使用Flexbox制作联系表单时右侧出现多余空白问题求助

问题描述 #

我使用Flexbox制作“Contact Us”联系表单时，已将左右两侧的内层容器设置为flex:1，但表单右侧仍存在多余空白，希望通过flex:1实现左右两侧宽度均等。

原始代码 #

CSS代码 #

/* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
*/

html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
hgroup,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}

/* HTML5 display-role reset for older browsers */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
    display: block;
}

body {
    line-height: 1;

}

ol,
ul {
    list-style: none;
}

blockquote,
q {
    quotes: none;
}

blockquote:before,
blockquote:after,
q:before,
q:after {
    content: '';
    content: none;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

html {
    -webkit-box-sizing: border-box;
    /* Safari/Chrome, other WebKit */
    -moz-box-sizing: border-box;
    /* Firefox, other Gecko */
    box-sizing: border-box;
    /* Opera/IE 8+ */
    font-family: 'Roboto', sans-serif;
    font-weight: bold;
}


.contact-form {
    background-color: #569DAA;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.form-body {
    display: flex;
    background-color: white;
    border: 1px solid #999;
    border-radius: 10px;
    padding: 10px 10px;
    width: 600px;

    
}

.row {
    display: flex;
}

.left-pane, 
.right-pane {
    display: flex;
}

.leftpane-body,
.rightpane-body {
    display: flex;
    flex-direction: column;
    flex: 1;
}

HTML代码 #

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Contact Us Form</title>
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Roboto:wght@300&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="style.css">
</head>
<body>

<form class="contact-form">
    <div class="form-body">
        <div class="row">
            <div class="right-pane">
                <div class="rightpane-body">
                    <label>Address</label>
                    <a href="#">xxxx City</a>
                    <label>Email</label>
                    <a href="#">xxxxx@gmail.com</a>
                </div>
            </div>
            
            <div class="left-pane">
                <div class="leftpane-body">
                    <h2>Get in Touch</h2>
                    <input type="text" placeholder="Enter Your Name">
                    <input type="text" placeholder="Enter Your Email">
                    <textarea id="story" name="story" rows="5" cols="33" placeholder="Enter Your Query"></textarea>
                </div>
                </div>
        </div>
    </div>
    </form>
    
</body>
</html>

解决方案 #

问题核心是**flex:1加错了层级**：你给内层的leftpane-body/rightpane-body设置了flex:1，但它们的父容器left-pane/right-pane才是.row的直接flex子项，只有给这两个父容器设置flex:1，才能让它们平分.row的可用宽度。

修改后的CSS代码片段：

.left-pane, 
.right-pane {
    display: flex;
    flex: 1; /* 让左右容器平分父容器宽度 */
}

.leftpane-body,
.rightpane-body {
    display: flex;
    flex-direction: column;
    width: 100%; /* 确保内层容器占满父容器宽度 */
}

关键说明 #

1. 给left-pane和right-pane添加flex:1：它们作为.row的flex子元素，会自动平分.row的总宽度，实现左右均等。
2. 内层容器设置width:100%：让内容完全填充父容器，避免内部出现空白区域。

修改后，表单的左右两侧就会各占.form-body宽度的50%，解决右侧多余空白的问题。

内容的提问来源于stack exchange，提问作者DailyFun