RunKit + 
Try any Node.js package right in your browser
This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 1,000,000+ packages pre-installed, including validate.io. Try it out:
var validate = require( "validate.io" );
function is( bool, value, msg ) {
if ( validate.isRegexp( value ) ) {
value = value.toString();
}
else if ( validate.isFunction( value ) ) {
value = value.constructor.name;
}
else {
value = JSON.stringify( value );
}
console.log( "%s is %s%s", value, ( bool ) ? "" : "not ", msg );
}
var methods,
bool,
vals,
fcn,
msg,
v,
N, M,
i, j;
vals = [
"beep",
5,
Math.PI,
-0,
true,
null,
undefined,
[],
{},
function foo(){},
/.*/,
new Date(),
-1,
JSON.parse
];
methods = [
[ validate.isStringPrimitive, "a string" ],
[ validate.isNegativeZero, "negative zero" ],
[ validate.isPositiveInteger, "a positive integer" ],
[ validate.isPositive, "a positive number" ],
[ validate.isNegativeInteger, "a negative integer" ],
[ validate.isNull, "null" ],
[ validate.isUndefined, "undefined" ],
[ validate.isBoolean, "a boolean" ],
[ validate.isNativeFunction, "a native function" ],
[ validate.isFunction, "a function" ],
[ validate.isArray, "an array" ],
[ validate.isStrictDate, "a date object" ],
[ validate.isRegexp, "a regular expression" ],
[ validate.isObject, "an object" ]
];
N = vals.length;
M = methods.length;
for ( i = 0; i < N; i++ ) {
v = vals[ i ];
for ( j = 0; j < M; j++ ) {
fcn = methods[ j ][ 0 ];
msg = methods[ j ][ 1 ];
bool = fcn( v );
if ( bool ) {
is( bool, v, msg );
break;
} else {
is( bool, v, msg );
}
}
}
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