回答編集履歴
1
もっとDRYに
answer
CHANGED
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@@ -43,4 +43,49 @@
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43
43
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</script>
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44
44
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</body>
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45
45
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</html>
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46
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```
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47
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---
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48
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もっとDRYに
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49
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+
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50
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```html
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51
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<!DOCTYPE HTML>
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52
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<html lang="ja-JP">
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53
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<head>
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54
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<meta charset="UTF-8">
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55
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<title></title>
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56
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<style type="text/css">
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57
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.contents {
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58
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border: 1px solid #CCC;
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59
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height: 600px;
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60
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}
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61
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.animate {
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62
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background: red;
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63
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}
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64
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</style>
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65
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</head>
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66
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<body>
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67
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<div>
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68
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69
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<div class="contents"></div>
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70
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<div class="contents"></div>
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71
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<div class="contents"></div>
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72
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+
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73
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</div>
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74
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<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
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75
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<script type="text/javascript">
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76
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$(function () {
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77
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$(window).scroll(function () {
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78
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var selectors = $('.contents');
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79
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var scroll = $(window).scrollTop();
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80
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selectors.each(function () {
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81
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var position = $(this).offset().top - $(window).height();
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82
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if (position < scroll) {
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83
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$(this).addClass("animate");
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84
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}
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85
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});
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86
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});
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87
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});
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88
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</script>
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89
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</body>
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90
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</html>
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46
91
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```
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