iframe> tag ?
HTML iframe is used to display a web page within a web page.
Its also called as nested webpage display process.
HTML <iframe> tag specifies an inline frame.
Why we use HTML <iframe> tag ?
HTML iframes are used to embed another document within the current HTML document.
Both web page content and iframe contents can interact with each other using JavaScript.
How HTML <iframe> tag works ?
When <iframe> tag is declared with “src” attribute, A rectangular within the document is opened and source URL is loaded inside the iframe.
The iframe window will be treated as the new HTML document by the browser with scrollbars and borders.
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Syntax :
<iframe src="sourceURL"></iframe>
1. Simple HTML Iframe
Example :
Example :
<!DOCTYPE html>
<html>
<head>
<title>IFrame</title>
</head>
<body>
<p>Simple IFrame Example</p>
<iframe src="https://s30.e0b.myftpupload.com/" title="cstechbook"></iframe>
</body>
</html>
Output :
![This image has an empty alt attribute; its file name is html-23-example1-cc.png](https://s30.e0b.myftpupload.com/wp-content/uploads/2020/10/html-23-example1-cc.png)
2. IFrame with Width and Height
Example :
<!DOCTYPE html>
<html>
<head>
<title>IFrame</title>
</head>
<body>
<p>Simple IFrame Example</p>
<iframe src="https://s30.e0b.myftpupload.com/" title="cstechbook" height="300px" width="300px"></iframe>
</body>
</html>
Output :
![This image has an empty alt attribute; its file name is html-23-example2-cc-1024x894.png](https://s30.e0b.myftpupload.com/wp-content/uploads/2020/10/html-23-example2-cc-1024x894.png)
3. IFrame Width and Height in percentage.
Example :
<!DOCTYPE html>
<html>
<head>
<title>IFrame</title>
</head>
<body>
<p>Simple IFrame Example</p>
<iframe src="https://s30.e0b.myftpupload.com/" title="cstechbook" height="30%" width="30%"></iframe>
</body>
</html>
Output :
![This image has an empty alt attribute; its file name is html-23-example3-cc-1024x629.png](https://s30.e0b.myftpupload.com/wp-content/uploads/2020/10/html-23-example3-cc-1024x629.png)
4. IFrame Width and Height modified using CSS property.
Example :
<!DOCTYPE html>
<html>
<head>
<title>IFrame</title>
</head>
<body>
<p>Simple IFrame Example</p>
<iframe src="https://s30.e0b.myftpupload.com/" title="cstechbook" style="height:300px;width:300px"></iframe>
</body>
</html>
Output :
![This image has an empty alt attribute; its file name is html-23-example4-cc-1024x933.png](https://s30.e0b.myftpupload.com/wp-content/uploads/2020/10/html-23-example4-cc-1024x933.png)
5. IFrame without border
Example :
<!DOCTYPE html>
<html>
<head>
<title>IFrame</title>
</head>
<body>
<p>Simple IFrame Example</p>
<iframe src="https://s30.e0b.myftpupload.com/" title="cstechbook" style="border:none;height:300px;width:300px"></iframe>
</body>
</html>
Output :
![This image has an empty alt attribute; its file name is html-23-example5-cc-1024x895.png](https://s30.e0b.myftpupload.com/wp-content/uploads/2020/10/html-23-example5-cc-1024x895.png)
6. IFrame with border
Example :
<!DOCTYPE html>
<html>
<head>
<title>IFrame</title>
</head>
<body>
<p>Simple IFrame Example</p>
<iframe src="https://s30.e0b.myftpupload.com/" title="cstechbook" style="border:2px solid orange;height:300px;width:300px"></iframe>
</body>
</html>
Output :
![This image has an empty alt attribute; its file name is html-23-example6-cc-1024x869.png](https://s30.e0b.myftpupload.com/wp-content/uploads/2020/10/html-23-example6-cc-1024x869.png)
7. IFrame with Target link.
Example :
<!DOCTYPE html>
<html>
<head>
<title>IFrame</title>
</head>
<body>
<p>Simple IFrame Example</p>
<iframe src="text.html" title="google" name="cstechbook" style="border:2px solid orange;height:300px;width:300px"></iframe>
<p><a href="https://s30.e0b.myftpupload.com/" target="cstechbook">CSTechbook.com</a></p>
</body>
</html>
Output :
![This image has an empty alt attribute; its file name is html-23-example7-cc.png](https://s30.e0b.myftpupload.com/wp-content/uploads/2020/10/html-23-example7-cc.png)
<iframe> Tag Attributes
HTML <iframe> tag support following specific attributes.
