Force NetBeans to provide code completion for a JavaScript variable assuming a specific type

Question

I am using NetBeans, specifically the HTML5 & PHP bundle. Currently I'm working on a game which makes use of the HTML5 canvas element. I have a global variable called context:

var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');

Obviously, the IDE has no idea what type context is, since it cannot find out the type of canvas in the first place and it can't possibly know what getContext() is going to return when called on that canvas. I would like NetBeans to provide code completion feature for context assuming it represents a specific type (namely, CanvasRenderingContext2D). After doing some research I found this: https://blogs.oracle.com/netbeansphp/entry/defining_variable_type_in_a. The site states that such feature can be used in PHP by providing a PHPDoc comment which looks like the following: /* @var $variable type */. I am aware it concerns PHP, but I decided to give it a try in JavaScript as well:

/* @var context CanvasRenderingContext2D */

Unfortunately, the above did not work. I thought that maybe NetBeans for some reason doesn't know that type and tried something simpler:

/* @var test HTMLImageElement */

Again, there were no proposals for test except for the ones that are native to all JavaScript objects.

So, is this even possible? I would appreciate it if someone provided a solution. Thanks in advance!

ladar · Accepted Answer · 2014-07-01 05:56:42Z

5

JavaScript uses JSDoc, not PHPDoc, so you need to use

/** @type HTMLImageElement */
var myImage;

answered Jul 1, 2014 at 5:56

ladar

5,8864 gold badges29 silver badges39 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

rhino Over a year ago

Thanks, it works fine with HTMLImageElement, unfortunately there are no hints for CanvasRenderingContext2D. It seems they haven't added support for that yet: netbeans.org/bugzilla/show_bug.cgi?id=234149 but anyway this is the right answer to my question, so I'm accepting it.

Collectives™ on Stack Overflow

Force NetBeans to provide code completion for a JavaScript variable assuming a specific type

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related