Ionic中阿拉伯文本问题：修改单个字母颜色导致格式异常

Let’s break down what’s happening here first: Arabic is a right-to-left (RTL) script that relies on contextual letter shaping (initial, medial, final, isolated forms) for proper character connection. Your manual insertion of the Arabic tatweel (ـ) to force linking is the root cause of the unwanted text stretching—those tatweel characters are being treated as standalone glyphs, which adds extra, unintended spacing.

The Correct Approach: Let the Browser Handle Contextual Shaping #

You don’t need to manually add tatweel to get proper letter connection. Instead, wrap the target letter in a <span> for coloring, and ensure your container has the correct RTL direction so the browser can automatically handle Arabic’s native shaping rules.

Here’s the fixed code:

<ion-button dir="rtl">
  <span style="font-size: 30px">مَ<span style="color:red">رَ</span>جَ</span>
</ion-button>

Why This Works: #

1. dir="rtl": This tells the browser to render the text as right-to-left, which is critical for Arabic’s proper flow and contextual shaping. You can also set this on a parent container for multiple Arabic elements, or add it to your global styles if your app primarily uses Arabic.
2. No Manual Tatweel: By removing the extra tatweel characters (ـ), you let the browser’s layout engine automatically apply the correct medial form of the letter "ر" when it sits between "م" and "ج", ensuring seamless connection without unwanted spacing.
3. Targeted Coloring: The inner <span> only modifies the color of "رَ" while keeping the rest of the text’s formatting and connection intact.

Common Mistake to Avoid #

Never manually insert tatweel to force Arabic letter connection. Modern browsers (and Ionic’s underlying web view) fully support Arabic’s contextual shaping rules—manual tatweel breaks this native behavior and leads to the stretched text you saw in Output 1.

This solution will give you the clean, correctly connected text you want (matching Output 2) with the targeted letter coloring, no extra spacing included.

内容的提问来源于stack exchange，提问作者kanki66