回答編集履歴
3
文字数増加
test
CHANGED
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@@ -52,7 +52,7 @@
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52
52
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53
53
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font-size: 18px;
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54
54
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55
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-
width: 9
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55
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+
width: 190px;
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56
56
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57
57
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height: 20px;
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58
58
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@@ -66,8 +66,6 @@
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66
66
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67
67
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.twoLines {
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68
68
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69
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-
padding: 15px;
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70
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-
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71
69
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height: 40px;
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72
70
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73
71
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}
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@@ -76,8 +74,6 @@
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76
74
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77
75
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.threeLines {
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78
76
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79
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-
padding: 20px;
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80
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-
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81
77
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height: 60px;
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82
78
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83
79
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}
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@@ -240,7 +236,7 @@
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240
236
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241
237
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let num = 0;
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242
238
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243
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-
if (len <=
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239
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+
if (len <= 10) {
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244
240
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245
241
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num = br + 1
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246
242
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@@ -248,7 +244,7 @@
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248
244
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249
245
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250
246
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251
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-
if (len >
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247
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+
if (len > 10 && len <= 20) {
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252
248
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253
249
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num = br + 2
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254
250
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@@ -256,7 +252,7 @@
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256
252
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257
253
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258
254
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259
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-
if (len >
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255
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+
if (len > 20 && len <= 30) {
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260
256
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261
257
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num = br + 3
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262
258
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@@ -264,7 +260,7 @@
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264
260
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265
261
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266
262
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267
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-
if (len >
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263
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+
if (len > 30) {
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268
264
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269
265
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num = br + 4
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270
266
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2
説明追記
test
CHANGED
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@@ -6,7 +6,21 @@
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6
6
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7
7
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8
8
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9
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-
下記コードをコピペすると動きます
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9
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+
下記コードをコピペすると多分動きます。
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10
