Canvas not rendering after ajax call

[AleksandarTokarev]

Hello, I am using jSignature with rails, and i have a dropdown menu with users, and each user has his own signature. Basically i am using Ajax to call action in controller, which renders partial which has the signature. After making the Ajax call, everything is rendered ok, except the canvas (there is nothing on the screen, and i can not sign anything) Here is the signature on first render of page (without any Ajax, just normal rendering of partial in view) http://screencloud.net/v/9g8b and it is ok.

After i change the value of dropdown, i do ajax call and canvas is empty ( i can not draw ) https://screencloud.net/v/hDTF

[zevero]

You may try to trigger a resize Event

window.dispatchEvent(new Event('resize'));

or control the height via css

canvas.jSignature { height: 270px; }