javascript – 移除Vue JS中的元素在dev中工作但不在prod中的动画
作者：互联网
使用CSS转换我有一个组件,只要值发生变化就会有动画.
当我使用npm run dev运行时,整个过程看起来很好看,如下所示：
但是,当使用npm run build并在Nginx服务器上生成代码时,动画不起作用,并且元素只是被删除,非常快：
什么导致dev和prod之间的这种差异？有没有更好的方法来获得这种动画效果？
BugRepro.vue,我用它来重现这个bug：
<template>
<div class="bugrepro">
<div class="empty-space"></div>
<Value :value="someNumber"></Value>
<button @click="change()">Change it!</button>
</div>
</template>
<script>
import Value from "./Value"
export default {
name: "BugRepro",
data() {
return {
someNumber: 20
};
},
components :{
Value
},
methods: {
change() {
this.someNumber += 1;
}
}
};
</script>
<style>
.empty-space {
margin-top: 100px;
}
</style>
Value.vue,当值发生变化时,它持有数字并负责处理动画：
<template>
<div class="card-property">
<button class="btn btn-sm active fa" :class="`btn-info fa-tint`" style="cursor:default" title="Mana Cost">
{{ value }}
</button>
<transition-group name="diff-once" class="pos-absolute" tag="div" @after-enter="removeDiff()">
<button v-for="diff in diffs" :key="diff.id"
class="btn btn-sm active fa diff-once" :class="`btn-info fa-tint`" style="cursor:default">
{{diff.value}}
</button>
</transition-group>
</div>
</template>
<script>
export default {
name: "Value",
props: ["value"],
data() {
return {
diffs: [],
diffId: 0
};
},
methods: {
removeDiff() {
this.diffs.splice(0, 1);
}
},
watch: {
value: function(newValue, oldValue) {
console.log(typeof newValue);
let diff = newValue - oldValue;
this.diffs.push({value: diff, id: this.diffId});
this.diffId++;
}
}
}
</script>
<style>
.card-property {
position: relative;
}
.diff-once-leave-active {
transition: all 1s;
position: absolute;
}
.pos-absolute {
position: absolute;
top: 0;
left: 0;
}
.diff-once-leave {
opacity: 1;
}
.diff-once-leave-to {
opacity: 0;
transform: translateY(-30px);
}
</style>
我已经考虑过问题可能出在我的webpack.prod.conf中,我已经尝试过禁用OptimizeCSSPlugin但没有帮助：
'use strict'
const path = require('path')
const utils = require('./utils')
const webpack = require('webpack')
const config = require('../config')
const merge = require('webpack-merge')
const baseWebpackConfig = require('./webpack.base.conf')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
const env = process.env.NODE_ENV === 'testing'
? require('../config/test.env')
: require('../config/prod.env')
const webpackConfig = merge(baseWebpackConfig, {
module: {
rules: utils.styleLoaders({
sourceMap: config.build.productionSourceMap,
extract: true,
usePostCSS: true
})
},
devtool: config.build.productionSourceMap ? config.build.devtool : false,
output: {
path: config.build.assetsRoot,
filename: utils.assetsPath('js/[name].[chunkhash].js'),
chunkFilename: utils.assetsPath('js/[id].[chunkhash].js')
},
plugins: [
// http://vuejs.github.io/vue-loader/en/workflow/production.html
new webpack.DefinePlugin({
'process.env': env
}),
new UglifyJsPlugin({
uglifyOptions: {
compress: {
warnings: false
}
},
sourceMap: config.build.productionSourceMap,
parallel: true
}),
// extract css into its own file
new ExtractTextPlugin({
filename: utils.assetsPath('css/[name].[contenthash].css'),
// Setting the following option to `false` will not extract CSS from codesplit chunks.
// Their CSS will instead be inserted dynamically with style-loader when the codesplit chunk has been loaded by webpack.
// It's currently set to `true` because we are seeing that sourcemaps are included in the codesplit bundle as well when it's `false`,
// increasing file size: https://github.com/vuejs-templates/webpack/issues/1110
allChunks: true,
}),
// Compress extracted CSS. We are using this plugin so that possible
// duplicated CSS from different components can be deduped.
new OptimizeCSSPlugin({
cssProcessorOptions: config.build.productionSourceMap
? { safe: true, map: { inline: false } }
: { safe: true }
}),
// generate dist index.html with correct asset hash for caching.
