Browsersync 在 CSS 注入之前重新加载页面

Question

我正在使用 Gulp、Browsersync、Sass 实现 CSS 和 Pug 实现 HTML 的构建。在编译样式和标记后，我还将样式表 <link>s 注入 HTML。

初始构建工作正常，但我在使用 Gulp 实现监视 CSS 和 HTML 文件中的更改时遇到问题。现在发生的是更改任何源文件（标记或样式表），当 Browsersync 重新加载浏览器时，我留下了一个无样式的页面，其中没有注入样式表 <head>。似乎 Browsersync 重新加载在 pug（Pug 到 HTML 编译）完成后触发，但在 sass（Sass 到 CSS 编译）完成之前，等等那就没有什么可注入的了。

主要问题：请告诉我如何在Gulp中强制执行正确的顺序。

额外问题：如何以一种在标记更改时重新加载整页但不在样式表更改时重新加载整页，而是仅注入 CSS 转换为 <head>，如 "SASS + CSS Injecting" 下的 this article and Gulp docs 所述。

这是我的代码：

gulpfile.babel.js

import gulp from "gulp";

// Gulpfile is split across multiple files located in .gulp/.
// Importing them executes them and registers appropriate tasks.
import "./gulp/browser-sync.js";
import "./gulp/inject.js";
import "./gulp/markup.js";
import "./gulp/styles.js";
import "./gulp/watch.js";


// Build all the source files.
gulp.task("build", ["markup", "styles"]);

// Default task ran when `gulp` executed with no arguments.
gulp.task("default", ["build", "browser-sync"]);

gulp/browser-sync.js

import gulp from "gulp";
import browserSync from "browser-sync";

import paths from "./paths.js";


// Running a local server, which posts live updates to connected browsers when
// any of the source files change.
gulp.task("browser-sync", ["build", "watch"], () => {
  browserSync.init({
    server: {
      baseDir: paths.global.tmp
    }
  });
});

gulp/styles.js

import gulp from "gulp";
import sass from "gulp-sass";
import sassModuleImporter from "sass-module-importer";
import sourcemaps from "gulp-sourcemaps";
import browserSync from "browser-sync";
import del from "del";

import paths from "./paths.js";


gulp.task("styles", ["clean:styles", "sass", "inject"]);


// Compiles Sass stylesheets to CSS.
gulp.task("sass", ["clean:styles"], () => {
  const SASS_OPTIONS = {
    includePaths: paths.styles.src,
    importer: sassModuleImporter()
  };

  return gulp.src(paths.styles.srcMainGlob, { base: paths.styles.src })
             .pipe(sourcemaps.init())
             .pipe(sass(SASS_OPTIONS))
             .pipe(sourcemaps.write(paths.styles.maps))
             .pipe(gulp.dest(paths.styles.tmp))
             .pipe(browserSync.stream({ match: "**/*.css" }));
});


gulp.task("clean:styles", () => {
  let pathsToDel = [paths.styles.tmp, paths.styles.dist];
  return del(pathsToDel);
});


gulp.task("watch:styles", ["styles"], () => {
  gulp.watch(paths.styles.srcAllGlob, ["styles"]);
});

gulp/markup.js

import gulp from "gulp";
import pug from "gulp-pug";
import browserSync from "browser-sync";
import del from "del";

import paths from "./paths.js";


gulp.task("markup", ["clean:markup", "pug", "inject"]);


// Compile Pug templates to HTML
gulp.task("pug", ["clean:markup"], () => {
  return gulp.src(paths.markup.srcMainGlob)
             .pipe(pug())
             .pipe(gulp.dest(paths.markup.tmp))
             .pipe(browserSync.stream());
});


gulp.task("clean:markup", () => {
  let pathsToDel = [paths.markup.tmp, paths.markup.dist];
  return del(pathsToDel);
});


gulp.task("watch:markup", ["markup"], () => {
  gulp.watch(paths.markup.srcAllGlob, ["markup"]);
});

gulp/inject.js

import gulp from "gulp";
import inject from "gulp-inject";

import paths from "./paths.js";


gulp.task("inject", ["inject:styles"]);


// Inject generated stylesheets into HTML files.
gulp.task("inject:styles", ["pug", "sass"], () => {
  let sources = gulp.src(paths.styles.tmpGlob, { read: false });

  return gulp.src(paths.markup.tmpGlob)
             .pipe(inject(sources, { relative: true }))
             .pipe(gulp.dest(paths.markup.tmp));
});

gulp/watch.js

import gulp from "gulp";


// Watching for all the changes in source files.
gulp.task("watch", ["watch:markup", "watch:styles"]);

这里是运行 gulp 后控制台的输出，并对源 Sass 文件之一进行了更改：

[BS] Access URLs:
 --------------------------------------
       Local: http://localhost:3000
    External: http://192.168.88.32:3000
 --------------------------------------
          UI: http://localhost:3001
 UI External: http://192.168.88.32:3001
 --------------------------------------
[BS] Serving files from: .tmp/
[12:00:30] Starting 'clean:styles'...
[12:00:30] Starting 'clean:markup'...
[12:00:30] Finished 'clean:markup' after 3.12 ms
[12:00:30] Starting 'pug'...
[12:00:30] Finished 'clean:styles' after 8.61 ms
[12:00:30] Starting 'sass'...
[BS] Reloading Browsers...
[BS] 1 file changed (index.html)
[12:00:30] Finished 'pug' after 72 ms
[BS] 1 file changed (main.css)
[12:00:30] Finished 'sass' after 144 ms
[12:00:30] Starting 'inject:styles'...
[12:00:30] gulp-inject 1 files into index.html.
[12:00:30] Finished 'inject:styles' after 9.67 ms
[12:00:30] Starting 'inject'...
[12:00:30] Finished 'inject' after 2.99 μs
[12:00:30] Starting 'styles'...
[12:00:30] Finished 'styles' after 2.47 μs

Answer 1

首先要做的是将 browserSync 添加到您的 inject:styles 任务中，否则在注入样式链接后它不会重新加载

// Inject generated stylesheets into HTML files.
gulp.task("inject:styles", ["pug", "sass"], () => {
  let sources = gulp.src(paths.styles.tmpGlob, { read: false });

  return gulp.src(paths.markup.tmpGlob)
         .pipe(inject(sources, { relative: true }))
         .pipe(gulp.dest(paths.markup.tmp))
         .pipe(browserSync.stream());
});

Browsersync 在 CSS 注入之前重新加载页面

Browsersync reloads the page before CSS injection

gulp

gulp-inject

browser-sync

gulp-browser-sync