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Brian Tompsett - 汤莱恩
Brian Tompsett - 汤莱恩
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Rather a technical question concerning javascriptJavaScript events:

Why does

window.onmousewheel = console.log;

throw an Uncaught TypeError: Illegal invocation, while

window.onmousewheel = function (e) {console.log(e); };

works just as expected and prints the event as string? Why is the console.log, when assigned to window.onmousewheel, not just called with one parameter like the lambda expression?

Simon

Rather a technical question concerning javascript events:

Why does

window.onmousewheel = console.log;

throw an Uncaught TypeError: Illegal invocation, while

window.onmousewheel = function (e) {console.log(e); };

works just as expected and prints the event as string? Why is the console.log, when assigned to window.onmousewheel, not just called with one parameter like the lambda expression?

Simon

Rather a technical question concerning JavaScript events:

Why does

window.onmousewheel = console.log;

throw an Uncaught TypeError: Illegal invocation, while

window.onmousewheel = function (e) {console.log(e); };

works just as expected and prints the event as string? Why is the console.log, when assigned to window.onmousewheel, not just called with one parameter like the lambda expression?

Post Closed as "Duplicate" by Naftali, Paul S., Mani, Robby Pond, Blitz
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Simon
Simon
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Events with native vs. lambda functions

Rather a technical question concerning javascript events:

Why does

window.onmousewheel = console.log;

throw an Uncaught TypeError: Illegal invocation, while

window.onmousewheel = function (e) {console.log(e); };

works just as expected and prints the event as string? Why is the console.log, when assigned to window.onmousewheel, not just called with one parameter like the lambda expression?

Simon