Are you using node. EDIT: I didn't realize that there was a preview build available. My apologies. Try node hello. I can't understand how everybody assume that we need to use the root folder for this.
Who uses the disk root to host files? Show 1 more comment. Active Oldest Votes. This was done on Windows XP. Improve this answer. Wayne Wayne Works like a Charm!!! Thanks a lot. The trick is to open cmd instead of node. Mitul - Right, this is the detail that was missing from your description -- i.
Starting node with no arguments drops you into the REPL. This is an environment for interactively executing javascript. It's not the place to kick-off the execution of a file. More here: nodejs. Here is a screencast which shows how to install the latest node. This is what paths are meant for, see kcbanner's answer.
Also, the Window's install of Node comes with a Node. The question has been heavily edited from the original, but the main problem the OP was having is that they were trying to execute a file from the REPL. Nothing about my answer is intended as a long-term installation solution, nor is that even implied. The instructions are so simple precisely to illustrate the difference between executing a. Show 7 more comments. Venky Venky 4 4 silver badges 2 2 bronze badges. Setting Node in Environment Variable will easy things — Abhijeet.
Add a comment. Priyantha 4, 4 4 gold badges 23 23 silver badges 40 40 bronze badges. I added node. What is the error? It is hard to provide any help without knowing what the actual error is. Sorry I forgot mention earlier. Please refer to my update in the question. Thanks for helping. Oh, I see.
That looks like a problem inside your hello. How to open the command line interface on your computer depends on the operating system. For Windows users, press the start button and look for "Command Prompt", or simply write "cmd" in the search field.
Navigate to the folder that contains the file "myfirst. Start your command line interface, write node myfirst. If anyone tries to access your computer on port , they will get a "Hello World!
We just launched W3Schools videos. Get certified by completing a course today! We will look at both of these methods inside this section. JavaScript does not have to stay inside browsers. To run JavaScript in console environment, please check out Mozilla Rhino ; to run JavaScript in server environment, please check node.
You could put this anywhere inside your document and it would execute, but some places are definitely better than others — see the Where to put JavaScript section for guidance on this.
As there might be several different types of script available to use on web pages in the future, it makes sense to add the name of the script you are using as a MIME type:. This is not part of any standard and is utterly useless; delete this where you can. This is a throwback to the bad old days, when VBScript was also in popular use on web pages. VBScript usage died however, as it only works in IE. As this only applies to very old browsers you do not need to bother with that any longer.
In order to link to an external JavaScript either on the same server or anywhere on the internet all you have to do is to add a src attribute to your script element:. Upon meeting this element in a page, browsers will then load the file myscript. Any content inside the script element itself will be skipped when you provide a src attribute. The following example will load the file myscript. You can add as many JavaScript files as you want to a document, but there are several considerations to make before going down that route.
Cutting up a lot of JavaScript into different files, each dealing with one task at a time, is a great idea to keep your functionality easy to maintain and allow for quick bug-fixing. For example, you could have several script blocks like these:. However, the development benefits of this are diminished by the effect this has on the performance of your document.
This differs slightly from browser to browser but the worst-case scenario which is sadly enough still the second most-used browser does the following:. All of this means that the display of your web site is slowed down until all of these steps happen for all the scripts you include. This can become annoying for your visitors. One way around this is to use a backend script to create a single file from all the files you use.
That way you have the benefit of keeping maintenance easy while simultaneously cutting down on delays to your web page display. There are several scripts like this on the web — one of them is written in PHP and available from Ed Eliot. Technically you can put JavaScript anywhere in your document. The decision you have to make is to weigh performance against making it easy for developers to find your scripts and ensuring that your JavaScript enhancements work immediately for your visitors.
This has the benefit of being a predictable location of scripts — developers know where to find them. It also has the benefit of ensuring that all JavaScript has been loaded and executed before the document is displayed.
The drawbacks are that your scripts delay the display of the document and that the script does not have access to the HTML in the document. You therefore need to delay the execution of any scripts that change the HTML of the document until the document has finished loading.
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