所有内置的javascript对象

Question

I need to get list of all javascript objects. In other words i need all NameOfXObject, for which such x exists, that:

x+""
will return "[object NameOfXObject]"

for example:

document+""         --> "[object HTMLDocument]"
window+""           --> "[object Window]"
locationStorage+""  --> "[object Storage]"

To sumarize: I need list containing: "HTMLDocument", "Window", "Storage"...

I've tried

Object.keys(window)

But it not returns all objects

Thanks in advance, sorry for my english

Answer 1

You need to traverse the prototype chain of window with Object.getOwnPropertyNames to get all the properties attached to it.

var target = window,
    result = [];

do {
    result = result.concat(Object.getOwnPropertyNames(target));
} while(target = Object.getPrototypeOf(target))

result = result
    //Filter out properties such as "onclick" which are null by default
    .filter(function(r){ return window[r] != null; }) 
    //Optional: filter out those whose type is not "object"
    .filter(function(r){ return typeof window[r] === 'object'; }); 

---

For me (Chrome v50 in this very page) filtering the results to only include property names whose length is 24 returned

["SpeechSynthesisUtterance", "PresentationAvailability", "BeforeInstallPromptEvent", "CanvasRenderingContext2D", "SVGRadialGradientElement", "SVGLinearGradientElement", "SVGFEGaussianBlurElement", "SVGFEDistantLightElement", "SVGAnimatedTransformList"]

but all of those are functions instead of objects and thus for those x+'' will give something more like "function SpeechSynthesisUtterance() { [native code] }" so I'm not sure if it contains what you were trying to find.

---

To get a list containing the string representations like ['[object Math]', ...] , add

    //Get the string representation of the global object
    .map(function(r){ return window[r] + ''; });

For me, one of those had the length of 24: '[object SpeechSynthesis]'