How to Use `window.console.log` Effectively in Internet Explorer 9?

Window.console.log Access in Internet Explorer 9

In Internet Explorer 9, the window.console.log function behaves differently compared to other browsers. To determine when it is defined, we must consider the following scenarios:

When is window.console.log Defined?

window.console.log is accessible only when the developer tools are open for the current tab. Even after closing the developer tools window, the console object remains available as you navigate to different pages within the same tab. However, if you open a new tab, the console object will not be exposed unless you explicitly open the developer tools for that tab.

Function.prototype Methods and the Console Object

Even when window.console.log is defined, its window.console.log.apply and window.console.log.call methods are not. This is because the console object in IE9 is not a standard DOM object but rather an extension. As such, it doesn't inherit from the Object prototype or have methods inherited from the Function prototype.

However, you can still use some Function.prototype methods on console methods by utilizing the bind() function:

var log = Function.prototype.bind.call(console.log, console);
log.apply(console, ["this", "is", "a", "test"]); // Output: "this is a test"

By binding the console.log function to the Function.prototype, you can access the apply() method and execute console logs with arguments.

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