There’s a minor anti-abuse/security argument as well– if a browser tab could blow itself away freely, this might be useful as a part of scareware or other user-experience abuses. The user might’ve been using a tab to explore a set of search results, and if one of those results could blow away both itself and the backstack with the search results page, this would be pretty annoying. While sometimes explained away as nebulous “ Security reasons!“, the core reason is more aligned with simple user-experience- users could lose important state in their browser window or “back/forward” stack (in IE, we called this the TravelLog) if a tab or window went away unexpectedly. Why Do Browsers Limit close()?īefore we dive into what factors govern what happens when close() is called, it’s important to understand why there’s a restriction at all. Scripts may close only the windows that were opened by them. When looking at the Developer Tools console, they’ll see a message like: Var newwindowtwo= window.Sometimes, Web Developers are surprised to find that the window.close() API doesn’t always close the browser window. The javascript code for the amazonbutton() button is: This function displays an imageīutton as the "Close window" button instead of the default HTML button. The button above calls the amazonbutton() function when clicked on. The HTML code to produce the above button is: We can implement this same button by representing it as an image and adding an onclick event handler to theĬlick the button below to see this on the new window page: You can see in the above image amazon's "Close window" button on the top right-hand corner.Īmazon uses this image below to close windows of its enlarged products page: You can have a custom made "Close Window" button. In this example, we will show how you can implement a "Close Window" button with an image, as amazon does, so that How to Implement an Image Button with the Close() Function The third line places the enlarged image of the Javascript & Jquery book in the window. The first line creates a variable called newwindow which stores the value of an open window function of width and height of 500px. The Javascript code of of the enlargeimage() function is: That has the enlarged version of the image. This tag has an onclick event handler appended to it. The HTML code to create the image above which opens a new enlarged version of the image in a new window is: This is exactly what does for products which they sell. If the image of the product is clicked on, a much larger view of the product can be seen in a new window. This is exactly what many websites do for products which they sell. If you've clicked the image, you can see that it opens a new window, showing a more enlarged size of the image. When the image is clicked, a new windos is opened of an enlarged version of the image. This onclick event handler has the window.close() function, so that itĪnother More Practical, Real-life ExampleĪnother example that is more real-life like is shown below.īelow is a small image of a book. The next line takes this window object and produces the button, which has an onclick event handler appended to it. We assign it to the window.open() function which opens a blank new window of 300 pixels of width and height. In Javascript, we create a variable named newwindow. The Javascript code to open up a new window with a "Close Window" button is: The code for this function is shown right below in Javascript code. This button has an onclick event handler which calls the openwindow function when this button is clicked. To create this "Open New Window" button which you see above, the HTML code to do so is:
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