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Expand file tree Collapse file tree Original file line number Diff line number Diff line change 1+ <!DOCTYPE html>
2+ < html lang ="en ">
3+ < head >
4+ < meta charset ="UTF-8 ">
5+ < title > Scoped CSS Variables and JS</ title >
6+ </ head >
7+ < body >
8+ < h2 > Update CSS Variables with < span class ='hl '> JS</ span > </ h2 >
9+
10+ < div class ="controls ">
11+ < label for ="spacing "> Spacing:</ label >
12+ < input id ="spacing " type ="range " name ="spacing " min ="10 " max ="200 " value ="10 " data-sizing ="px ">
13+
14+ < label for ="blur "> Blur:</ label >
15+ < input id ="blur " type ="range " name ="blur " min ="0 " max ="25 " value ="10 " data-sizing ="px ">
16+
17+ < label for ="base "> Base Color</ label >
18+ < input id ="base " type ="color " name ="base " value ="#ffc600 ">
19+ </ div >
20+
21+ < img src ="https://source.unsplash.com/7bwQXzbF6KE/800x500 ">
22+
23+ < style >
24+ : root {
25+ --base : # f02c02 ;
26+ --spacing : 5px ;
27+ --blur : 5px ;
28+ }
29+
30+ img {
31+ background : var (--base );
32+ padding : var (--spacing );
33+ filter : blur (var (--blur ));
34+ }
35+
36+ .hl {
37+ color : var (--base );
38+ }
39+ /*
40+ misc styles, nothing to do with CSS variables
41+ */
42+
43+ body {
44+ text-align : center;
45+ background : # 193549 ;
46+ color : white;
47+ font-family : 'helvetica neue' , sans-serif;
48+ font-weight : 100 ;
49+ font-size : 50px ;
50+ }
51+
52+ .controls {
53+ margin-bottom : 50px ;
54+ }
55+
56+ input {
57+ width : 100px ;
58+ }
59+ </ style >
60+
61+ < script >
62+ const inputs = document . querySelectorAll ( '.controls input' ) ;
63+
64+ function handleUpdate ( ) {
65+ const suffix = this . dataset . sizing || '' ;
66+ document . documentElement . style . setProperty ( `--${ this . name } ` , this . value + suffix ) ;
67+ }
68+
69+ inputs . forEach ( input => input . addEventListener ( 'change' , handleUpdate ) ) ;
70+ inputs . forEach ( input => input . addEventListener ( 'mousemove' , handleUpdate ) ) ;
71+ </ script >
72+
73+ </ body >
74+ </ html >
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