Understanding of CSS properties-webkit-tap-highlight-color

1.-webkit-tap-highlight-color
This property is only available on iOS (iPhone and iPad). When you click on a link or clickable element defined through Javascript, it will appear with a semi-transparent gray background. To reset this behavior, you can set -webkit-tap-highlight-color to any color.
To disable this highlighting, set the color's alpha value to 0.
Example: Set the highlight color to 50% transparent red:

<code>-webkit-tap-highlight-color: rgba(255,0,0,0.5);</code>

Browser support: iOS (iPhone and iPad) only.
2.-webkit-text-size-adjust

Some font sizes render larger on Safari (iPhone)

<code>示例：-webkit-text-size-adjust: none;</code>

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