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+
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11
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+
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12
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13
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+
確認OS
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14
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15
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+
mac
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16
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17
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+
確認ブラウザ
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18
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+
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19
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+
safari
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20
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+
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21
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+
firefox
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22
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+
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23
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+
chrome
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10
24
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11
25
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12
26
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1
コード追記
test
CHANGED
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@@ -1,7 +1,311 @@
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1
1
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Javascriptを使えば可能です。
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2
2
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3
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-
改行なしの場合、改行1回の場合、改行2回の場合
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3
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+
改行なしの場合、改行1回の場合、改行2回の場合など
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4
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-
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5
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-
など
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6
4
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7
5
|
それぞれの場合に応じたclassを用意しそのclassを付けたり外したりすることで実現出来ます。
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6
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+
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7
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+
|
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8
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+
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9
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+
下記コードをコピペすると動きます
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10
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+
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11
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+
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12
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+
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13
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+
```html
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14
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+
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15
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+
<!DOCTYPE html>
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16
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+
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17
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+
<html lang="en">
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18
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+
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19
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+
|
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20
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+
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21
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+
<head>
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22
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+
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23
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+
<meta charset="UTF-8">
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24
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+
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25
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+
<meta name="viewport" content="width=device-width, initial-scale=1.0">
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26
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+
|
|
27
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+
<title>Document</title>
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|
28
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+
|
|
29
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+
<link href="https://fonts.googleapis.com/css2?family=Kosugi&display=swap" rel="stylesheet">
|
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30
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+
|
|
31
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+
<style>
|
|
32
|
+
|
|
33
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+
.a {
|
|
34
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+
|
|
35
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+
font-family: 'Kosugi', sans-serif;
|
|
36
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+
|
|
37
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+
resize: none;
|
|
38
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+
|
|
39
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+
font-size: 18px;
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|
40
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+
|
|
41
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+
width: 95px;
