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d044abe | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 | """Browser tasks with explicit semantic DOM and computed-style checks."""
from html import escape
HTML_BASES=[
('heading','h1','<h1>Welcome</h1>','an h1 heading reading Welcome',{}),
('paragraph','p','<p>Hello reader</p>','a paragraph reading Hello reader',{}),
('link','a','<a href="/help">Help</a>','a Help link to /help',{'href':'/help'}),
('button','button','<button type="button">Save</button>','a Save button with type button',{'type':'button'}),
('image','img','<img src="icon.png" alt="Star">','an image sourced from icon.png with alt text Star',{'src':'icon.png','alt':'Star'}),
('email','input','<input type="email" name="email">','an email input named email',{'type':'email','name':'email'}),
('checkbox','input','<input type="checkbox" name="agree">','a checkbox named agree',{'type':'checkbox','name':'agree'}),
('form','form','<form action="/send" method="post"><button>Send</button></form>','a POST form targeting /send containing a Send button',{'action':'/send','method':'post'}),
('list','ul','<ul><li>Tea</li><li>Water</li></ul>','an unordered list containing Tea then Water',{}),
('ordered_list','ol','<ol><li>Open</li><li>Close</li></ol>','an ordered list containing Open then Close',{}),
('navigation','nav','<nav><a href="/">Home</a></nav>','a navigation element with a Home link to /',{}),
('article','article','<article><h2>News</h2><p>Today</p></article>','an article with an h2 News and a paragraph Today',{}),
('footer','footer','<footer>Copyright</footer>','a footer reading Copyright',{}),
('quote','blockquote','<blockquote cite="/source">Be kind</blockquote>','a blockquote reading Be kind citing /source',{'cite':'/source'}),
('code','pre','<pre><code>x = 1</code></pre>','a preformatted code block reading x = 1',{}),
('details','details','<details><summary>More</summary><p>Details</p></details>','a details element with summary More and paragraph Details',{}),
('select','select','<select name="color"><option value="red">Red</option><option value="blue">Blue</option></select>','a select named color with Red/red and Blue/blue options',{'name':'color'}),
('textarea','textarea','<textarea name="note" rows="3">Note</textarea>','a textarea named note with three rows initially reading Note',{'name':'note','rows':'3'}),
('label','label','<label for="username">Name</label>','a Name label associated with input ID username',{'for':'username'}),
('progress','progress','<progress max="10" value="4">4/10</progress>','a progress element with maximum 10 and value 4',{'max':'10','value':'4'}),
]
GLOBAL=[('title','Information','a title attribute of Information'),('lang','en','English language via lang'),
('dir','rtl','right-to-left direction via dir'),('hidden','','the hidden attribute'),
('tabindex','0','keyboard focus via tabindex 0'),('contenteditable','true','contenteditable set to true')]
def html_assertions(markup,prefix=''):
# Derive structural checks from the authored spec tree, not candidate text.
from html.parser import HTMLParser
class Parse(HTMLParser):
def __init__(self):super().__init__();self.stack=[];self.counts={};self.out=[]
def handle_starttag(self,tag,attrs):
parent=self.stack[-1][0] if self.stack else prefix
key=(parent,tag);self.counts[key]=self.counts.get(key,0)+1
selector=(parent+' > ' if parent else '')+tag+f':nth-of-type({self.counts[key]})'
self.out.append({'kind':'exists','selector':selector})
for k,v in attrs:self.out.append({'kind':'attribute','selector':selector,'name':k,'value':v or ''})
if tag not in ('img','input','br','hr','meta','link'):self.stack.append((selector,tag))
def handle_endtag(self,tag):
if self.stack and self.stack[-1][1]==tag:self.stack.pop()
def handle_data(self,text):
if text.strip() and self.stack:self.out.append({'kind':'text','selector':self.stack[-1][0],'value':text})
p=Parse();p.feed(markup);return p.out
def html_tasks():
tasks=[]
for name,tag,code,desc,attrs in HTML_BASES:
for attr,value,detail in GLOBAL:
markup=code.replace('<'+tag,'<'+tag+' '+attr+'="'+value+'"',1)
tasks.append(('easy',{'kind':'html','base':name,'feature':attr},'Create '+desc+'. On its outer element, set '+detail+'. Return an HTML fragment.',markup))
for i,(name,tag,code,desc,attrs) in enumerate(HTML_BASES):
for offset,wrapper in ((1,'section'),(4,'aside'),(9,'div')):
_,_,code2,desc2,_=HTML_BASES[(i+offset)%len(HTML_BASES)]
markup=f'<{wrapper}>{code}{code2}</{wrapper}>'
tasks.append(('medium',{'kind':'html','pair':[i,(i+offset)%20],'wrapper':wrapper},f'Create a {wrapper} containing {desc}, followed by {desc2}. Return an HTML fragment.',markup))
for i,(_,_,code,desc,_) in enumerate(HTML_BASES):
_,_,code2,desc2,_=HTML_BASES[(i+7)%20]
markup=f'<main><section>{code}</section><aside>{code2}</aside></main>'
tasks.append(('moderate',{'kind':'html','layout':[i,(i+7)%20]},f'Create a main element. Put {desc} inside its section, and {desc2} inside its following aside. Return an HTML fragment.',markup))
return [dict(difficulty=d,spec=s,prompt=p,reference=c,fixture='',checks=html_assertions(c)) for d,s,p,c in tasks]
