I wrote a cross-browser tab extension, but you don’t do

I wrote a cross-browser tab extension, but you don’t dolike that. 3r33383. 3r3-31. 3r33333. A long, tedious intro with a claim to delusions of grandeur 3r-3362. 3r33333.  3r33383. Once I discovered that something, as always, does not suit me much in this world. Namely, having entered some long query in a search engine on a desktop computer and then switching to a tablet, I could not recall the text of the query word for word in order to get exactly the same results. It all started so well. I saw in the search engine a link to the answer to my question and realized that it promises a long reading. Then I turned off the computer and flopped onto the sofa with ...
+ 0 -

Fast interactive hall layout on canvas

Fast interactive hall layout on canvas  
 
We are developing a library for displaying large interactive schemes of halls on canvas without frameworks and making it work well in ie and mobile devices. Along the way, we understand the peculiarities of canvas.
 
demo , so it will be clearer than what it's about.
 
In the article I will insert only small parts of the code, the rest can be viewed at
 
GitHub
 
 
Remember that canvas is essentially a picture with api, so handling hoverers and clicks on our conscience: you need to count the coordinates yourself, taking into account the scale and scroll, to search for objects by their coordinates...
+ 0 -