|
|
42
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+
|
|
43
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+
height: 20px;
|
|
44
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+
|
|
45
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+
padding: 10px;
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|
46
|
+
|
|
47
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+
line-height: 20px;
|
|
48
|
+
|
|
49
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+
}
|
|
50
|
+
|
|
51
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+
|
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52
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+
|
|
53
|
+
.twoLines {
|
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54
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+
|
|
55
|
+
padding: 15px;
|
|
56
|
+
|
|
57
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+
height: 40px;
|
|
58
|
+
|
|
59
|
+
}
|
|
60
|
+
|
|
61
|
+
|
|
62
|
+
|
|
63
|
+
.threeLines {
|
|
64
|
+
|
|
65
|
+
padding: 20px;
|
|
66
|
+
|
|
67
|
+
height: 60px;
|
|
68
|
+
|
|
69
|
+
}
|
|
70
|
+
|
|
71
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+
|
|
72
|
+
|
|
73
|
+
.fourLines {
|
|
74
|
+
|
|
75
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+
height: 80px;
|
|
76
|
+
|
|
77
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+
}
|
|
78
|
+
|
|
79
|
+
</style>
|
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80
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+
|
|
81
|
+
</head>
|
|
82
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+
|
|
83
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+
|
|
84
|
+
|
|
85
|
+
<body>
|
|
86
|
+
|
|
87
|
+
<textarea name="a" class="a"></textarea>
|
|
88
|
+
|
|
89
|
+
<script>
|
|
90
|
+
|
|
91
|
+
const textarea = document.getElementsByTagName("textarea")[0];
|
|
92
|
+
|
|
93
|
+
textarea.addEventListener("input", () => {
|
|
94
|
+
|
|
95
|
+
const text = replaceBr(textarea.value);
|
|
96
|
+
|
|
97
|
+
const target = event.currentTarget;
|
|
98
|
+
|
|
99
|
+
numOfLine(countBr(text), countLen(countBr(text), text), target);
|
|
100
|
+
|
|
101
|
+
});
|
|
102
|
+
|
|
103
|
+
|
|
104
|
+
|
|
105
|
+
const replaceBr = (value) => {
|
|
106
|
+
|
|
107
|
+
return value.replace(/\r\n/g, '\n').replace(/\r/g, '\n');
|
|
108
|
+
|
|
109
|
+
}
|
|
110
|
+
|
|
111
|
+
|
|
112
|
+
|
|
113
|
+
const countBr = (text) => {
|
|
114
|
+
|
|
115
|
+
const count = (text.match(/\n/g) || []).length;
|
|
116
|
+
|
|
117
|
+
switch (count) {
|
|
118
|
+
|
|
119
|
+
case 0:
|
|
120
|
+
|
|
121
|
+
return 0;
|
|
122
|
+
|
|
123
|
+
break;
|
|
124
|
+
|
|
125
|
+
case 1:
|
|
126
|
+
|
|
127
|
+
return 1;
|
|
128
|
+
|
|
129
|
+
break;
|
|
130
|
+
|
|
131
|
+
case 2:
|
|
132
|
+
|
|
133
|
+
return 2;
|
|
134
|
+
|
|
135
|
+
break;
|
|
136
|
+
|
|
137
|
+
case 3:
|
|
138
|
+
|
|
139
|
+
return 3;
|
|
140
|
+
|
|
141
|
+
break;
|
|
142
|
+
|
|
143
|
+
default:
|
|
144
|
+
|
|
145
|
+
return 4;
|
|
146
|
+
|
|
147
|
+
break;
|
|
148
|
+
|
|
149
|
+
}
|
|
150
|
+
|
|
151
|
+
}
|
|
152
|
+
|
|
153
|
+
|
|
154
|
+
|
|
155
|
+
const countLen = (br, text) => {
|
|
156
|
+
|
|
157
|
+
switch (br) {
|
|
158
|
+
|
|
159
|
+
case 0:
|
|
160
|
+
|
|
161
|
+
return countVal(text);
|
|
162
|
+
|
|
163
|
+
break;
|
|
164
|
+
|
|
165
|
+
case 1:
|
|
166
|
+
|
|
167
|
+
return countVal(text.split('\n')[1]);
|
|
168
|
+
|
|
169
|
+
break;
|
|
170
|
+
|
|
171
|
+
case 2:
|
|
172
|
+
|
|
173
|
+
return countVal(text.split('\n')[2]);
|
|
174
|
+
|
|
175
|
+
break;
|
|
176
|
+
|
|
177
|
+
case 3:
|
|
178
|
+
|
|
179
|
+
return countVal(text.split('\n')[3]);
|
|
180
|
+
|
|
181
|
+
break;
|
|
182
|
+
|
|
183
|
+
default:
|
|
184
|
+
|
|
185
|
+
return 0;
|
|
186
|
+
|
|
187
|
+
break;
|
|
188
|
+
|
|
189
|
+
}
|
|
190
|
+
|
|
191
|
+
}
|
|
192
|
+
|
|
193
|
+
|
|
194
|
+
|
|
195
|
+
const countVal = (text) => {
|
|
196
|
+
|
|
197
|
+
let count = 0;
|
|
198
|
+
|
|
199
|
+
for (let i = 0, maxLen = text.length; i < maxLen; i++) {
|
|
200
|
+
|
|
201
|
+
const chr = text[i];
|
|
202
|
+
|
|
203
|
+
if (chr.match(/\n/)) {
|
|
204
|
+
|
|
205
|
+
count += 0;
|
|
206
|
+
|
|
207
|
+
} else if (!chr.match(/[^\x01-\x7E]/) || !chr.match(/[^\uFF65-\uFF9F]/)) {
|
|
208
|
+
|
|
209
|
+
count += 0.5;
|
|
210
|
+
|
|
211
|
+
} else {
|
|
212
|
+
|
|
213
|
+
count += 1;
|
|
214
|
+
|
|
215
|
+
}
|
|
216
|
+
|
|
217
|
+
}
|
|
218
|
+
|
|
219
|
+
return count;
|
|
220
|
+
|
|
221
|
+
}
|
|
222
|
+
|
|
223
|
+
|
|
224
|
+
|
|
225
|
+
const numOfLine = (br, len, target) => {
|
|
226
|
+
|
|
227
|
+
let num = 0;
|
|
228
|
+
|
|
229
|
+
if (len <= 5) {
|
|
230
|
+
|
|
231
|
+
num = br + 1
|
|
232
|
+
|
|
233
|
+
}
|
|
234
|
+
|
|
235
|
+
|
|
236
|
+
|
|
237
|
+
if (len > 5 && len <= 10) {
|
|
238
|
+
|
|
239
|
+
num = br + 2
|
|
240
|
+
|
|
241
|
+
}
|
|
242
|
+
|
|
243
|
+
|
|
244
|
+
|
|
245
|
+
if (len > 10 && len <= 15) {
|
|
246
|
+
|
|
247
|
+
num = br + 3
|
|
248
|
+
|
|
249
|
+
}
|
|
250
|
+
|
|
251
|
+
|
|
252
|
+
|
|
253
|
+
if (len > 15) {
|
|
254
|
+
|
|
255
|
+
num = br + 4
|
|
256
|
+
|
|
257
|
+
}
|
|
258
|
+
|
|
259
|
+
judgeLine(num, target);
|
|
260
|
+
|
|
261
|
+
}
|
|
262
|
+
|
|
263
|
+
|
|
264
|
+
|
|
265
|
+
const judgeLine = (num, target) => {
|
|
266
|
+
|
|
267
|
+
if (num == 1) {
|
|
268
|
+
|
|
269
|
+
target.classList.remove("twoLines");
|
|
270
|
+
|
|
271
|
+
target.classList.remove("threeLines");
|
|
272
|
+
|
|
273
|
+
target.classList.remove("fourLines");
|
|
274
|
+
|
|
275
|
+
}
|
|
276
|
+
|
|
277
|
+
if (num == 2) {
|
|
278
|
+
|
|
279
|
+
target.classList.add("twoLines");
|
|
280
|
+
|
|
281
|
+
target.classList.remove("threeLines");
|
|
282
|
+
|
|
283
|
+
target.classList.remove("fourLines");
|
|
284
|
+
|
|
285
|
+
}
|
|
286
|
+
|
|
287
|
+
if (num == 3) {
|
|
288
|
+
|
|
289
|
+
target.classList.add("threeLines");
|
|
290
|
+
|
|
291
|
+
target.classList.remove("fourLines");
|
|
292
|
+
|
|
293
|
+
}
|
|
294
|
+
|
|
295
|
+
if (num > 3) {
|
|
296
|
+
|
|
297
|
+
target.classList.add("fourLines");
|
|
298
|
+
|
|
299
|
+
}
|
|
300
|
+
|
|
301
|
+
}
|
|
302
|
+
|
|
303
|
+
</script>
|
|
304
|
+
|
|
305
|
+
</body>
|
|
306
|
+
|
|
307
|
+
|
|
308
|
+
|
|
309
|
+
</html>
|
|
310
|
+
|
|
311
|
+
```
|