回答編集履歴
2
inputのほうも記述
test
CHANGED
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@@ -45,3 +45,53 @@
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45
45
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</html>
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46
46
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47
47
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```
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48
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+
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49
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追記
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50
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51
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---
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52
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53
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mukkunさんにコメントしていただいたinputを使う方法を追記します。
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54
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55
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```HTML
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56
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57
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<!DOCTYPE html>
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58
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59
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<html>
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60
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+
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61
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<head>
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62
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63
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<meta charset="UTF-8">
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64
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65
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<title>タイトル</title>
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66
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67
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</head>
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68
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69
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<body>
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70
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71
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<form>
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72
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73
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<input type="number" max="999" id="text1">
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74
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75
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</form>
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76
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77
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<script type="text/javascript" src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
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78
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79
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<script>
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80
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81
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$('#text1').on('input', function () {
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82
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83
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if ($(this).val().length >= 4) {
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84
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85
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$(this).val($(this).val().slice(0, 3));
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86
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87
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}
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88
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89
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});
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90
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91
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</script>
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92
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93
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</body>
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94
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95
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</html>
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96
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97
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```
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1
修正
test
CHANGED
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@@ -30,7 +30,7 @@
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30
30
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31
31
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$('#text1').on('keyup', function () {
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32
32
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33
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-
if ($(this).val().length >
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33
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+
if ($(this).val().length >= 4) {
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34
34
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35
35
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$(this).val($(this).val().slice(0, 3));
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36
36
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