GetElementByClass does not support elements with multiple classes

[norberturkiewicz]

Currently the input must search by full class list

Fails

       body A.GetElementByClass'item-title'
undefined class: item-title
      body A.GetElementByClass'item-title'
           ∧

Works

      body A.GetElementByClass'left item-title'
#.Abacus.Main.[Namespace]

[PaulMansour]

We also don't seen to have GetElementsByClass (with an "s")...

[PaulMansour]

Should we make it work on multiple classes:

d GetElementsByClass 'One' 'Two'

would then return elements that have both class One and Two. Or One or Two. Or just have it take only a single class, and then use ∩ and ∪ to get what you want.?

[norberturkiewicz]

How would we determine and/or? What if I want class1 and class2 but they may be in different orders?

[PaulMansour]

Order is no problem. I think we should just copy JavaScript which does an "and" ... all the classes must exist

[PaulMansour]

GetElementsByClass←{
     ⍝ ⍺ ←→ Element (or result of Elements ⍺)
     ⍝ ⍵ ←→ Class(es) Simple or nested: 'One' or 'One Two' or 'One' 'Two'
     ⍝ ← ←→ Elements
     c←' '(≠⊆⊢)1↓∊' ',¨⊆⍵
     e←{1=⍴⍴⍵:⍵ ⋄ Elements ⍵}⍺
     b←e{2≠⍺.⎕NC'class':0 ⋄ ∧/⍵∊' '(≠⊆⊢)⍺.class}¨⊂c
     b/e
 }

[PaulMansour]

Also, I think I should use "GetElementByTag" instead of "ElementByTag" and everywhere else, to be consistent with JavaScript internally consistent in Abacus....