詳解Grunt插件之LiveReload實(shí)現(xiàn)頁(yè)面自動(dòng)刷新（兩種方案），gruntlivereload
Jun 13, 2016 am 08:56 AM
詳解Grunt插件之LiveReload實(shí)現(xiàn)頁(yè)面自動(dòng)刷新（兩種方案），gruntlivereload
方案一：grunt-livereload + Chrome Plug-in
優(yōu)點(diǎn)：安裝、配置簡(jiǎn)單方便。
缺點(diǎn)：需要配合指定的瀏覽器插件（Firefox也有相關(guān)插件，IE么你懂的）。
1. 需要安裝2個(gè)插接件：grunt-contrib-watch、connect-livereload
執(zhí)行命令：
復(fù)制代碼 代碼如下:
npm install --save-dev grunt-contrib-watch connect-livereload
2. 安裝瀏覽器插件：Chrome LiveReload
3. 配置一個(gè)Web服務(wù)器（IIS/Apache），LiveReload需要在本地服務(wù)器環(huán)境下運(yùn)行（對(duì)file:///文件路徑支持并不是很好）。
4. 修改Gruntfile.js文件：
module.exports = function(grunt) {
// 項(xiàng)目配置(任務(wù)配置)
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
watch: {
client: {
files: ['*.html', 'css/*', 'js/*', 'images/**/*'],
options: {
livereload: true
}
}
}
});
// 加載插件
grunt.loadNpmTasks('grunt-contrib-watch');
// 自定義任務(wù)
grunt.registerTask('live', ['watch']);
};
5. 執(zhí)行：grunt live
看到如下提示，說(shuō)明已經(jīng)開(kāi)始監(jiān)聽(tīng)任務(wù)：
復(fù)制代碼 代碼如下:
Running "watch" task
Waiting...
6. 打開(kāi)我們的頁(yè)面，例如：http://localhost/
7. 再點(diǎn)擊Chrome LiveReload插件的ICON，此時(shí)ICON圓圈中心的小圓點(diǎn)變成實(shí)心的，說(shuō)明插件執(zhí)行成功。此時(shí)你改下網(wǎng)站文件看看，是不是實(shí)時(shí)更新了？
方案二：grunt-contrib-watch + grunt-contrib-connect + grunt-livereload
優(yōu)點(diǎn)：自動(dòng)搭建靜態(tài)文件服務(wù)器，不需在自己電腦上搭建Web服務(wù)器。
不需要瀏覽器插件的支持（不現(xiàn)定于某個(gè)瀏覽器）。
不需要給網(wǎng)頁(yè)手動(dòng)添加livereload.js。
缺點(diǎn)：對(duì)于剛接觸的人，配置略顯復(fù)雜。
1. 安裝我們所需要的3個(gè)插件：grunt-contrib-watch、grunt-contrib-connect、connect-livereload
執(zhí)行命令：
復(fù)制代碼 代碼如下:
npm install --save-dev grunt-contrib-watch grunt-contrib-connect connect-livereload
2. 修改Gruntfile.js文件：
module.exports = function(grunt) {
// LiveReload的默認(rèn)端口號(hào)，你也可以改成你想要的端口號(hào)
var lrPort = 35729;
// 使用connect-livereload模塊，生成一個(gè)與LiveReload腳本
// <script src="http://127.0.0.1:35729/livereload.js?snipver=1" type="text/javascript"></script>
var lrSnippet = require('connect-livereload')({ port: lrPort });
// 使用 middleware(中間件)，就必須關(guān)閉 LiveReload 的瀏覽器插件
var lrMiddleware = function(connect, options) {
return [
// 把腳本，注入到靜態(tài)文件中
lrSnippet,
// 靜態(tài)文件服務(wù)器的路徑
connect.static(options.base[0]),
// 啟用目錄瀏覽(相當(dāng)于IIS中的目錄瀏覽)
connect.directory(options.base[0])
];
};
// 項(xiàng)目配置(任務(wù)配置)
grunt.initConfig({
// 讀取我們的項(xiàng)目配置并存儲(chǔ)到pkg屬性中
pkg: grunt.file.readJSON('package.json'),
// 通過(guò)connect任務(wù)，創(chuàng)建一個(gè)靜態(tài)服務(wù)器
connect: {
options: {
// 服務(wù)器端口號(hào)
port: 8000,
// 服務(wù)器地址(可以使用主機(jī)名localhost，也能使用IP)
hostname: 'localhost',
// 物理路徑(默認(rèn)為. 即根目錄) 注：使用'.'或'..'為路徑的時(shí)，可能會(huì)返回403 Forbidden. 此時(shí)將該值改為相對(duì)路徑 如：/grunt/reloard。
base: '.'
},
livereload: {
options: {
// 通過(guò)LiveReload腳本，讓頁(yè)面重新加載。
middleware: lrMiddleware
}
}
},
// 通過(guò)watch任務(wù)，來(lái)監(jiān)聽(tīng)文件是否有更改
watch: {
client: {
// 我們不需要配置額外的任務(wù)，watch任務(wù)已經(jīng)內(nèi)建LiveReload瀏覽器刷新的代碼片段。
options: {
livereload: lrPort
},
// '**' 表示包含所有的子目錄
// '*' 表示包含所有的文件
files: ['*.html', 'css/*', 'js/*', 'images/**/*']
}
}
}); // grunt.initConfig配置完畢
// 加載插件
grunt.loadNpmTasks('grunt-contrib-connect');
grunt.loadNpmTasks('grunt-contrib-watch');
// 自定義任務(wù)
grunt.registerTask('live', ['connect', 'watch']);
};
5. 執(zhí)行：grunt live
看到如下提示，說(shuō)明Web服務(wù)器搭建完成，并且開(kāi)始監(jiān)聽(tīng)任務(wù)：
復(fù)制代碼 代碼如下:
Running "connect:livereload" (connect) task
Started connect web server on 127.0.0.1:8000.
Running "watch" task
Waiting...
注：執(zhí)行該命令前，如果你有安裝過(guò)LiveReload的瀏覽器插件，必須關(guān)閉。
6. 打開(kāi)我們的頁(yè)面，例如：http://localhost:8000/ 或 http://127.0.0.1:8000/
注：這里所打開(kāi)的本地服務(wù)器地址，是我們剛才通過(guò)connect所搭建的靜態(tài)文件服務(wù)器地址，而不是之前你用IIS或Apache自己搭建Web服務(wù)器地址。
以上就是本文詳解Grunt插件之LiveReload實(shí)現(xiàn)頁(yè)面自動(dòng)刷新（兩種方案），希望大家喜歡。
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