i want to keep unit zoom level

[stone89son]

Default display :

I expect it to show up:

I had setting zoom level but not working.

[ivanreis96]

You should try to setup the props something like this:
<Timeline
items={itemsTimeline}
groups={groupsTimeline}
sidebarWidth={165}
defaultTimeStart={moment().add(-15, 'day')}
defaultTimeEnd={moment().add(15, 'day')}
minZoom={moment.duration(5, 'days').asMilliseconds()}
maxZoom={moment.duration(12, 'months').asMilliseconds()}
stackItems
canMove={false}
canResize={false}
itemHeightRatio={0.2}
lineHeight={20}
itemRenderer={CustomItemRendererWrapper}
groupRenderer={CustomGroupRendererWrapper}
/>

  these are the importants lines:
   defaultTimeStart={moment().add(-15, 'day')}
    defaultTimeEnd={moment().add(15, 'day')}