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38 lines
791 B
Markdown
38 lines
791 B
Markdown
# Sources
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Sources are special objects that store a single value and are the core of
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Vide's reactivity.
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A source can be created using `source()`.
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```luau
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local source = vide.source
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local count = source(0)
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```
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The value passed to `source()` is the initial value of the source.
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The value of a source can be set by calling it with an argument, and can be read
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by calling it with no arguments.
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```luau
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count(count() + 1) -- increment count by 1
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```
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Sources can be *derived* by wrapping them in functions.
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```luau
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local count = source(0)
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local text = function()
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return "count: " .. tostring(count())
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end
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print(text()) -- "count: 0"
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count(1)
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print(text()) -- "count: 1"
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```
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While the above can be achieved with plain variables, the use for sources will
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be obvious in the next part.
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