HTML frames provide a convenient way to divide the browser window into multiple parts.
Each of these sections can load a separate HTML document. We can use JavaScript to load content into a specific frame, using the frame property of the window object. The Frames property is an array-like object that contains all frames (including iframes) on the current page.
We can use the window.frames[] property in various ways to load the content of the document into a frame. Let's look at them one by one -
1. Using index
To target a specific frame, you can use the index or name of the frame. For example, to target the first frame on the page, you would use the following code -
window.frames[0].document.location.href = "http://www.example.com"
2. Use frame name
To locate a frame using its name, you can use the following method. Assume the name of the frame is "frame_name" -
window.frames["frame_name"].document.location.href = "http://www.example.com";
3. Use getElementById and getElementByName
You can also use the getElementById() or getElementsByName() method to locate the frame, and then use the method contentWindow to access the frame window as follows -
document.getElementById("frame_id").contentWindow.location.href = "http://www.example.com";
document.getElementsByName("frame_name")[0].contentWindow.location.href = "http://www.example.com";
Example
The following is a complete working code snippet containing all these methods -
<!DOCTYPE html>
<html>
<head>
<title>Target a frame</title>
</head>
<body>
<button onclick="indexMethod()">Using Index</button>
<button onclick="nameMethod()">Using Frame Name</button>
<button onclick="queryMethod()">Using Query Methods</button>
<iframe src=""
height="150px"
width="100%"
name="frame_name"
id="frame_id" srcdoc="<html>
<body style='background-color:#ccc;'>
<h1 id="Testing-iframe">Testing iframe</h1>
</body>
</html>">
</iframe>
</body>
<script>
const indexMethod = () => {
const child = document.createElement('p');
child.innerText = 'added inside frame';
window.frames[0].document.body.appendChild(child);
};
const nameMethod = () => {
const child = document.createElement('p');
child.innerText = 'added inside frame';
window.frames["frame_name"].document.body.appendChild(child);
};
const queryMethod = () => {
const child = document.createElement('p');
child.innerText = 'added inside frame';
document.getElementById("frame_id").contentWindow.document.body.appendChild(child);
};
</script>
</html>
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