


In el-table, when the src attribute of the img tag is empty, why is the display effect inconsistent?
Apr 05, 2025 am 06:48 AMAnalysis of the difference in display effect when the src attribute of the img tag in el-table is empty
When rendering images using the el-table component of the Element UI, if the src
attribute of img
tag is empty, the display effect may be inconsistent: some browsers display placeholders for failed image loading, while others display blank. This article will explore the reasons for this difference.
Code example:
<el-table-column label="機構(gòu)名稱" prop="NAME" width="260"> <template slot-scope="scope"> <div class="logo_name"> <img src="/static/imghw/default1.png" data-src="https://img.php.cn/" class="lazy" alt="In el-table, when the src attribute of the img tag is empty, why is the display effect inconsistent?"> <div>{{scope.row.NAME}}</div> </div> </template> </el-table-column>
When scope.row.ORIGINALLOGO
is empty, src
attribute of img
tag is empty. The way browsers handle this situation is not exactly the same.
HTML standards and actual differences:
According to the HTML standard, when the src
attribute is empty or invalid, and alt
attribute is not set, the browser usually displays blank. If the alt
property is set, the text in the alt
property may be displayed, or a default placeholder icon may be displayed (for example, Chrome may display a "breaking" icon).
However, actual situations may vary according to the following factors:
- Browser Differences: Different browsers (Chrome, Firefox, Safari, etc.) may have slight differences in the implementation of HTML standards, resulting in slightly different handling of
src
being empty. - Browser version: Different versions of the same browser may also differ.
- Element UI version: Element UI's own version update may also affect the rendering results.
- CSS style: CSS style may affect the display effect when the image fails to load.
To ensure compatibility and consistency, the following measures are recommended:
- Use default image: When
ORIGINALLOGO
is empty, use a default image as the placeholder. - Set alt attribute: Even if you use the default image, it is recommended to set the
alt
attribute to provide semantic information and improve accessibility. - Conditional rendering: Use v-if or v-show to decide whether to render the
img
tag based on whetherORIGINALLOGO
exists.
Through the above methods, the inconsistent display effect caused by src
is empty can be effectively avoided, and the stability of the application and user experience can be improved.
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