[HtmlUnit] [htmlunit:bugs] #1964 NPE HtmlTextArea.removeFocus()

- **status**: open --> closed



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** [bugs:#1964] NPE HtmlTextArea.removeFocus()**

**Status:** closed
**Group:** Latest SVN
**Labels:** textarea NPE 
**Created:** Fri Jun 01, 2018 08:35 AM UTC by Flake
**Last Updated:** Fri Jun 29, 2018 02:19 PM UTC
**Owner:** RBRi


Hi Ron,

I encountered a NPE that I didn't expect (haha). (2.32-SNAPSHOT)

Assume you have a textarea t. You type something in and then you need to blur it in order for some js to trigger.

~~~java
WebClient webClient = new WebClient(BrowserVersion.CHROME);
		HtmlPage page = webClient.getPage("http://localhost:8080");
		
		HtmlTextArea ta = HtmlPageTools.getHtmlElementById("ta", page);
		ta.type("test");
		ta.removeFocus();
		
		webClient.close();
~~~

This is how I did it. I used the `removeFocus()` public API beause I didn't know there was `blur()` for textarea, too. However, by doing this you get a NPE because `valueAtFocus_` ain't seem to be set (because you didn't manually `focus()` it). I assumed it was focused after typing something in and it probably is but not via textarea's `focus()`. Actually, after taking a quick look im not sure if it's even focused.
The problematic line is this:

https://sourceforge.net/p/htmlunit/code/HEAD/tree/trunk/htmlunit/src/main/java/com/gargoylesoftware/htmlunit/html/HtmlTextArea.java#l515

The fix should be as easy as this:

~~~java
    public void removeFocus() {
        super.removeFocus();
        if (valueAtFocus_ != null && !valueAtFocus_.equals(getText())) {
            HtmlInput.executeOnChangeHandlerIfAppropriate(this);
        }
        valueAtFocus_ = null;
    }
~~~

Best,
Ron2


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