# Fixed values are chosen to have exact, stable computed representations.
CSS_PROPERTIES=[
('color','rgb(10, 20, 30)'),('background-color','rgb(240, 220, 200)'),('font-size','20px'),('font-weight','700'),
('font-style','italic'),('text-align','center'),('text-transform','uppercase'),('letter-spacing','2px'),
('word-spacing','4px'),('line-height','28px'),('text-indent','12px'),('white-space','pre'),
('padding-top','8px'),('padding-right','10px'),('padding-bottom','12px'),('padding-left','14px'),
('margin-top','6px'),('margin-right','8px'),('margin-bottom','10px'),('margin-left','12px'),
('border-top-width','3px'),('border-bottom-color','rgb(0, 80, 120)'),('border-radius','6px'),('opacity','0.5'),
('width','120px'),('height','60px'),('min-width','90px'),('max-width','180px'),('box-sizing','border-box'),
('display','flex'),('flex-direction','column'),('justify-content','center'),('align-items','center'),('gap','8px'),
('position','relative'),('top','5px'),('overflow-x','hidden'),('visibility','hidden'),('cursor','pointer'),('list-style-type','square')]
BASE_CSS='* { box-sizing: content-box; } .target,.other { border: 1px solid black; width:200px; height:80px; min-width:0; max-width:none; margin:0; padding:0; display:block; position:static; }'
FIXTURE='<div id="scope"><div id="target" class="target" data-kind="card">Alpha<span>One</span><span>Two</span></div><div class="other">Beta</div></div><div class="target" id="outside">Outside</div>'
def css_tasks():
tasks=[]
for prop,val in CSS_PROPERTIES:
for sel,description,affected in [('.target','every element with class target',['#target','#outside']),('#target','only the element with ID target',['#target']),('#scope > .target','only direct children of #scope having class target',['#target'])]:
spec={'kind':'css','selector':sel,'declarations':{prop:val}}
checks=[{'kind':'style','selector':x,'property':prop,'value':val} for x in affected]
extra = 'display: flex;' if prop in ('flex-direction','justify-content','align-items','gap') else ('position: relative;' if prop=='top' else '')
if extra:
extra_prop='display' if prop!='top' else 'position'
extra_val='flex' if prop!='top' else 'relative'
checks += [{'kind':'style','selector':x,'property':extra_prop,'value':extra_val} for x in affected]
spec['declarations'][extra_prop]=extra_val
if prop=='flex-direction':checks += [{'kind':'layout_column','selector':x} for x in affected]
if prop=='display':checks += [{'kind':'layout_row','selector':x} for x in affected]
checks +=[{'kind':'unchanged','selector':'.other','property':prop}]
if len(affected)==1:checks +=[{'kind':'unchanged','selector':'#outside','property':prop}]
extra_instruction = ' Use flex display.' if extra.startswith('display') else (' Use relative positioning.' if extra else '')
tasks.append(dict(difficulty='easy',spec=spec,prompt=f'Style {description}: set {prop} to {val}.{extra_instruction} Leave other elements unchanged. Return CSS only.',reference=f'{sel} {{ {prop}: {val}; {extra} }}',fixture=FIXTURE,checks=checks))
pairs=[]
# Avoid interactions that would invalidate literal computed values.
for i in range(20):
for offset in (4,7,11):pairs.append((i,(i+offset)%20))
for i,j in pairs:
p,v=CSS_PROPERTIES[i];q,w=CSS_PROPERTIES[j]
spec={'kind':'css','selector':'#scope > .target','declarations':{p:v,q:w}}
checks=[{'kind':'style','selector':'#target','property':k,'value':x} for k,x in ((p,v),(q,w))]
checks +=[{'kind':'unchanged','selector':'.other','property':k} for k in (p,q)]
tasks.append(dict(difficulty='medium',spec=spec,prompt=f'For direct children of #scope with class target, set {p} to {v} and {q} to {w}. Leave .other unchanged. Return CSS only.',reference=f'#scope > .target {{ {p}: {v}; {q}: {w}; }}',fixture=FIXTURE,checks=checks))
for i,(prop,val) in enumerate(CSS_PROPERTIES[:20]):
