回答編集履歴
2
修正
test
CHANGED
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@@ -132,7 +132,7 @@
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132
132
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133
133
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function setErrorMessage(selector, string) {
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134
134
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135
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-
$(selector).next('.error-message').text(string).sh
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135
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+
$(selector).next('.error-message').text(string).removeClass('hide');
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136
136
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137
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}
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138
138
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1
追記
test
CHANGED
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@@ -13,3 +13,167 @@
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13
13
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この場合、$('.vali_name')の後ろにerror_message を追加しているだけ。
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14
14
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15
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すでに存在しているかいないかを判定していないので、何個でも追加されてしまっているのです。
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16
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19
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---
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20
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21
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22
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23
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JavaScriptを書きやすくHTMLを作るのも大切です。
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24
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25
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26
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27
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```html
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28
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29
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<!DOCTYPE html>
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30
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31
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<html lang="ja">
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32
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33
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<head>
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34
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<meta charset="UTF-8"/>
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36
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<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
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<meta http-equiv="X-UA-Compatible" content="ie=edge"/>
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40
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41
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42
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43
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<!-- js -->
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45
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
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46
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47
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<script src="./js/post_customer.js" charset="utf-8"></script>
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48
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49
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<style>
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50
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51
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.hide {
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53
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display: none;
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54
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55
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}
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56
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57
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</style>
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58
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59
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</head>
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60
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61
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<body>
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62
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63
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<header></header>
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66
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<main id="main" class="post_area">
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68
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<form class="post_form" action="confirm.php" method="post">
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70
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<!-- 名前 -->
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<div class="item">
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75
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<label class="label_block" for="name">
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<i class="fas fa-hand-point-right icon"></i>
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お名前<span class="required">必須</span>
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</label>
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<input id="name"
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class="inputs vali_name"
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86
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type="text"
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name="name"
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autocomplete="off"/>
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<span class="error-message hide">error</span>
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95
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</div>
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98
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99
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<!-- 送信、リセットボタン -->
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100
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<div class="btn_area">
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<input id="form_btn" type="submit" value="送信する"/>
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105
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<input type="reset" value="リセット"/>
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107
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</div>
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108
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109
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</form>
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110
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111
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</main>
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112
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113
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114
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115
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<footer></footer>
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116
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117
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</body>
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118
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119
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</html>
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120
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121
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```
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123
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125
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```javascript
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126
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127
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$(function () {
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128
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129
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130
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131
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132
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133
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function setErrorMessage(selector, string) {
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134
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135
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$(selector).next('.error-message').text(string).show();
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136
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137
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}
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138
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139
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140
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141
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$("form.post_form").on('submit', function (e) {
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142
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143
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144
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145
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let error = 0;
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146
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147
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148
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149
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let error_message = '必須項目です';
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150
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151
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let error_num = '半角数字のみです';
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152
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153
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154
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155
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// 名前
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156
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157
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if ($(".vali_name").val() == "") {
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158
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159
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error++;
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160
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161
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setErrorMessage('.vali_name', error_message);
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162
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163
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}
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164
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165
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166
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167
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if (error) {
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168
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169
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return false;
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170
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171
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}
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172
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});
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175
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176
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177
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});
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178
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179
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```
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