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A type error is generated when a value is not of the expected type. Unlike undefined, null may inadvertently be assigned a valuable developer code in their program. The error represents the absence of any value or object. The value is primitive and false.
The style property is used to get and set the inline style of a document object model element (DOM). DOM is a programming interface that represents the objects you see on a web page or document. You can manipulate this representation in the console.
In this article, we look at the cause of receiving a null typo when using the style property in the DOM, along with some possible solutions.
Why JavaScript is generating null typing error with Style property in DOM
When trying to update the style of an element using JavaScript, we need to call the correct value for the selector we’re invoking. Below are the getElements
used when attempting to manipulate an element in a web page or document.
We can also use the document .querySelector ()
and document.querySelectorAll ()
methods.
Let’s say we have some of the following in the document that we’re trying to manipulate.
Let’s say we want to modify the third and item in the list. Using the DOM, the code should look like this:
However, this code will generate a null error because we don’t have an identifier called ’third’. The id we are trying to change in our JavaScript code is a missing value. The identifying name of the third item in the list is coded as ’fourth’.