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firstElementChild / firstChild‏ / children[0]

Thursday, 21 January 2010 16:55
Some time ago, I used the function in my javascript code firstElementChild. On Firefox it works fine but Internet Explorer does not work.

After some research, I discovered that indeed firstElementChild not working on any Internet Explorer but works on Firefox from version 3.5!

So I decided to try with firstChild, which according to the link below works on all browsers:

However, testing is now the opposite, my javascript works in IE but not Firefox! Indeed, once Firefox is misinterpreted, is apparently a well known problem GECKO engine is the indentation of the code that is the problem ! It would be a problem breaking space... In summary, if all tags are appressed to each other, firstChild work perfectly!

I decided then I dive into some of my old scripts that worked very well on most browsers. I used childNodes[0] which is exactly the same but is much less compatibility problems. I now use only childNodes[0]...

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