准备
由于采用了vite3而不是vue-cli,所以以前的很多兼容方式都不能做。接下来就看一下vite是怎么做到低版本兼容的问题。
工具库
@vitejs/plugin-legacyds
官方唯一指定的兼容工具库,使用方式官网都有了
进阶使用
问题例子
虽然有些确实是兼容了低版本,但是,有些工具库利用了些新的特性,页面还是报错。
比如下面这个在低版本手机的报错,例子是我们这个框架中,去掉modernPolyfills:['es.array.flat-map','es.object.values'],
的兼容性:
[Vue warn]: Unhandled error during execution of watcher callback
at <VanConfig>
at <App>
[Vue warn]: Unhandled error during execution of setup function
at <VanConfig>
at <App>
Uncaught TypeError: Object.values(...).flatMap is not a function\n\t/viteTest/assets/index.44986ed0.js:46:12228\nTypeError: Object.values(...).flatMap is not a function
at getSSRHandler (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:46:12228)
at A (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:46:12422)
at Object.onChanged (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:46:13520)
at x (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:46:12476)
at callWithErrorHandling (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:4:1576)
at callWithAsyncErrorHandling (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:4:1698)
at I (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:4:17067)
at doWatch (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:4:17371)
at watch (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:4:15741)
at useColorMode (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:46:12503)
[Vue warn]: Unhandled error during execution of watcher callback
at <VanConfig>
at <App>
[Vue warn]: Unhandled error during execution of setup function
at <VanConfig>
at <App>
[Vue warn]: Unhandled error during execution of scheduler flush. This is likely a Vue internals bug. Please open an issue at https://new-issue.vuejs.org/?repo=vuejs/core
at <VanConfig>
at <App>
[Vue Router warn]: uncaught error during route navigation:
{}
Uncaught (in promise) {"name": "TypeError", "message": "Object.values(...).flatMap is not a function", "stack": "TypeError: Object.values(...).flatMap is not a function\n at getSSRHandler (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:46:12228)\n at A (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:46:12422)\n at Object.onChanged (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:46:13520)\n at x (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:46:12476)\n at callWithErrorHandling (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:4:1576)\n at callWithAsyncErrorHandling (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:4:1698)\n at I (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:4:17067)\n at doWatch (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:4:17371)\n at watch (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:4:15741)\n at useColorMode (https://test.dongguantong.com.cn/viteTest/assets/index.44986ed0.js:46:12503)"}
Unhandled promise rejection {}
解决思路
语法不支持
Object.values(...).flatMap is not a function
我们就可以从中推断出,肯定是某个库,用了高级语法,然后低版本没兼容。因为在es6以上flatMap、Object.values都是支持的,但是我们目前不知道哪个有。
具体哪个使用了哪个库不支持
然后又根据
[Vue warn]: Unhandled error during execution of watcher callback
at <VanConfig>
at <App>
可以确认,就是我们自己些的VanConfig组件有某个库不被支持了
然后我们点进去,这个库其实就只是应用到了vueUse中的useDark。
我们查历史可以得知,在安卓6左右,是没有暗黑模式这个概念的。我们把这个useDark组件去掉,再打包。重新打开,我们就确实能够在低版本手机中看到了
兼容语法
但是把某个库或者某个功能去掉,肯定是下下策,最好还是能够语法兼容。
查阅文档,其中有2个专门将高级语法转换的,是polyfills和modernPolyfills。根据文档,我们可以得知,手动将高级语法转换的方式是这样
import legacy from '@vitejs/plugin-legacy'
export default {
plugins: [
legacy({
polyfills: ['es.promise.finally', 'es/map', 'es/set'],
modernPolyfills: ['es.promise.finally']
})
]
}
但文档写得不是很好,没有具体说明polyfills和modernPolyfills的关系,我还是建议2个都写得一样。
具体有哪些可以设置的值,就是这2个仓库的值
- https://unpkg.com/browse/core-js@3.26.0/
- https://github.com/zloirock/core-js/tree/master/packages/core-js
根据报错,是少了'es.array.flat-map'
和'es.object.values'
,加上去
legacy({ //babel,兼容老浏览器,但是体积会大80%
// targets: ['defaults', 'not IE 11']
targets: ['chrome 52'],
additionalLegacyPolyfills: ['regenerator-runtime/runtime'],
renderLegacyChunks: true,
modernPolyfills:[
'es.array.flat-map',
'es.object.values'
],
polyfills: [
'es.object.values',
'es.array.flat-map'
]
})
总结
到此这篇关于vue对于低版本浏览器兼容问题的解决思路的文章就介绍到这了,更多相关vue低版本浏览器兼容内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网!