http://prntscr.com/8qa833我花了超过4-5个小时尝试不同的方法...但这不是我唯一的问题，我不能让输入[type = date]元素改变，宽度100％没有在改变屏幕尺寸时似乎会影响它。如果我找不到解决方案，我将不得不放弃并使其固定大小。
HTML
<center>
<div id="signup-form" style="/*display:none;*/">
<form method="post">
<table width="30%" align="center" border="0" style="max-width:570px;">
<tbody>
<tr>
<td colspan="2">
<input type="text" name="uname" placeholder="Username" required="" id="username" pattern=".{4,25}" title="Username must be 4-25 characters long" maxlength="25" oninput="usernamecheck()">
<p id="usernameerror" class="error"></p>
</td>
</tr>
<tr>
<td colspan="2">
<input type="email" name="email" placeholder="Email" required="" id="email" oninput="emailcheck()" class="failed">
<p id="emailerror" class="error">This is not a valid email.</p>
</td>
</tr>
<tr>
<td colspan="2">
<input type="password" name="pass" placeholder="Password" required="" id="password" pattern=".{6,50}" title="Password must be 6-50 characters long" maxlength="50" oninput="passwordcheck()" class="failed">
<p id="passworderror" class="error">Password must be atleast 6 characters!</p>
</td>
</tr>
<tr>
<td>
<input type="text" name="firstname" placeholder="First Name" required="" id="firstname">
<p id="firstnameerror" class="error"></p>
</td>
<td>
<input type="text" name="lastname" placeholder="Last Name" required="" id="lastname">
<p id="lastnameerror" class="error"></p>
</td>
</tr>
<tr>
<td>
<select id="country" name="country" required="" title="Please Select a Country.">
<option value="" disabled="" selected="">Country</option>
<option value="AF">Afghanistan</option>
<option value="AX">Åland Islands</option>
<option value="AL">Albania</option>
<option value="DZ">Algeria</option>
<option value="AS">American Samoa</option>
<option value="AD">Andorra</option>
<option value="AO">Angola</option>
<option value="AI">Anguilla</option>
<option value="AQ">Antarctica</option>
<option value="AG">Antigua and Barbuda</option>
<option value="AR">Argentina</option>
<option value="AM">Armenia</option>
<option value="AW">Aruba</option>
<option value="AU">Australia</option>
<option value="AT">Austria</option>
<option value="AZ">Azerbaijan</option>
<option value="BS">Bahamas</option>
<option value="BH">Bahrain</option>
<option value="BD">Bangladesh</option>
<option value="BB">Barbados</option>
<option value="BY">Belarus</option>
<option value="BE">Belgium</option>
<option value="BZ">Belize</option>
<option value="BJ">Benin</option>
<option value="BM">Bermuda</option>
<option value="BT">Bhutan</option>
<option value="BO">Bolivia, Plurinational State of</option>
<option value="BQ">Bonaire, Sint Eustatius and Saba</option>
<option value="BA">Bosnia and Herzegovina</option>
<option value="BW">Botswana</option>
<option value="BV">Bouvet Island</option>
<option value="BR">Brazil</option>
<option value="IO">British Indian Ocean Territory</option>
<option value="BN">Brunei Darussalam</option>
<option value="BG">Bulgaria</option>
<option value="BF">Burkina Faso</option>
<option value="BI">Burundi</option>
<option value="KH">Cambodia</option>
<option value="CM">Cameroon</option>
<option value="CA">Canada</option>
<option value="CV">Cape Verde</option>
<option value="KY">Cayman Islands</option>
<option value="CF">Central African Republic</option>
<option value="TD">Chad</option>
<option value="CL">Chile</option>
<option value="CN">China</option>
<option value="CX">Christmas Island</option>
<option value="CC">Cocos (Keeling) Islands</option>
<option value="CO">Colombia</option>
<option value="KM">Comoros</option>
<option value="CG">Congo</option>
<option value="CD">Congo, the Democratic Republic of the</option>
<option value="CK">Cook Islands</option>
<option value="CR">Costa Rica</option>
<option value="CI">Côte dIvoire</option>
<option value="HR">Croatia</option>