Sno | Attributes | Value | Description |
---|---|---|---|
1 | height | pixels | Specify the height of the inline frame. |
2 | name | text | Specify the name of the inline frame. |
3 | sandbox | allow-forms allow-pointer-lock allow-popups allow-same-origin allow-scripts allow-top-navigation | This attribute enable extra restrictions on the content that can appear in the inline frame. allow-forms Its allows to embedded browsing context to submit forms. allow-pointer-lock Its allows to embedded browsing context to use Pointer Lock API. allow-popups Its allows popups window. allow-same-origin Its allows to embedded content consider as normal origin instead of unique origin. allow-scripts Its allows to embedded browsing context to execute scripts. allow-top-navigation Its allows to embedded browsing context load content to the top level browsing context. |
4 | src | url | Specify the URL of the page to embed on the inline frame. |
5 | width | pixels | Specify the width of the inline frame. |
6 | Following attributes has been removed in HTML5. | ||
7 | align | left right top middle bottom | Specify the alignment of an iframe. |
8 | frameborder | 1 0 | Specify that border should be display or not. |
9 | longdesc | URL | Specify a page (that contains a long description) of the content of an iframe. |
10 | marginheight | pixels | Specify the top and bottom margins of an iframe. |
11 | marginwidth | pixels | Specify the left and right margins of an iframe. |
12 | scrolling | auto yes no | Specify that scrollbars should be display or not. |
13 | allowfullscreen | allowfullscreen | Specify that iframe content allow to use on full screen. |
Global Attributes
HTML <iframe> tag support following global attributes.
Sno | Attributes | Value | Description |
---|---|---|---|
1 | id | unique_name | Declared unique id for an element. |
2 | class | class_name | Declared one or more classnames for an element. |
3 | style | styles | CSS inline styles specify an element. |
4 | title | title | Specify extra details of element contain, this will display as a “tooltip” for an elements. |
Event Attributes
HTML <iframe> tag support following event attributes.
Sno | Attributes | Value | Description |
---|---|---|---|
1 | onfocus | script | element gets focus on object when script tobe run. |
2 | onblur | script | element lose the focus on object when scrip tobe run. |
3 | onabort | script | element gets aborted on object when script tobe run. |
4 | onchange | script | element gets anytime change on object when script tobe run. |
5 | onbeforeunload | script | element gets unloaded on object when scrip tobe run. |
6 | onclick | script | clicked on object when script tobe run. |
7 | ondblclick | script | double click on object when script tobe run. |
8 | onkeydown | script | key is pressed when script tobe run. |
9 | onkeypress | script | key is pressed over element then released when script tobe run. |
10 | onkeyup | script | key is released over element when script tobe run. |
11 | onmousedown | script | mouse button was pressed over an element when script tobe run. |
12 | onmouseout | script | mouse pointer release over an element when script tobe run. |
13 | onmousemove | script | run mouse pointer moved when script tobe run. |
14 | onmouseover | script | run mouse pointer move over when script tobe run. |
15 | onmouseup | script | mouse button is released when script tobe run. |
16 | onreset | script | form has been reset when script tobe run. |
17 | onselect | script | Select some content when script tobe run. |
18 | onsubmit | script | form has been submitted when script tobe run. |
19 | onload | script | object has load when script tobe run. |
20 | onchange | script | allow to change the object when script tobe run. |
21 | onunload | script | unload to the browser window when script tobe run. |
22 | ondrag | script | element being dragged when script tobe run. |
23 | ondragend | script | element being stop dragged when script tobe run. |
24 | ondragenter | script | element being go target dragged when script tobe run. |
25 | ondragleave | script | element being leave to target dragged when script tobe run. |
26 | ondragover | script | element being over to target dragged when script tobe run. |
27 | ondragstart | script | element being start dragged when script tobe run. |
28 | ondrop | script | element being dropped when script tobe run. |
29 | onerror | script | element error occurs when script tobe run. |
30 | onmessage | script | element message display when script tobe run. |
31 | onerror | script | element error occurs when script tobe run. |
32 | onmousewheel | script | mouse wheel will be rotate when script tobe run. |
33 | onscroll | script | scrollbar is scroll when script tobe run. |
34 | onresize | script | element should be resize when script tobe run. |
35 | onselect | script | all element content selected when script tobe run. |
36 | onstorage | script | element should be store in target when script tobe run. |
Browser Compatibility
Sno | Browser | Support |
1 | Chrome | Yes |
2 | Firefox | Yes |
3 | Edge | Yes |
4 | Opera | Yes |
5 | Safari | Yes |
6 | Internet Explorer | Yes |