作为javascript开发,css引入的方式有哪些? link和@import的区别是?


在JavaScript中,引入CSS的方式主要有两种:`<link>`标签和`@import`规则。 1. `<link>`标签:这是最常用的引入CSS的方式。在HTML文件中,使用`<link>`标签可以将CSS文件引入到当前文档中。例如: ```html <link rel="stylesheet" href="style.css"> ``` 其中,`rel`属性指定链接的类型,`href`属性指定CSS文件的URL。 2. `@import`规则:这是CSS3引入的一种引入CSS的方式。在CSS文件中,可以使用`@import`规则引入其他CSS文件。例如: ```css @import url(style.css); ``` 需要注意的是,`@import`规则只能在外部样式表中使用,不能在内联样式中使用。 `<link>`标签和`@import`规则的主要区别是: 1. 异步加载:`<link>`标签支持异步加载,即在CSS文件下载完成之前,浏览器可以继续渲染页面。而`@import`规则只能同步加载,即在CSS文件下载完成之前,浏览器会阻塞渲染页面。 2. 优先级:`<link>`标签的优先级比`@import`规则高。如果在HTML文件中同时使用了`<link>`标签和`@import`规则引入CSS文件,那么`<link>`标签引入的CSS文件会被优先应用。 3. 加载顺序:`<link>`标签的加载顺序是从上到下,即按照HTML文件中`<link>`标签出现的顺序进行加载。而`@import`规则的加载顺序是从左到右,即按照CSS文件中`@import`规则出现的顺序进行加载。 [2023-11-09 00:58:25 | AI写代码神器 | 363点数解答]
- import javax.swing.*; import java.awt.*; import java.awt.datatransfer.clipboard; import java.awt.datatransfer.stringselection; import java.awt.datatransfer.transferable; import java.awt.event.*; import java.io.*; import java.nio.file.files; import java.nio.file.path; import java.nio.file.paths; import java.time.localdatetime; import java.util.hashmap; import java.util.list; import java.util.map; import java.util.random; public class copy { static private final jtextarea textarea = new jtext(1497点数解答 | 2024-08-25 09:40:33)325
- import openpyxl import smtplib import imaplib import email import json import os import re from bs4 import BeautifulSoup from fastapi import FastAPI, Form from openpyxl.styles import Alignment from email.mime.multipart import MIMEMultipart from email.mime.base import MIMEBase from email.header import decode_header from email import encoders import pandas as pd app = FastAPI() RECEIVER_EMAILS = { 0: "yundongshijie001@protonmail.com", 1: "xiaobudian001@protonmail.com" } email_address = "(182点数解答 | 2025-04-12 00:49:09)165
- from kivy.app import app from kivy.uix.button import button from kivy.uix.boxlayout import boxlayout from kivy.uix.filechooser import filechooserlistview from kivy.uix.popup import popup from kivy.uix.label import label from kivy.uix.screenmanager import screenmanager, screen from kivy.core.window import window from kivy.uix.treeview import treeview, treeviewlabel from unitypy import assetsmanager from unitypy.exceptions import unitypyerror import os from pil import image import time class file(262点数解答 | 2024-12-01 17:07:07)218
- package com.example.weather; import android.content.context; import android.media.mediaplayer; import android.net.uri; import android.os.bundle; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.webkit.websettings; import android.webkit.webview; import android.webkit.webviewclient; import android.widget.videoview; import androidx.fragment.app.fragment; public class realtimemonitoringfragment extends fragment {(30点数解答 | 2024-10-12 10:31:18)229
- package com.example.weather; import android.content.context; import android.media.mediaplayer; import android.net.uri; import android.os.bundle; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.webkit.websettings; import android.webkit.webview; import android.webkit.webviewclient; import android.widget.videoview; import androidx.fragment.app.fragment; public class realtimemonitoringfragment extends fragment {(531点数解答 | 2024-10-12 10:32:25)207
- import os import datetime from flask import Flask, request, jsonify import requests from flask_cors import CORS import re import matplotlib matplotlib.use('Agg') import matplotlib.pyplot as plt import numpy as np import base64 from io import BytesIO import pandas as pd import traceback # 添加traceback以获取详细错误信息 plt.rcParams["font.sans-serif"] = ["SimHei"] app = Flask(__name__) CORS(app) FASTGPT_API_URL = 'http://localhost:3000/api/v1/chat/completions' FASTGPT_API_KEY = 'fastgpt-gWzitHpBa8XRr0q(713点数解答 | 2025-06-18 16:00:34)120
