Text Ellipsis Implementation Techniques in Mobile Development

In mobile development, when text content is too long to fit within the display area due to screen size limitations, it is common to show ellipsis (...) for overflowed text. This article summarizes various approaches to implement text ellipsis functionality.

The most basic requirement is single-line text ellipsis, which can be achieved using CSS alone. For multi-line text ellipsis, CSS -webkit-line-clamp property can be used, though it has compatibility limitations with webkit browsers and older devices.

When product requirements become more sophisticated, such as displaying ellipsis only when text exceeds half of a specific line, developers need to calculate the actual text width using Canvas API's measureText() method. This approach works well for text without special characters or English words, as browser rendering may differ from canvas calculations.

For advanced requirements like adding icons at the beginning or end of text, or configuring buttons after ellipsis, existing components like HeyUI and vue-text-ellipsis can be utilized. These components determine whether to truncate text based on whether the actual rendered height exceeds the container's expected height.

For text highlighting requirements, where different parts of text need different highlight styles, the approach involves using different HTML tags to wrap highlighted text. However, when using v-html with ellipsis components, special handling is needed to avoid truncating HTML tag characters during the text reduction process.