我正在使用 Angular 来制作 PWA 应用程序。
发生的事情是:
发生了什么:
这是我的ngsw-config.json
{
"$schema": "../../node_modules/@angular/service-worker/config/schema.json",
"index": "/index.html",
"assetGroups": [
{
"name": "app",
"installMode": "prefetch",
"resources": {
"files": [
"/favicon.ico",
"/index.html",
"manifest.json",
"/*.css",
"/*.js"
]
}
},
{
"name": "assets",
"installMode": "lazy",
"updateMode": "prefetch",
"resources": {
"files": [
"/assets/**",
"/*.(eot|svg|cur|jpg|png|webp|gif|otf|ttf|woff|woff2|ani)"
]
}
}
]
}
{
"name": "ng-main",
"short_name": "ng-main",
"theme_color": "#1976d2",
"background_color": "#fafafa",
"display": "standalone",
"scope": "./",
"start_url": "./",
"icons": [
{
"src": "assets/icons/icon-72x72.png",
"sizes": "72x72",
"type": "image/png",
"purpose": "maskable any"
},
{
"src": "assets/icons/icon-96x96.png",
"sizes": "96x96",
"type": "image/png",
"purpose": "maskable any"
},
{
"src": "assets/icons/icon-128x128.png",
"sizes": "128x128",
"type": "image/png",
"purpose": "maskable any"
},
{
"src": "assets/icons/icon-144x144.png",
"sizes": "144x144",
"type": "image/png",
"purpose": "maskable any"
},
{
"src": "assets/icons/icon-152x152.png",
"sizes": "152x152",
"type": "image/png",
"purpose": "maskable any"
},
{
"src": "assets/icons/icon-192x192.png",
"sizes": "192x192",
"type": "image/png",
"purpose": "maskable any"
},
{
"src": "assets/icons/icon-384x384.png",
"sizes": "384x384",
"type": "image/png",
"purpose": "maskable any"
},
{
"src": "assets/icons/icon-512x512.png",
"sizes": "512x512",
"type": "image/png",
"purpose": "maskable any"
}
]
}
在花费数小时寻找解决方案之后 我注意到当我使用
ng build --configuration production
构建我的应用程序时。我的 ngsw.json
文件夹中有一个 dist
文件。
但是生成的
urls
文件中的patterns
和ngsw.json
都是空的,如下:
"assetGroups": [
{
"name": "app",
"installMode": "prefetch",
"updateMode": "prefetch",
"cacheQueryOptions": {
"ignoreVary": true
},
"urls": [],
"patterns": []
},
{
"name": "assets",
"installMode": "lazy",
"updateMode": "prefetch",
"cacheQueryOptions": {
"ignoreVary": true
},
"urls": [],
"patterns": []
}
]
当我在
assetGroups
中添加要缓存的网址并再次尝试时,应用程序运行顺利。 (请看下面的内容)
"assetGroups": [
{
"name": "app",
"installMode": "prefetch",
"updateMode": "prefetch",
"cacheQueryOptions": {
"ignoreVary": true
},
"urls": [
"/login",
"/dashboard"
],
"patterns": [
"/*.css",
"/*.js"
]
},
{
"name": "assets",
"installMode": "lazy",
"updateMode": "prefetch",
"cacheQueryOptions": {
"ignoreVary": true
},
"urls": [
"/favicon.ico",
"/index.html",
"/manifest.webmanifest",
"/ngsw.json"
],
"patterns": []
}
]
我已经向 Angular 团队报告了此事,并已确认它是 Angular 12 中的一个错误。
总之,现在,我必须通过复制
ngsw.json
文件以及 assetGroups
中的缓存网址来解决问题,在构建应用程序后,我将其 ngsw.json
复制到 dist
文件夹中。
但就我而言,
ngsw.json
中的dist/myproject
中的URL不为空,但仍处于离线模式,无法正常工作。抛出错误
错误是
ngsw.json URL: http://127.0.0.1:8080/ngsw.json?ngsw-cache-bust=0.2758348374356183
错误:net::ERR_INTERNET_DISCONNECTED 获取:ngsw-worker.js:2925 尺寸:0B 时间:3毫秒
解决所有
manifest
文件错误和警告。
如何查找
manifest
文件错误?
打开开发控制台,然后转到应用程序选项卡 > 选择左侧的清单,您将能够看到错误和警告。
并重新上传。希望它能解决离线模式问题。