在我以前的Angular6项目中,bootstrap4和媒体查询正常运行,但现在在相同的Angular6代码中却无法正常工作。
这是我的CSS代码。自从我提到max-width: 600px
以来,颜色和字体大小应该在屏幕宽度540px处改变。我不明白我的代码有什么问题。
h1{
color: red;
font-size: 30px;
}
@media screen and (max-width: 600px){
h1{
color: blue;
font-size: 20px;
}
}
下面是我的angular.json文件:
{
"$schema": "./node_modules/@angular-devkit/core/src/workspace/workspace-schema.json",
"version": 1,
"newProjectRoot": "projects",
"projects": {
"tasty-foods-app": {
"root": "",
"projectType": "application",
"prefix": "app",
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "dist/tasty-foods-app",
"index": "src/index.html",
"main": "src/main.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.app.json",
"assets": [
{
"glob": "favicon.ico",
"input": "src",
"output": "/"
},
{
"glob": "**/*",
"input": "src/assets",
"output": "/assets"
},
{
"glob": "firebase-messaging-sw.js",
"input": "src",
"output": "/"
},
{
"glob": "manifest.json",
"input": "src",
"output": "/"
}
],
"styles": [
"src/styles.css",
"node_modules/bootstrap/dist/css/bootstrap.min.css"
],
"scripts": [
"node_modules/jquery/dist/jquery.min.js",
"node_modules/popper.js/dist/umd/popper.min.js",
"node_modules/bootstrap/dist/js/bootstrap.min.js"
]
},
"configurations": {
"production": {
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
],
"optimization": true,
"outputHashing": "all",
"sourceMap": false,
"extractCss": true,
"namedChunks": false,
"aot": true,
"extractLicenses": true,
"vendorChunk": false,
"buildOptimizer": true
}
}
},
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"options": {
"browserTarget": "tasty-foods-app:build"
},
"configurations": {
"production": {
"browserTarget": "tasty-foods-app:build:production"
}
}
},
"extract-i18n": {
"builder": "@angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "tasty-foods-app:build"
}
},
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.spec.json",
"karmaConfig": "src/karma.conf.js",
"styles": [
{
"input": "styles.css"
}
],
"scripts": [],
"assets": [
{
"glob": "favicon.ico",
"input": "src/",
"output": "/"
},
{
"glob": "**/*",
"input": "src/assets",
"output": "/assets"
},
{
"glob": "firebase-messaging-sw.js",
"input": "src",
"output": "/"
},
{
"glob": "manifest.json",
"input": "src",
"output": "/"
}
]
}
},
"lint": {
"builder": "@angular-devkit/build-angular:tslint",
"options": {
"tsConfig": [
"src/tsconfig.app.json",
"src/tsconfig.spec.json"
],
"exclude": [
"**/node_modules/**"
]
}
}
}
},
"tasty-foods-app-e2e": {
"root": "e2e/",
"projectType": "application",
"architect": {
"e2e": {
"builder": "@angular-devkit/build-angular:protractor",
"options": {
"protractorConfig": "e2e/protractor.conf.js",
"devServerTarget": "tasty-foods-app:serve"
}
},
"lint": {
"builder": "@angular-devkit/build-angular:tslint",
"options": {
"tsConfig": "e2e/tsconfig.e2e.json",
"exclude": [
"**/node_modules/**"
]
}
}
}
}
}
}
答案 0 :(得分:0)
尝试:
color: blue !important;
font-size: 20px !important;
2)删除浏览器缓存