is-nan

ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
OpenBrowse Files
isNaNnot a numbernumberisNaNES6ES2015shimpolyfilles-shim API

mdn-polyfills

MDN polyfills
OpenBrowse Files
assigncreateoffromfindforEachfillfilterfindIndexfirstElementChildincludessomereducerepeatstartsWithendsWithbindclosesttoggleAttributematchesisIntegerisNaNtoBlobObject.assignObject.createObject.entriesObject.keysObject.valuesArray.ofArray.fromArray.prototype.fillArray.prototype.findArray.prototype.forEachArray.prototype.filterArray.prototype.findIndexArray.prototype.includesArray.prototype.someArray.prototype.reduceString.prototype.includesString.prototype.repeatString.prototype.startsWithString.prototype.endsWithString.prototype.padStartString.prototype.padEndString.prototype.trimNode.prototype.addEventListenerNode.prototype.appendNode.prototype.prependNode.prototype.beforeNode.prototype.afterNode.prototype.removeNode.prototype.replaceWithNode.prototype.childrenNode.prototype.firstElementChildNodeList.prototype.forEachFunction.prototype.bindElement.prototype.closestElement.prototype.toggleAttributeElement.prototype.matchesElement.prototype.classListElement.prototype.getAttributeNamesHTMLCanvasElement.prototype.toBlobMouseEventCustomEventNumber.isIntegerNumber.isNaNpolyfillspolyfillmdn

is-nan-x

ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.
OpenBrowse Files
numberisNaNmodulejavascriptnodejsbrowser

number.isnan

ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
OpenBrowse Files
isNaNnot a numbernumberisNaNES6ES2015shimpolyfilles-shim API

what-is

A very simple "typeof" detection
OpenBrowse Files
isArrayisDateisNaNisInfinityisNullisUndefinedisObjectisRegExpisStringkindtypetypeof