<option value="CU">Cuba</option>
<option value="CW">Curaçao</option>
<option value="CY">Cyprus</option>
<option value="CZ">Czech Republic</option>
<option value="DK">Denmark</option>
<option value="DJ">Djibouti</option>
<option value="DM">Dominica</option>
<option value="DO">Dominican Republic</option>
<option value="EC">Ecuador</option>
<option value="EG">Egypt</option>
<option value="SV">El Salvador</option>
<option value="GQ">Equatorial Guinea</option>
<option value="ER">Eritrea</option>
<option value="EE">Estonia</option>
<option value="ET">Ethiopia</option>
<option value="FK">Falkland Islands (Malvinas)</option>
<option value="FO">Faroe Islands</option>
<option value="FJ">Fiji</option>
<option value="FI">Finland</option>
<option value="FR">France</option>
<option value="GF">French Guiana</option>
<option value="PF">French Polynesia</option>
<option value="TF">French Southern Territories</option>
<option value="GA">Gabon</option>
<option value="GM">Gambia</option>
<option value="GE">Georgia</option>
<option value="DE">Germany</option>
<option value="GH">Ghana</option>
<option value="GI">Gibraltar</option>
<option value="GR">Greece</option>
<option value="GL">Greenland</option>
<option value="GD">Grenada</option>
<option value="GP">Guadeloupe</option>
<option value="GU">Guam</option>
<option value="GT">Guatemala</option>
<option value="GG">Guernsey</option>
<option value="GN">Guinea</option>
<option value="GW">Guinea-Bissau</option>
<option value="GY">Guyana</option>
<option value="HT">Haiti</option>
<option value="HM">Heard Island and McDonald Islands</option>
<option value="VA">Holy See (Vatican City State)</option>
<option value="HN">Honduras</option>
<option value="HK">Hong Kong</option>
<option value="HU">Hungary</option>
<option value="IS">Iceland</option>
<option value="IN">India</option>
<option value="ID">Indonesia</option>
<option value="IR">Iran, Islamic Republic of</option>
<option value="IQ">Iraq</option>
<option value="IE">Ireland</option>
<option value="IM">Isle of Man</option>
<option value="IL">Israel</option>
<option value="IT">Italy</option>
<option value="JM">Jamaica</option>
<option value="JP">Japan</option>
<option value="JE">Jersey</option>
<option value="JO">Jordan</option>
<option value="KZ">Kazakhstan</option>
<option value="KE">Kenya</option>
<option value="KI">Kiribati</option>
<option value="KP">Korea, Democratic Peoples Republic of</option>
<option value="KR">Korea, Republic of</option>
<option value="KW">Kuwait</option>
<option value="KG">Kyrgyzstan</option>
<option value="LA">Lao Peoples Democratic Republic</option>
<option value="LV">Latvia</option>
<option value="LB">Lebanon</option>
<option value="LS">Lesotho</option>
<option value="LR">Liberia</option>
<option value="LY">Libya</option>
<option value="LI">Liechtenstein</option>
<option value="LT">Lithuania</option>
<option value="LU">Luxembourg</option>
<option value="MO">Macao</option>
<option value="MK">Macedonia, the former Yugoslav Republic of</option>
<option value="MG">Madagascar</option>
<option value="MW">Malawi</option>
<option value="MY">Malaysia</option>
<option value="MV">Maldives</option>
<option value="ML">Mali</option>
<option value="MT">Malta</option>
<option value="MH">Marshall Islands</option>
<option value="MQ">Martinique</option>
<option value="MR">Mauritania</option>
<option value="MU">Mauritius</option>
<option value="YT">Mayotte</option>
<option value="MX">Mexico</option>
<option value="FM">Micronesia, Federated States of</option>
<option value="MD">Moldova, Republic of</option>
<option value="MC">Monaco</option>
<option value="MN">Mongolia</option>
<option value="ME">Montenegro</option>
<option value="MS">Montserrat</option>
<option value="MA">Morocco</option>
<option value="MZ">Mozambique</option>
<option value="MM">Myanmar</option>
