标签：javascript css-transitions webpack vue-js vuejs2
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
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。