Question

我不断收到错误消息“ Identifier'browserSync'已经被声明”，但我看不出问题出在哪里。这是我的代码

// Watch files
function watchFiles() {
    gulp.watch("*.js", gulp.series(scriptsLint, scripts, browserSyncReload));
    gulp.watch(["processHTML"], gulp.series(browserSyncReload));
  }

//Task Live Reload

function browserSync(done) {
    browserSync.init({
      server: './dist',
      port: 8080,
      ui: {
        port: 8081
      }
    })
    done()
  };

// BrowserSync Reload
function browserSyncReload(done) {
    browserSync.reload();
    done();
  }

// define complex tasks
const js = gulp.series(scriptsLint, scripts);
const build = gulp.parallel(processHTML,js);
const watch = gulp.parallel(watchFiles, browserSync);

Answer 1

您需要将函数browserSync重命名为其他名称，因为这是为BrowserSync库保留的关键字。

类似这样的东西：

// Watch files
function watchFiles() {
    gulp.watch("*.js", gulp.series(scriptsLint, scripts, reload));
    gulp.watch(["processHTML"], gulp.series(reload));
  }

//Task Live Reload

function localServer(done) {
    browserSync.init({
      server: './dist',
      port: 8080,
      ui: {
        port: 8081
      }
    })
    done()
  };

// BrowserSync Reload
function reload(done) {
    browserSync.reload();
    done();
  }

// define complex tasks
const js = gulp.series(scriptsLint, scripts);
const build = gulp.parallel(processHTML,js);
const watch = gulp.parallel(watchFiles, localServer);

Answer 2

您在第9行声明的var fs = require("fs"); var bankAccount = fs.readFileSync("bank.txt","UTF-8"); let inputString = process.argv; let action = inputString[2]; let amount = inputString[3]; const DELIMITER = ' '; if(action == "deposit"){ deposit(); }else if(action == "withdraw"){ withdraw(); }else if(action == "total"){ total(); }else if(action == "lotto"){ lotto(); }else{ console.log("Please input whether it is a deposit, withdraw, total, or you wanna try the lotto?"); } function total() { const transactions = bankAccount.split(DELIMITER) sum = 0; for(let i=0; i < transactions.length; i++){ sum+= Number(transactions[i]); } console.log(sum); } function deposit() { fs.appendFileSync("bank.txt", DELIMITER + amount); }函数在其作用域browserSync()（在第10行）中的名称与另一个变量相同，并且需要重命名。

browserSync

标识符“ browserSync”已被声明

2 个答案: