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46 lines
906 B
Markdown
46 lines
906 B
Markdown
# druid.back_handler API
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> at /druid/base/back_handler.lua
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Component to handle back button. It handles Android back button and Backspace key.
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### Setup
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Create back handler component with druid: `druid:new_back_handler(callback)`
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### Notes
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- Key triggers in `input.binding` should be setup for correct working
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- It uses a key_back and key_backspace action ids
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## Functions
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- [init](#init)
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## Fields
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- [on_back](#on_back)
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- [params](#params)
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### init
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---
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```lua
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back_handler:init([callback], [params])
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```
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The Back Handler constructor
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- **Parameters:**
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- `[callback]` *(function|nil)*: The callback to call when the back handler is triggered
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- `[params]` *(any)*: Custom args to pass in the callback
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## Fields
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<a name="on_back"></a>
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- **on_back** (_event_): Trigger on back handler action, fun(self, params)
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<a name="params"></a>
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- **params** (_any_): Custom args to pass in the callback
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