html - 关于 Bootstrap 崩溃的问题及其对 DOM 的影响

Question

我在我的网页中使用 Bootstrap 。现在我想实现一个特定的效果。我有一个类名为“container-fluid”的 div 和下面有文本的 h2 标签。就像下面这样:

<div class="container-fluid" style="background-color: #f8f8f8;text-align: center;height: 76px;">
    <br>
    <h2 id="mesheading" style="color: #a76281; font-size: 14px; cursor: pointer; margin-top: -4px; font-family: 'brandon_grotesquebold'; text-transform: uppercase; letter-spacing: 2px;">
        Helping manufacturers save 20%-30% of the store cost &nbsp;
        <span>
            <button class="button_one" type="button" onclick="open_win_two()">
                LEARN MORE
            </button>
        </span>
    </h2><br>
</div>

我的要求是，当浏览器窗口折叠时，h2 标签的字体大小会变小。例如它将变为 10px。

并且在以实际大小扩展浏览器窗口时，它将移回其原始字体大小，即 14px

我对 jQuery 的崩溃相关事件做了很多研究。但这对我没有帮助。

所以请帮助我实现这一目标。

提前致谢!!!

Answer 1

问题

根据屏幕尺寸更改元素的 css。

解决方案

您可以使用媒体查询来更改您的 h2 或任何元素的字体大小。

示例

使用此媒体查询为您在查询中提供的两个宽度之间的任何内容设置条件。您可以重用它来创建多个场景，只需更改 min 和 max width 的宽度即可。

 @media only screen and (min-device-width: 481px) and (max-device-width: 1024px) {
      .container-fluid h2 {
         font-size: 10px;
}
    }

然后在媒体查询之外，您可以将此作为任何不属于您的任何媒体查询条件的默认值。

.container-fluid h2 {
    font-size: 14px;
}

针对特定设备

以下是针对流行设备的一些更常见的必要媒体查询。

/* Smartphones (portrait and landscape) ----------- */
@media only screen and (min-device-width : 320px) and (max-device-width : 480px) {
/* Styles */
}

/* Smartphones (landscape) ----------- */
@media only screen and (min-width : 321px) {
/* Styles */
}

/* Smartphones (portrait) ----------- */
@media only screen and (max-width : 320px) {
/* Styles */
}

/* iPads (portrait and landscape) ----------- */
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) {
/* Styles */
}

/* iPads (landscape) ----------- */
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : landscape) {
/* Styles */
}

/* iPads (portrait) ----------- */
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : portrait) {
/* Styles */
}
/**********
iPad 3
**********/
@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : landscape) and (-webkit-min-device-pixel-ratio : 2) {
/* Styles */
}

@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) and (orientation : portrait) and (-webkit-min-device-pixel-ratio : 2) {
/* Styles */
}
/* Desktops and laptops ----------- */
@media only screen  and (min-width : 1224px) {
/* Styles */
}

/* Large screens ----------- */
@media only screen  and (min-width : 1824px) {
/* Styles */
}

/* iPhone 4 ----------- */
@media only screen and (min-device-width : 320px) and (max-device-width : 480px) and (orientation : landscape) and (-webkit-min-device-pixel-ratio : 2) {
/* Styles */
}

@media only screen and (min-device-width : 320px) and (max-device-width : 480px) and (orientation : portrait) and (-webkit-min-device-pixel-ratio : 2) {
/* Styles */
}

/* iPhone 5 ----------- */
@media only screen and (min-device-width: 320px) and (max-device-height: 568px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

@media only screen and (min-device-width: 320px) and (max-device-height: 568px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

/* iPhone 6 ----------- */
@media only screen and (min-device-width: 375px) and (max-device-height: 667px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

@media only screen and (min-device-width: 375px) and (max-device-height: 667px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

/* iPhone 6+ ----------- */
@media only screen and (min-device-width: 414px) and (max-device-height: 736px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

@media only screen and (min-device-width: 414px) and (max-device-height: 736px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

/* Samsung Galaxy S3 ----------- */
@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 2){
/* Styles */
}

/* Samsung Galaxy S4 ----------- */
@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 3){
/* Styles */
}

@media only screen and (min-device-width: 320px) and (max-device-height: 640px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 3){
/* Styles */
}

/* Samsung Galaxy S5 ----------- */
@media only screen and (min-device-width: 360px) and (max-device-height: 640px) and (orientation : landscape) and (-webkit-device-pixel-ratio: 3){
/* Styles */
}

@media only screen and (min-device-width: 360px) and (max-device-height: 640px) and (orientation : portrait) and (-webkit-device-pixel-ratio: 3){
/* Styles */
}