When previewing lots of Box Files on same web page, the webpage will jump up and down

[hxwhou]

Please fill out the following template so we can reproduce and fix your issue as quickly as possible!

Environment:

• Preview version:1.7.0
• Browser name and version:chrome and firefox
• Operating system and version: Mac OS 10.11.6

Steps to reproduce the problem:

1. preview lots of box files on same webpage
2. Programmtically focus on the viewer after it loads

// Programmtically focus on the viewer after it loads
 if (this.viewer && this.viewer.containerEl) {
        this.viewer.containerEl.focus();
 }

3. I am not sure whether it is a good experience in this situation, because it will make the screen jump

What is the expected behavior? (Screenshots can be helpful here)
I don't want to focus on the viewer after it loads, so could you please
provide a method or param to prevent focus automatically in source code.

What went wrong? (Screenshots can be helpful here)

Link to application or sample code:

If relevant, link to file (or attach file here):

[tonyjin]

Thanks for the report! We'll take a look.

[hxwhou]

Auto focus is a good feature when there is only one preview container. But when a lots of preview container on the same web page, it looks not good. So maybe provide a parameter to control whether to focus or not is a good idea. Looking froward to next release this bug will be fixed.
Many thanks!