- import mysql.connector from database import Database # 引入 Database 类 from flask import Flask, render_template, request, redirect, url_for, flash, session, jsonify import pymysql from pymysql import Error import json from datetime import datetime app = Flask(__name__) app.secret_key = 'your_secret_key' # 用于闪现消息 # 定义饮食偏好和口味的映射关系 DIET_PREFERENCE_MAPPING = { 1: "低脂", 2: "高蛋白", 3: "素食", 4: "无糖", 5: "低盐", 6: "高纤维" } TASTE_PREFERENCE_MAPPING = { 1: "甜", 2: "咸", 3(33点数解答 | 2025-05-12 22:13:16)99
- <!doctype html> <html> <head> <title> <#web_title#> - <#menu5_4#> </title> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="expires" content="-1"> <link rel="shortcut icon" href="images/favicon.ico"> <link rel="icon" href="images/favicon.png"> <link rel="stylesheet" type="text/css" href="/bootstrap/css/bootstrap.min.css"> <link rel="stylesheet" type="text/css" href="/b(51点数解答 | 2024-12-09 20:31:23)250
- package com.bjrl.matrix.controller; import com.bjrl.common.annotation.Log; import com.bjrl.common.core.controller.BaseController; import com.bjrl.common.core.domain.AjaxResult; import com.bjrl.common.core.domain.entity.AccountNumberInfo; import com.bjrl.common.core.domain.entity.MatrixAncestors; import com.bjrl.common.core.page.TableDataInfo; import com.bjrl.common.enums.BusinessType; import com.bjrl.common.utils.poi.ExcelUtil; import com.bjrl.matrix.domain.PrintConfig; import com.bjrl.matrix.d(698点数解答 | 2025-09-15 10:13:12)41
- <!doctype html> <html lang="zh-cn"> <head> <meta charset="utf-8"> <title>帝王尬笑的博客</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta name="description" content="帝王尬笑的个人博客,分享技术、项目和生活点滴。"> <!-- 引用外部css --> <link rel="stylesheet" href="css/styles.css"> <!-- 引用 aos css --> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/aos/2.3.4/aos.css"> <!-- 引用 font awesome (用于图标) --> <link rel="stylesheet" href="https://cd(86点数解答 | 2024-11-16 02:59:47)231
- import numpy as np import matplotlib.pyplot as plt from scipy.stats import chi2 import pandas as pd import itertools from statsmodels.stats.outliers_influence import variance_inflation_factor from sklearn.impute import SimpleImputer # 用于简单缺失值填充 import plotly.graph_objects as go from plotly.subplots import make_subplots plt.rcParams['font.sans-serif'] = ['SimHei'] # 用来正常显示中文标签 plt.rcParams['axes.unicode_minus'] = False # 用来正常显示负号 # 问题背景与意义说明 # 在生产过程中,产品可能会出现多种类型的缺陷,通过对不同缺陷类型的频数分布进行监控, # 可以及时发(925点数解答 | 2025-04-05 17:47:55)137
- <!doctype html> <html lang="zh"> <head> <meta charset="utf-8"> <link rel="stylesheet" href="css/mian.css"> <link rel="stylesheet" href="css/index.css"> <script src="js/jquery-3.3.1.min.js"></script> <script src="js/jquery-ui.min.js"></script> <script type="text/javascript"> // (1)创建js函数,使用jquery动画,实现ready事件 $(document). ____(1)____ (function(){ //ready事件 $('li').each(function(index){ //遍历对象 $(this).hover(function(){ //单击触发事件 $('li').animate({ width:100 },500); //删除当前元素的样式 $('li').eq(index).animate({ width:200 },500); }); }); }); </script> <title>首页</title> </head> <body> <header> <div class="logo"> <img src="img/logo.jpg" width="250" height="60"> </div> <form class="searchform"> <input type="text" name="search" id="search"/> <input type="submit" value="搜索" id="button"/> </form> <div class="navigation"> <a href="#">手机</a> | <a(475点数解答 | 2024-12-19 14:58:05)267