The width of emsp spaces in HTML is inconsistent. How to reliably implement text indentation?

emsp space width inconsistency problem in HTML and reliable text indentation solution

Many web tutorials mention that emsp ( ) occupies the width of a Chinese character, but this is not the case. This article will analyze this problem in depth and provide a more reliable method for text indentation.

Problem: Using emsp to implement text indentation is not always reliable. The following example tries to use emsp to achieve indentation of the width of two Chinese characters:

<div class="content">
    <p>Comrade Li Fei:</p>
    <p>  Participated in the 2022 Cadre Online Learning Center online training and completed the compulsory study hours.</p>
    <p>  Hereby prove</p>
</div>

However, the actual effect may not be the expected width of the two Chinese characters. This is because the width of emsp is affected by the font. The character widths of widening fonts (such as Song font and Kai font) are different, resulting in differences in the actual width of emsp and the width of Chinese characters. The browser may also merge consecutive spaces, causing the display result to be inconsistent with expectations.

Solution: Avoid using multiple emsp to implement text indentation, and it is recommended to use text-indent attribute of CSS. text-indent can accurately control the indentation amount of the first line of text, and is not affected by font and space processing, thereby more effectively controlling text layout.

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