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A JavaScript Nightmare
@manucastrillonm
JavaScript is a weird language
@manucastrillonm
@manucastrillonm
@manucastrillonm
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@manucastrillonm
Ok no... Is not that weird
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Coercion
@manucastrillonm
Coercion
Forces a variable of a certain type to have the behavior of a different one.
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@manucastrillonm
Why do we need this?
@manucastrillonm
JavaScript is a non-typed language
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Duck Typing
“If it walks like a duck and it quacks like a duck, then it must be a duck”
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@manucastrillonm
Don't worry!
coercion
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Equality operator
==
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Addition operator
+
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Subtraction operator
-
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Truthy and Falsy
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In a boolean context, all values are True except
false
0
""
''
null
undefined
NaN
document.all
@manucastrillonm
Conclusion
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Done
JS coercion
By Manu Castrillón
Made with Slides.com
JS coercion
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Manu Castrillón
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