<option value="NA">Namibia</option>
<option value="NR">Nauru</option>
<option value="NP">Nepal</option>
<option value="NL">Netherlands</option>
<option value="NC">New Caledonia</option>
<option value="NZ">New Zealand</option>
<option value="NI">Nicaragua</option>
<option value="NE">Niger</option>
<option value="NG">Nigeria</option>
<option value="NU">Niue</option>
<option value="NF">Norfolk Island</option>
<option value="MP">Northern Mariana Islands</option>
<option value="NO">Norway</option>
<option value="OM">Oman</option>
<option value="PK">Pakistan</option>
<option value="PW">Palau</option>
<option value="PS">Palestinian Territory, Occupied</option>
<option value="PA">Panama</option>
<option value="PG">Papua New Guinea</option>
<option value="PY">Paraguay</option>
<option value="PE">Peru</option>
<option value="PH">Philippines</option>
<option value="PN">Pitcairn</option>
<option value="PL">Poland</option>
<option value="PT">Portugal</option>
<option value="PR">Puerto Rico</option>
<option value="QA">Qatar</option>
<option value="RE">Réunion</option>
<option value="RO">Romania</option>
<option value="RU">Russian Federation</option>
<option value="RW">Rwanda</option>
<option value="BL">Saint Barthélemy</option>
<option value="SH">Saint Helena, Ascension and Tristan da Cunha</option>
<option value="KN">Saint Kitts and Nevis</option>
<option value="LC">Saint Lucia</option>
<option value="MF">Saint Martin (French part)</option>
<option value="PM">Saint Pierre and Miquelon</option>
<option value="VC">Saint Vincent and the Grenadines</option>
<option value="WS">Samoa</option>
<option value="SM">San Marino</option>
<option value="ST">Sao Tome and Principe</option>
<option value="SA">Saudi Arabia</option>
<option value="SN">Senegal</option>
<option value="RS">Serbia</option>
<option value="SC">Seychelles</option>
<option value="SL">Sierra Leone</option>
<option value="SG">Singapore</option>
<option value="SX">Sint Maarten (Dutch part)</option>
<option value="SK">Slovakia</option>
<option value="SI">Slovenia</option>
<option value="SB">Solomon Islands</option>
<option value="SO">Somalia</option>
<option value="ZA">South Africa</option>
<option value="GS">South Georgia and the South Sandwich Islands</option>
<option value="SS">South Sudan</option>
<option value="ES">Spain</option>
<option value="LK">Sri Lanka</option>
<option value="SD">Sudan</option>
<option value="SR">Suriname</option>
<option value="SJ">Svalbard and Jan Mayen</option>
<option value="SZ">Swaziland</option>
<option value="SE">Sweden</option>
<option value="CH">Switzerland</option>
<option value="SY">Syrian Arab Republic</option>
<option value="TW">Taiwan, Province of China</option>
<option value="TJ">Tajikistan</option>
<option value="TZ">Tanzania, United Republic of</option>
<option value="TH">Thailand</option>
<option value="TL">Timor-Leste</option>
<option value="TG">Togo</option>
<option value="TK">Tokelau</option>
<option value="TO">Tonga</option>
<option value="TT">Trinidad and Tobago</option>
<option value="TN">Tunisia</option>
<option value="TR">Turkey</option>
<option value="TM">Turkmenistan</option>
<option value="TC">Turks and Caicos Islands</option>
<option value="TV">Tuvalu</option>
<option value="UG">Uganda</option>
<option value="UA">Ukraine</option>
<option value="AE">United Arab Emirates</option>
<option value="GB">United Kingdom</option>
<option value="US">United States</option>
<option value="UM">United States Minor Outlying Islands</option>
<option value="UY">Uruguay</option>
<option value="UZ">Uzbekistan</option>
<option value="VU">Vanuatu</option>
<option value="VE">Venezuela, Bolivarian Republic of</option>
<option value="VN">Viet Nam</option>
<option value="VG">Virgin Islands, British</option>
<option value="VI">Virgin Islands, U.S.</option>
