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@ -21,9 +21,9 @@ Running PsychoPy experiments online requires the generation of an index.html fil
Starting with PsychoPy version 3.0, [PsychoPy Builder](http://www.psychopy.org/builder/builder.html) can automatically generate the javascript and html files. Many of the existing Builder experiments should "just work", subject to the Components being currently supported by PsychoJS (see below). Starting with PsychoPy version 3.0, [PsychoPy Builder](http://www.psychopy.org/builder/builder.html) can automatically generate the javascript and html files. Many of the existing Builder experiments should "just work", subject to the Components being currently supported by PsychoJS (see below).
### JavaScript Code ### JavaScript Code
We built the PsychoJS library to make the JavaScript experiment files look and behave in very much the same way as to the Builder-generated Python files. PsychoJS offers classes such as `Window` and `ImageStim`, with very similar attributes to their Python equivalents. Experiment designers familiar with the PsychoPy library should feel at home with PsychoJS, and can expect the same level of control they have with PsychoPy, from the the structure of the trials/loops all the way down to frame-by-frame updates. We built the PsychoJS library to make the JavaScript experiment files look and behave in very much the same way as to the Builder-generated Python files. PsychoJS offers classes such as `Window` and `ImageStim`, with very similar attributes to their Python equivalents. Experiment designers familiar with the PsychoPy library should feel at home with PsychoJS, and can expect the same level of control they have with PsychoPy, from the structure of the trials/loops all the way down to frame-by-frame updates.
There are however notable differences between the the PsychoJS and PsychoPy libraries, most of which have to do with the way a web browser interprets and runs JavaScript, deals with resources (such as images, sound or videos), or render stimuli. To manage those web-specific aspect, PsychoJS introduces the concept of Scheduler. As the name indicate, Scheduler's offer a way to organise various PsychoJS along a timeline, such as downloading resources, running a loop, checking for keyboard input, saving experiment results, etc. As an illustration, a Flow in PsychoPy can be conceptualised as a Schedule, with various tasks on it. Some of those tasks, such as trial loops, can also schedule further events (i.e. the individual trials to be run). There are however notable differences between the PsychoJS and PsychoPy libraries, most of which have to do with the way a web browser interprets and runs JavaScript, deals with resources (such as images, sound or videos), or render stimuli. To manage those web-specific aspect, PsychoJS introduces the concept of Scheduler. As the name indicate, Scheduler's offer a way to organise various PsychoJS along a timeline, such as downloading resources, running a loop, checking for keyboard input, saving experiment results, etc. As an illustration, a Flow in PsychoPy can be conceptualised as a Schedule, with various tasks on it. Some of those tasks, such as trial loops, can also schedule further events (i.e. the individual trials to be run).
Under the hood PsychoJS relies on [PixiJs](http://www.pixijs.com) to present stimuli and collect responses. PixiJs is a multi-platform, accelerated, 2-D renderer, that runs in most modern browsers. It uses WebGL wherever possible and silently falls back to HTML5 canvas where not. WebGL directly addresses the graphic card, thereby considerably improving the rendering performance. Under the hood PsychoJS relies on [PixiJs](http://www.pixijs.com) to present stimuli and collect responses. PixiJs is a multi-platform, accelerated, 2-D renderer, that runs in most modern browsers. It uses WebGL wherever possible and silently falls back to HTML5 canvas where not. WebGL directly addresses the graphic card, thereby considerably improving the rendering performance.