TypecheckJS

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Description

Typecheck is a small library that checks the type of the variables that are passed in against a selected type. I actually wrote it mainly to explore design patterns and library creation in JavaScript while it always comes in handy when I need to resolve some tricky variable type checks.

Currently handles check for the following types:

• arrays
• strings
• numbers (both stringified or not)
• numerics (only actuall numbers)
• undefined & null
• Inifinity
• functions
• objects

####Use

In order to use typecheck include it on the head or body part of the html in a script tag once. Make sure to be included before a reference to code that needs it. You can use it to:

• Check the type of a single variable. e.g:

var myObject = { someprop: "example"};

typecheck.object(myObject); //true
typecheck.array(myObject) //false

• Check the the type of the variable and the length if it is an string, array or the value of anumber or numeric. e.g:

var nameList = ['dim', 'nick', 'john'];

typecheck.array(nameList, 3); //true
typecheck.array(nameList, '<5'); //true
typecheck.array(nameList, undefined); //false
typecheck.array(6, '>5'); //true

• Check the type of many variables. Also all of them can be checked against a length similar to above. e.g:

var myObjects = [{ someprop: "first"}, {anotherprop: "second"}];
var myStrings = ["string1", "string2", "string3"]

typecheck.many.objects(myObjects); //true
typecheck.many.arrays(myObjects) //false

typecheck.many.strings(myStrings,'>3') //length of each>3 true
typecheck.many.strings(myStrings,'!5') //true
typecheck.many.strings(myStrings,'!7') //false

• Check if an object is of specific type and is empty/filled. e.g:

var emptyObject = {};

typecheck.empty.object(emptyObject); //true
typecheck.empty.array(emptyObject); //false
typecheck.filled.object(emptyObject); //false

#####Customization

You can easily add your own types and typechecks, customize existing checks and add your own plugins like empty, filled and many. For this , please take a look at docs/typecheck.html