# Baseline captured before candidate CSS; test both sides of the breakpoint.
spec={'kind':'css','selector':'#target','declarations':{prop:val},'max_width':600}
checks=[{'kind':'style','selector':'#target','property':prop,'value':val,'viewport':480},
{'kind':'unchanged','selector':'#target','property':prop,'viewport':900},
{'kind':'unchanged','selector':'.other','property':prop,'viewport':480}]
tasks.append(dict(difficulty='moderate',spec=spec,prompt=f'At viewport widths at most 600px, set {prop} to {val} on #target. At wider widths, preserve its original style. Never change .other. Return CSS only.',reference=f'@media (max-width: 600px) {{ #target {{ {prop}: {val}; }} }}',fixture=FIXTURE,checks=checks))
return tasks
DOM_FIXTURE='<button id="action">Go</button><input id="input" value=""><p id="output">0</p><ul id="items"></ul><input id="check" type="checkbox">'
DOM_ACTIONS=[
('greeting','make #output read Hello',"o.textContent='Hello'",[{'kind':'text','selector':'#output','value':'Hello'}]),
('increment','increase the integer in #output by one',"o.textContent=String(Number(o.textContent)+1)",[{'kind':'text','selector':'#output','value':'2'}]),
('decrement','decrease the integer in #output by one',"o.textContent=String(Number(o.textContent)-1)",[{'kind':'text','selector':'#output','value':'-2'}]),
('mirror','copy the input value into #output',"o.textContent=i.value",[{'kind':'text','selector':'#output','value':'Ab 9'}]),
('uppercase','copy the uppercased input into #output',"o.textContent=i.value.toUpperCase()",[{'kind':'text','selector':'#output','value':'AB 9'}]),
('length','put the input character count in #output',"o.textContent=String(i.value.length)",[{'kind':'text','selector':'#output','value':'4'}]),
('clear_input','clear the input value',"i.value=''",[{'kind':'value','selector':'#input','value':''}]),
('disable_input','disable the input',"i.disabled=true",[{'kind':'property','selector':'#input','name':'disabled','value':True}]),
('hide_output','hide #output using its hidden property',"o.hidden=true",[{'kind':'property','selector':'#output','name':'hidden','value':True}]),
('toggle_class','toggle class active on #output',"o.classList.toggle('active')",[{'kind':'attribute','selector':'#output','name':'class','value':''}]),
('append_item','append a list item containing the input to #items',"const li=document.createElement('li'); li.textContent=i.value; document.querySelector('#items').appendChild(li)",[{'kind':'count','selector':'#items > li','value':2},{'kind':'text','selector':'#items > li:first-child','value':'Ab 9'}]),
('check','check the checkbox',"document.querySelector('#check').checked=true",[{'kind':'property','selector':'#check','name':'checked','value':True}]),
('title','set #output title to the input value',"o.title=i.value",[{'kind':'attribute','selector':'#output','name':'title','value':'Ab 9'}]),
('reverse','copy the reversed input into #output',"o.textContent=i.value.split('').reverse().join('')",[{'kind':'text','selector':'#output','value':'9 bA'}]),
('mark_empty','set #output to Empty if input is empty, otherwise Filled',"o.textContent=i.value.length ? 'Filled':'Empty'",[{'kind':'text','selector':'#output','value':'Filled'}]),
]
def dom_tasks():
tasks=[]
for name,desc,body,checks in DOM_ACTIONS:
spec={'kind':'dom','event':'click','action':name}
code="function setup() {\n const i=document.querySelector('#input'), o=document.querySelector('#output');\n document.querySelector('#action').addEventListener('click', () => { "+body+"; });\n}\n"
tasks.append(dict(difficulty='medium',spec=spec,prompt=f'Implement setup(). When #action is clicked, {desc}. Attach an event listener; do not perform the action before a click.',reference=code,fixture=DOM_FIXTURE,checks=checks,steps=[{'action':'fill','selector':'#input','value':'Ab 9'},{'action':'click','selector':'#action'},{'action':'click','selector':'#action'}]))
for name,desc,body,checks in DOM_ACTIONS[3:8]:
code="function setup() {\n const i=document.querySelector('#input'), o=document.querySelector('#output');\n i.addEventListener('input', () => { "+body+"; });\n}\n"
tasks.append(dict(difficulty='moderate',spec={'kind':'dom','event':'input','action':name},prompt=f'Implement setup(). On an input event from #input, {desc}. Use a listener, leave the initial page unchanged, and handle repeated events.',reference=code,fixture=DOM_FIXTURE,checks=checks,steps=[{'action':'set_value','selector':'#input','value':'Ab 9'},{'action':'event','selector':'#input','value':'input'}]))
return tasks
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