![]() ![]() In some cases, this error is a symptom of another issue. And if you need to access path, then folder needs to be defined. You just have to make sure that if you need to access folder, than Tree has to be defined. Sometimes, your object is nested deeper like. For our example: var input = document.getElementById("btn") To make sure that you don't get this error, you have to make sure that btn, or any object you use, is not null before you use it. When you break it down, the error actually makes sense. null does not have the property 'value' Input // when this fails, it returns null. Let me break it down in simpler steps var input = document.getElementById("input") The reason will be that the element with id input does not exist. This will result in Uncaught TypeError: Cannot read property 'value' of null. Var inputVal = document.getElementById("input").value These usually happens when we don't test an object before using it. Uncaught TypeError: Cannot read property 'innerHTML' of nullĪll this means is that you are trying to access a property of an object that is undefined. Uncaught TypeError: Cannot read property 'value' of null Sometimes instead of null it will say undefined. There are a few variations of this error depending on the property you are trying to access. Test if an object is valid before accessing its property.You are trying to access a DOM element before the DOM is ready.For example, document.getElementById('stuff') returns null. You are accessing a property of an object that is null.Maybe there is a support application that you missed to install together with the application. If the error still keeps on appearing, read the application’s documentation or its readme file. Run the application again after the disk check. Right click on drive C and then select Properties.Ĭheck Automatically fix file system errors and then hit Start. ![]() ![]() If you have your own disk utility application installed on your computer, run it to check your disk. An error in the hard drive’s file structures might cause this problem. If the device is working properly, try upgrading it if it’s possible. An incomplete installation of an application may also cause this error.Ĭheck your video card’s driver if it is working properly by accessing the Device Manager in My Computer. Depending on what application you are using when the error appeared, make sure that it is installed properly. There are also some instances where this error appears while you are playing a game on your computer or maybe playing a video. Director Player Error – This application requires an Xtra (Text) … ![]()
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