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The JavaScript Window parent property refers to the parent window or frame of the current window. It is commonly used to access and manipulate the parent window from a child window or frame.

Here are some examples of how the parent property can be used in JavaScript code:

1. To access the parent window from a child window, you can use the following code:

var parent = window.parent;

// you can now access the parent window's properties and methods
parent.document.getElementById('myElement').innerHTML = 'hello';

2. To close the parent window from a child window, you can use the following code:

var parent = window.parent;

// you can now close the parent window
parent.close();

3. To access the parent window’s variables from a child window, you can use the following code:

var parent = window.parent;

// you can now access the parent window's variables
var parentVariable = parent.myVariable;

Overall, the parent property provides a convenient way to access and manipulate the parent window from a child window or frame. It can be used to pass data, execute functions, or perform other tasks on the parent window.