javascript - Grab `this` from caller function object -


i have some code i'm invoking everywhere this.

screenshot.snap(this, $('.navbar-inner .container'));

in above code, this object being passed in mocha.js. contains information current test name, file it's in, etc. use information name screenshot.

i want remove need pass in this reference everywhere, no matter how try reach inside of snap function, unable find information need.

var testcontext = exports.snap.caller; //.prototype? .this?

i have inspected exports.snap.caller.tostring(), , function called in mocha test suite. did through debugging repl, , on further inspection see information can the properties of function instance, contains nothing calling function's this.

is there way this, or stuck passing in this argument every time call screenshot.snap function?

you might able in before block like:

var snap; before(function () {     browser.get('https://angularjs.org');     snap = screenshot.snap.bind(this); });

and replace use of screenshot.snap(this, $('.navbar-inner .container')); snap($('.navbar-inner .container');

depending on how this pointer handled mocha, may need in beforeeach loop instead.


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