Responsively adjust font size for mobile devices using HTML

My application is designed to work on both Android and IOS devices. Within the app, there are WebView components that display HTML content. I have discovered the use of "em" and viewport units as well as @media queries in CSS.

As someone who is new to HTML5 and CSS3, I am seeking guidance on how to implement a responsive font size for mobile devices. I specifically need assistance with creating different font sizes for mobile phones and tablets, as well as adjusting the font size based on screen orientation (portrait vs landscape).

EDIT:

The WebView components occupy a textbox-sized area within the app and their size is variable.

androidioshtmlcssresponsive-design

Answer №1

Implementing Media Queries

HTML

<p class="fonts">Administrator</p>

Applying Media Queries

  @charset "utf-8";
    /* CSS Document */
    /* Smartphones (portrait and landscape) ----------- */
    @media only screen
    and (min-device-width : 320px)
    and (max-device-width : 480px) {
     .fonts
     {
      font-size: 75%;
     }    
    }
    /* Smartphones (landscape) ----------- */
    @media only screen
    and (min-width : 321px) {
     .fonts
     {
      font-size: 120%;
     }  
    }
    /* Smartphones (portrait) ----------- */
    @media only screen
    and (max-width : 320px) {
     .fonts
     {
      font-size: 120%;
     }  
    }
    /* iPads (portrait and landscape) ----------- */
    @media only screen
    and (min-device-width : 768px)
    and (max-device-width : 1024px) {
     .fonts
     {
      font-size: 120%;
     }    
    }
    /* iPads (landscape) ----------- */
    @media only screen
    and (min-device-width : 768px)
    and (max-device-width : 1024px)
    and (orientation : landscape) {
     .fonts
     {
      font-size: 150%;
     }    
    }
    /* iPads (portrait) ----------- */
    @media only screen
    and (min-device-width : 768px)
    and (max-device-width : 1024px)
    and (orientation : portrait) {

     .fonts
     {
      font-size: 120%;
     }  
    }
    /* Desktops and laptops ----------- */
    @media only screen
    and (min-width : 1224px) {
     .fonts
     {
      font-size: 156%;
     }    
    }
    /* Large screens ----------- */
    @media only screen
    and (min-width : 1824px) {
     .fonts
     {
      font-size: 200%;
     }    
    }
    /* iPhone 4 ----------- */
    @media
    only screen and (-webkit-min-device-pixel-ratio : 1.5),
    only screen and (min-device-pixel-ratio : 1.5) {
     .fonts
     {
      font-size: 190%;
     }    
    }

Using percentages for font size can be effective in responsive design. Feel free to adjust the values based on your design needs.

Answer №2

The easiest method is to utilize percentages or em units for dimensions. Keep the base font size set to the default of the device and adjust the rest in em.

Explore various approaches at

Answer №3

.typography
  {
    font-size: 6vw;
  }

Utilizing "VW" for responsive design.

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