Access elements from one HTML page on another HTML page

Question

Access elements from one HTML page on another HTML page

In my web project, there are two HTML files - one is named main.html and the other is called child.html. The main.html file contains an iframe element with the id of "myFrame" that displays the content of the child.html page. Both pages have a button labeled "Hide frame". When this button is clicked, it triggers the hideFrame() JavaScript function which can be found in the main.js file. This function simply changes the display property of the myFrame element to "none".

function hideFrame(){
    document.getElementById("myFrame").style.display = "none";
}

When the button within the main.html file is clicked, the hideFrame() function works as intended and hides the frame. However, trying to call the same function from the child.html page does not work.

The challenge now is figuring out how to access the myFrame element from the child.html page.

javascript html css iframe

Answer 1

Answer №1

To ensure the function is accessible globally, utilize the main.html's window object for assignment. Instead of

function hideFrame(){
    document.getElementById("myFrame").style.display = "none";
}

You should modify it to something like this:

window.hideFrame = function(){
    document.getElementById("myFrame").style.display = "none";
}

By doing this, the function will have global scope on the main.html's window.

The child frame possesses its own window object. To invoke the function from child.html, you must access the parent window object.

In main.html, you can simply call hideFrame on click onclick = hideFrame(), but in child.html, use

onclick = window.parent.hideFrame()

Answer 2

To ensure the function is accessible globally, utilize the main.html's window object for assignment. Instead of

function hideFrame(){
    document.getElementById("myFrame").style.display = "none";
}

You should modify it to something like this:

window.hideFrame = function(){
    document.getElementById("myFrame").style.display = "none";
}

By doing this, the function will have global scope on the main.html's window.

The child frame possesses its own window object. To invoke the function from child.html, you must access the parent window object.

In main.html, you can simply call hideFrame on click onclick = hideFrame(), but in child.html, use

onclick = window.parent.hideFrame()

Answer 3

Answer №2

To avoid using an iFrame, a better approach would be to utilize jquery for loading segments of HTML content from external files.

If this option is not viable, another method could involve injecting Javascript code into the child frame that accesses elements in the parent frame. For example:

child frame:

<script>
    var x;
</script>

parent frame:

<script>
    $("#myFrame").x = function(){
        functionality / reference definitions
    }
</script>

Answer 4

To avoid using an iFrame, a better approach would be to utilize jquery for loading segments of HTML content from external files.

If this option is not viable, another method could involve injecting Javascript code into the child frame that accesses elements in the parent frame. For example:

child frame:

<script>
    var x;
</script>

parent frame:

<script>
    $("#myFrame").x = function(){
        functionality / reference definitions
    }
</script>

Answer 5

Answer №3

It took me some time to grasp the concept of what you were trying to convey. As I understand it, you are looking to access an element on the main window from within an iframe. To achieve this, you can use the following code snippet:

var _parent = window.parent,
    _parent_elem = _parent.document;

Next, to access a specific element from the parent page (such as #myFrame):

var my_frame = _parent_elem.getElementById("myFrame");

Answer 6

It took me some time to grasp the concept of what you were trying to convey. As I understand it, you are looking to access an element on the main window from within an iframe. To achieve this, you can use the following code snippet:

var _parent = window.parent,
    _parent_elem = _parent.document;

Next, to access a specific element from the parent page (such as #myFrame):

var my_frame = _parent_elem.getElementById("myFrame");

Access elements from one HTML page on another HTML page

Answer №1

Answer №2

Answer №3

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