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bower.io "existential" keyword

existential 1.0.3
The missing existential operator for JavaScript. Returns true unless a variable is null or undefined
4 versions - Latest release: over 10 years ago - 1 stars on GitHub
existential-default 1.3.1
Check for the existential value of a variable. Assign value by default.
11 versions - Latest release: almost 10 years ago - 0 stars on GitHub