下面的 HTML 代码看起来像是在使用 Bootstrap ，但它不是响应式的，如果我在手机和平板电脑上使用，它应该可以响应式工作，但它在手机和平板电脑上看起来仍然像桌面 View 。
<div class="overlap"></div>
<div class="container">
<div class="row justify-content-center pb-5 pt-3" >
<div class="col-md-5 block mt-3">
<form (ngSubmit)="SearchBus(f)" #f=ngForm>
<div class="row">
<div class="form-group col-md-6">
<label>Leaving from</label>
<select (change)="leave($event)"name="leaving_form" required ngModel class="form-control form-control-sm">
<option value="">Select Place</option>
<option value="dhaka">Dhaka</option>
<option value="comilla">Comilla</option>
<option value="chittagong">Chittagong</option>
</select>
</div>
<div class="form-group col-md-6">
<label>Going To</label>
<select name="going_to" [ngModel]="place[0].key" required class="form-control form-control-sm">
<!-- <option value="1109001">Comilla</option>
<option value="1109002">Chittagong</option>
<option value="1109003">Sylet</option>
<option value="1109004">Barishal</option> -->
<option *ngFor="let p of place" [value]="p.key">{{p.value}}</option>
</select>
</div>
</div>
<div class="row">
<div class="form-group col-md-12">
<label for="">Departing On</label>
<input type="date" required class="form-control form-control-sm" ngModel name="depart_date" >
</div>
</div>
<button [disabled]="!f.valid"class="btn btn-block mt-3 btn-search btn-sm"> <i class="fas mr-2 fa-search"></i> Search Buses</button>
</form>
</div>
<div class="col-md-5 slider mt-3 ">
<img src="../assets/img/redBus-coupons-offers-1586.PNG" class="img-fluid">
</div>
</div>
</div>
如何让上面的代码响应式？
最佳答案
To ensure proper rendering and touch zooming for all devices, add the responsive viewport meta tag to your
<head>.Source: Bootstarp 4 docs
添加视口(viewport)元标记来解决这个问题:
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
谢谢!
关于html - Bootstrap 类未按预期工作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/52324681/