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Learn about robotics and automated production in JavaScriptNov 03, 2023 am 10:21 AM
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Learn about robotics and automated production in JavaScript

With the continuous development and advancement of technology, more and more automation tools and robots are used in all walks of life. In the field of JavaScript, robots and automated production are not uncommon. This article will introduce you to robotics and automated production in JavaScript, and provide some concrete code examples to help you better understand this area.

1. Robot

In the world of JavaScript, a robot can be defined as a program that can automatically perform some specific tasks. These tasks can be very simple, such as basic file operations, or very complex, such as simulating humans to perform some more complex operations. The most common tool for implementing bots in JavaScript is Puppeteer in Node.js.

  1. Puppeteer introduction

Puppeteer is a tool developed by Google and based on Node.js. It can be used to manipulate the Chrome browser or Chromium to perform tasks such as automation Testing, website crawling, PDF generation and other tasks. Using Puppeteer allows us to comprehensively control and analyze the page DOM and network requests in the Chrome browser, allowing us to perform some advanced web page operations and data capture.

  1. Puppeteer Usage Example

Let’s look at a simple Puppeteer usage example, which can open a web page and capture pictures of the web page:

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://www.baidu.com/');
  await page.screenshot({path: 'example.png'});
  await browser.close();
})();

In this code, we first introduce the Puppeteer library, and then create a browser instance through the puppeteer.launch() method. Next, we create a new page through the browser.newPage() method. Then, we call the page.goto() method to load the Baidu homepage, the page.screenshot() method to intercept the picture of the web page, and save the picture as example.png . Finally, we call the browser.close() method to close the browser instance.

2. Automated production

In JavaScript, automated production can be defined as the process of automating certain tasks by writing scripts. These tasks can be performed manually, such as manually testing a website or compiling a project, or they can be computational tasks that computers can complete automatically.

  1. Grunt Introduction

Grunt is a JavaScript build tool that can perform many tasks through simple configuration, such as compiling code, merging files, compressing code, etc. The core idea of ​​Grunt is to complete automated production through tasks. An example of a Grunt task could be to compile a sass file:

module.exports = function(grunt) {
  grunt.initConfig({
    sass: {
      dist: {
        files: {
          'css/main.css': 'sass/main.scss'
        }
      }
    },
  });
  grunt.loadNpmTasks('grunt-sass');
  grunt.registerTask('default', ['sass']);
};

In this example, we use Grunt to compile the sass file. First, a task named sass is set up in the grunt.initConfig() method. This task is responsible for packaging and compiling the main.scss file and outputting it to main.css file, then load the grunt-sass plug-in through the grunt.loadNpmTasks() method, and finally use the grunt.registerTask() method Register the sass task as the default task.

  1. Gulp introduction

Gulp is a flow-based build tool. Unlike Grunt, the core idea of ​​Gulp is to build processes through JavaScript code, which makes it more flexible and easier to use. Like Grunt, Gulp also has many plugins that can be used to perform various tasks. The following is an example of compiling a sass file through Gulp:

const gulp = require('gulp');
const sass = require('gulp-sass');

gulp.task('sass', function() {
  return gulp.src('sass/main.scss')
    .pipe(sass())
    .pipe(gulp.dest('css'));
});

gulp.task('default', gulp.series('sass'));

In this code, we first define a file named sass## through the gulp.task() method #The task is responsible for compiling the main.scss file into the main.css file. The gulp-sass plug-in is used here for compilation. The gulp.src() method specifies the file to be compiled, and the .pipe() method passes it to the gulp-sass plugin for processing. Finally, use the gulp.dest() method to store the compiled files in the css directory. The sass task can be registered as the default task through the gulp.series() method.

Summary

This article introduces robots and automated production in JavaScript and provides some concrete code examples. Robots and production automation play an important role in both modern software development and website maintenance. They can help us automate repetitive tasks to increase work efficiency and reduce the risk of errors. If you're new to this field, try the examples above to get started!

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