Comments on: Hello World @ JavaScript

By: 肥冬

肥冬 — Sun, 27 Jun 2010 12:25:48 +0000

唔好咁快接觸我

By: KevinLam

KevinLam — Thu, 24 Jun 2010 08:29:21 +0000

Q1
將 helloWorld 呢個function assign 作 onload event 的 listener, 屬 definition/intialization, 放係 head 係一般做法.

留意 helloWorld 後面無加括號, 因為唔係要 call function, 而係將個function name 當作 variable 使用.

Q2:
其實係 suppose 由event 直接/間接trigger, 唔係body, 亦唔係head. 係呢個case, 就係由 onload event trigger.

By: suk

suk — Thu, 24 Jun 2010 07:59:53 +0000

(學生再問)
helloWorld定義左之後, 係咪suppose會係body入面call黎用?
定係一般會好以呢個example咁, 係head入面用佢?

By: suk

suk — Thu, 24 Jun 2010 07:56:47 +0000

(學生問)
window.onload = helloWorld;
呢句不太明

唔明點解放係head入面, 因為話 ‘把 function 定義在 head 之內, 需要時再執行’ , 咁就唔明點解window.onload = helloWorld係咪都算一種function定義….如果window.onload 唔係 helloWorld 咁default係乜
如果唔將behaviour 從 content 分出來, 會有乜野唔好?