What is the reason why Vue.js dynamic style fails in the WeChat applet web-view?

In the Vue.js project, the dynamic style attribute is used to control element displacement. The browser runs normally, but it fails in the WeChat applet web-view . What is the reason?

This article takes a carousel diagram component as an example. This component dynamically controls the horizontal displacement of carousel__slides element by transform: translateX(-${slideWidth * currentIndex1}px) to achieve carousel effect. It runs normally in the browser environment, but it fails in the WeChat applet web-view .

The problem is not that web-view does not support transform attributes, the key lies in web-view environment limitations or conflicts with the Vue.js rendering mechanism. web-view is essentially an embedded browser, but it is different from a normal browser:

• CSS rendering differences: web-view 's CSS rendering engine may have subtle differences from the browser environment used by the Vue.js project, resulting in style resolution or application problems. The calculation differences between vw units on different devices also need to be considered.
• JavaScript execution environment: The JavaScript execution environment of web-view is different from that of ordinary browsers. The internal mechanism of Vue.js may be limited, affecting dynamic style attribute updates.
• Data binding problem: The update mechanisms of slideWidth and currentIndex1 need to be carefully checked to ensure that the data is correctly updated in the Vue.js instance and is reflected in style attribute in real time.
• web-view configuration: web-view component configuration (such as dom-mainfest ) may affect rendering capabilities. You need to check whether the configuration is correct and whether CSS style or JavaScript functions are limited.

Solution:

• Check data binding: Use browser debugging tools or WeChat developer tools to monitor the values ​​of slideWidth and currentIndex1 to ensure that they are updated correctly.
• Simplified code: Try to use static style attributes for displacement testing to exclude interference from other factors.
• Use class name switching: Consider using class name switching to achieve displacement effect instead of dynamic style attributes, which may be more reliable.
• Optimize style: Ensure that transform attribute is written intact and includes all browser prefixes (although the code snippet is included, it needs to be confirmed again). For example: -webkit-transform: translateX(-${slideWidth * currentIndex1}px); transform: translateX(-${slideWidth * currentIndex1}px);
• Check web-view configuration: Double-check the configuration of web-view component to make sure there are no restrictions on the relevant CSS styles or JavaScript features.

By gradually checking the above aspects, you can find the root cause of the failure of dynamic style displacement in web-view .

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