<option value="WF">Wallis and Futuna</option>
<option value="EH">Western Sahara</option>
<option value="YE">Yemen</option>
<option value="ZM">Zambia</option>
<option value="ZW">Zimbabwe</option>
</select>
<p id="countryerror" class="error"></p>
</td>
<td>
<input type="date" name="age" placeholder="Age" required="" id="age" pattern="" value="" title="You must be 18 years of age or older." oninput="agecheck()">
<p id="ageerror" class="error"></p>
</td>
</tr>
<tr>
<td colspan="2">
<button type="submit" name="btn-signup" id="confirmsignup">Sign Me Up</button>
</td>
</tr>
</tbody>
</table>
</form>
</div>
</center>
CSS
@charset "utf-8";
CSS Document * {
margin: 0;
padding: 0;
}
#login-form {
margin-top: 70px;
}
table {
border: solid #dcdcdc 1px;
padding: 25px;
box-shadow: 0px 0px 1px rgba(0, 0, 0, 0.2);
}
table tr,td {
padding: 10px;//
border: solid #e1e1e1 1px;
}
table tr td input {
width: 100%;
height: 45px;
border: solid #e1e1e1 1px;
border-radius: 3px;
padding-left: 10px;
font-family: Verdana, Geneva, sans-serif;
font-size: 16px;
background: #f9f9f9;
transition-duration: 0.5s;
box-shadow: inset 0px 0px 1px rgba(0, 0, 0, 0.4);
}
table tr td button {
width: 100%;
height: 45px;
border: 0px;
background: rgba(12, 45, 78, 11);
background: -moz-linear-gradient(top, #595959, #515151);
border-radius: 3px;
box-shadow: 1px 1px 1px rgba(1, 0, 0, 0.2);
color: #f9f9f9;
font-family: Verdana, Geneva, sans-serif;
font-size: 18px;
font-weight: bolder;
text-transform: uppercase;
}
table tr td button:active {
position: relative;
top: 1px;
}
table tr td a {
text-decoration: none;
color: #00a2d1;
font-family: Verdana, Geneva, sans-serif;
font-size: 18px;
}
/* css for home page */
* {
margin: 0;
padding: 0;
}
#header {
width: 100%;
height: 60px;
background: rgba(00, 11, 22, 33);
color: #9fa8b0;
font-family: Verdana, Geneva, sans-serif;
}
#header #left {
float: left;
position: relative;
}
#header #left label {
position: relative;
top: 5px;
left: 100px;
font-size: 35px;
}
#header #right {
float: right;
position: relative;
}
#header #right #content {
position: relative;
top: 20px;
right: 100px;
color: #fff;
}
#header #right #content a {
color: #00a2d1;
}
/* css for home page */
#country {
/* width:100%; */
height: 45px;
border: solid #e1e1e1 1px;
border-radius: 3px;
padding-left: 10px;
font-family: Verdana, Geneva, sans-serif;
font-size: 16px;
background: #f9f9f9;
transition-duration: 0.5s;
box-shadow: inset 0px 0px 1px rgba(0, 0, 0, 0.4);
max-width: 215px;
margin-right: 25px;
}
#age {
width: 100%;
/* max-width: 203px; */
}
#username {
/* width: 98%; */
}
#email {
/* width: 98%; */
}
#password {
/* width: 98%; */
}
input[type=date] {
width: 100%;
height: 45px;
border: solid #e1e1e1 1px;
border-radius: 3px;
padding-left: 10px;
font-family: Verdana, Geneva, sans-serif;
font-size: 16px;
background: #f9f9f9;
transition-duration: 0.5s;
box-shadow: inset 0px 0px 1px rgba(0, 0, 0, 0.4);
}
.error {
color: red!important;
font-family: sans-serif!important;
text-align: center;
position: relative;
top: 15px;
}
button#confirmsignup[disabled] {
background-color: grey;
cursor: not-allowed;
}
这个元素是否有某种默认样式我忘记覆盖它完全弄乱了它？
答案 0 :(得分：0)
我想通了，我错过了<select>标签框大小调整的默认CSS标签：border-box;我需要盒子大小：内容框;
答案 1 :(得分：0)
我不确定是什么搞砸了，因为我没有看到一个“功能正常”的例子。并且＆＃39;不正确＆＃39;比较。此外，似乎因为元素设置为100％，并且未设置tr样式单独宽度，它将仅仅是日期控件的宽度，因此它的行为方式也是如此。可能看起来很愚蠢，但你是否尝试使用重要的覆盖参数：width = 100％！重要或更好使用固定大小，并设置最大和最小宽度，如下所示：
table tr td input {
width: 100% !important;
height: 45px;
border: solid #e1e1e1 1px;
border-radius: 3px;
padding-left: 10px;
font-family: Verdana, Geneva, sans-serif;
font-size: 16px;
background: #f9f9f9;
transition-duration: 0.5s;
box-shadow: inset 0px 0px 1px rgba(0, 0, 0, 0.4);
}
！important属性值告诉它忽略来自其他元素或heiarchy的任何继承值或优先级。我找到了它的用途，但主要是在进入已经创建的项目时，设计布局不适合我们需要的东西。建造不好，或没想到。无论如何，看看是否有帮助。