// you can customize output by editing /index.html
// see https://github.com/ampedandwired/html-webpack-plugin
new HtmlWebpackPlugin({
filename: process.env.NODE_ENV === 'testing'
? 'index.html'
: config.build.index,
template: 'index.html',
inject: true,
minify: {
removeComments: true,
collapseWhitespace: true,
removeAttributeQuotes: true
// more options:
// https://github.com/kangax/html-minifier#options-quick-reference
},
// necessary to consistently work with multiple chunks via CommonsChunkPlugin
chunksSortMode: 'dependency'
}),
// keep module.id stable when vendor modules does not change
new webpack.HashedModuleIdsPlugin(),
// enable scope hoisting
new webpack.optimize.ModuleConcatenationPlugin(),
// split vendor js into its own file
new webpack.optimize.CommonsChunkPlugin({
name: 'vendor',
minChunks (module) {
// any required modules inside node_modules are extracted to vendor
return (
module.resource &&
/\.js$/.test(module.resource) &&
module.resource.indexOf(
path.join(__dirname, '../node_modules')
) === 0
)
}
}),
// extract webpack runtime and module manifest to its own file in order to
// prevent vendor hash from being updated whenever app bundle is updated
new webpack.optimize.CommonsChunkPlugin({
name: 'manifest',
minChunks: Infinity
}),
// This instance extracts shared chunks from code splitted chunks and bundles them
// in a separate chunk, similar to the vendor chunk
// see: https://webpack.js.org/plugins/commons-chunk-plugin/#extra-async-commons-chunk
new webpack.optimize.CommonsChunkPlugin({
name: 'app',
async: 'vendor-async',
children: true,
minChunks: 3
}),
// copy custom static assets
new CopyWebpackPlugin([
{
from: path.resolve(__dirname, '../static'),
to: config.build.assetsSubDirectory,
ignore: ['.*']
}
])
]
})
if (config.build.productionGzip) {
const CompressionWebpackPlugin = require('compression-webpack-plugin')
webpackConfig.plugins.push(
new CompressionWebpackPlugin({
asset: '[path].gz[query]',
algorithm: 'gzip',
test: new RegExp(
'\\.(' +
config.build.productionGzipExtensions.join('|') +
')$'
),
threshold: 10240,
minRatio: 0.8
})
)
}
if (config.build.bundleAnalyzerReport) {
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
webpackConfig.plugins.push(new BundleAnalyzerPlugin())
}
module.exports = webpackConfig
因为我不知道哪些文件是相关的,you can also find all files on github
最简单的重现步骤：
>签出源代码,运行npm install和npm run dev
>转到http://localhost:42637并单击按钮 – 动画正常工作
>停止开发服务器并运行npm run build
>在某些HTTP服务器上托管文件,如Nginx
>转到托管文件的HTTP服务器并单击按钮 – 动画无效
一旦我知道哪些文件最相关,我当然会将它们添加到这篇文章中.
解决方法:
问题是,一旦你编译成生产,Bootstrap和你的组件的所有CSS文件合并为一个,并通过一些CSS优化运行.这会导致CSS样式定义多个点的过渡.有你的.diff-once -…样式,还有你的.btn样式.在DEV模式下,.diff-once -…在级联中更高,在生产中,它是.btn.因此,按钮中的转换规则会覆盖您稍后定义的所有规则.您可以通过提高动画类的特异性来解决这个问题
.btn.diff-once-leave-to { ... }
.btn.diff-once-leave { ... }
或者(推荐)添加范围样式.这样,默认情况下,所有动画样式都会获得更高的特异性,并且不会干扰应用中的任何其他样式：
<style scoped>
.card-property {
position: relative;
}
.diff-once-leave-active {
transition: all 1s;
position: absolute;
}
.pos-absolute {
position: absolute;
top: 0;
left: 0;
}
.diff-once-leave {
opacity: 1;
}
.diff-once-leave-to {
opacity: 0;
transform: translateY(-30px);
}
</style>
希望这可以帮助！
标签：javascript,css-transitions,webpack,vue-js,vuejs2 来源： https://codeday.me/bug/20190611/1215959.html