CODEWITHSUNDEEP
javascripttypeerror
Elfy
Elfy

Reputation: 1863

document.createElement illegal invocation

I was thinking to minimize some javascript code but I get this "illegal invocation" error when I try to call a function through an alias

var d = document.createElement;
d('input');

Does anybody know why? tx

Upvotes: 5

Views: 1794

Answers (2)

CollinD
CollinD

Reputation: 7573

Looks like this has been addressed by others. It boils down to the fact that

document.createElement checks to make sure that this refers to document. You can bypass this behavior by doing the following:

Either A: always use it as document.createElement(tagname) OR

B

var o = document.createElement
o.call(document, tagname)

C

var d = document.createElement.bind(document);

(from above answer)

See http://blog.vjeux.com/2011/javascript/hook-document-createelement.html

Upvotes: 9

Jaromanda X
Jaromanda X

Reputation: 1

use

var d = document.createElement.bind(document);

to bind the this in your d function to the document object

Upvotes: 5

Related Questions