progressive-img/demo/index.html at master · prompteus/progressive-img · GitHub

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
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, minimum-scale=1, initial-scale=1, user-scalable=yes">

  <title>progressive-img demo</title>

  <script src="https://polyfill.io/v2/polyfill.min.js?features=IntersectionObserver"></script>

  <script src="../node_modules/@webcomponents/webcomponentsjs/webcomponents-loader.js"></script>

  <script type="module">
    import '@polymer/iron-demo-helpers/demo-pages-shared-styles'
    import '@polymer/iron-demo-helpers/demo-snippet'
    import '../progressive-img'
  </script>

  <style>
    .container {
      max-width: 100%;
      width: calc(20em + 30vw);
      margin: 5vw auto;
    }

    footer {
      padding-top: 10vw;
    }
  </style>

</head>

<body>

<div class="container">

  <noscript>
    <h1>Please enable javascript to view this demo.</h1>
  </noscript>

  <demo-snippet>
    <template>
      <progressive-img
              srcset="city.jpg"
              placeholder="city-tiny.jpg"
              alt="city scape"
              load-strategy="instant">
      </progressive-img>
    </template>
  </demo-snippet>

  <demo-snippet>
    <template>
      <progressive-img
              style="--placeholder-scale: 1.3; --transition-timing-function: ease"
              srcset="lizard.jpg 800w, lizard-medium.jpg"
              placeholder="lizard-tiny.jpg"
              alt="lizard">
      </progressive-img>
    </template>
  </demo-snippet>

  <demo-snippet>
    <template>
      <custom-style>
        <style>
          .hummingbird {
            --transition-duration: 1s;
            --placeholder-filter: blur(14px) saturate(2.4);
          }
        </style>
      </custom-style>

      <progressive-img
              class="hummingbird"
              srcset="hummingbird.jpg"
              placeholder="hummingbird-tiny.jpg"
              alt="hummingbird">
      </progressive-img>
    </template>
  </demo-snippet>

  <demo-snippet>
    <template>
      <progressive-img
              src="car.jpg"
              placeholder="car-tiny.jpg"
              alt="car"
              load-strategy="on-visible"
              intersection-margin="500px">
      </progressive-img>
    </template>
  </demo-snippet>

  <demo-snippet>
    <template>
      <progressive-img
              src="space.png"
              placeholder="space-tiny.png"
              alt="space nebula"
              load-strategy="on-visible">
      </progressive-img>
    </template>
  </demo-snippet>

  <demo-snippet>
    <template>
      <progressive-img
              src="lights-gif.gif"
              placeholder="lights-gif-tiny.jpg"
              alt="night city car lights gif">
      </progressive-img>
    </template>
  </demo-snippet>


  <footer>
    credits:
    <ul>
      <li><a href="https://commons.wikimedia.org/wiki/File:Skyscrapers_of_Shinjuku_2009_January_(revised).jpg">city scape</a></li>
      <li><a href="https://fr.wikipedia.org/wiki/Fichier:Large_Scaled_Forest_Lizard.jpg">lizard</a></li>
      <li><a href="https://commons.wikimedia.org/wiki/File:Arthur_(hi_res).jpg">hummingbird</a></li>
      <li><a href="https://www.nasa.gov/feature/goddard/2018/lagoon-nebula-visible-light-view">space nebula</a></li>
      <li><a href="https://commons.wikimedia.org/wiki/File:Midnight_Manhattan,_The_Chrysler_Building_In_New_York,_USA.gif">night city gif</a></li>
      <li>the car is original work</li>
    </ul>
  </footer>

</div>

</body>
</html>