Question

我正在使用 yargs 为传递给脚本的参数添加命令行选项。当我与脚本名称一起发出help命令时，它不会显示 add 参数的帮助。

const yargs=require('yargs');
 const argv= yargs.command('add', 'ADD A NOTE TO A FILE', {
    title : {
        describe : 'title of the file',
        demand: 'true'
    }
})
.help()
.argv;




root# node mainFile_node.js --help
Options:
  --help     Show help                                                 [boolean]
  --version  Show version number

     node mainFile_node.js add
YARGS ARGV:-{ _: [ 'add' ], '$0': 'mainFile_node.js' }

Answer 1

const yargs = require("yargs");

yargs.command({
  command: "add",
  describe: "Add new note",
  builder: {
    title: {
      // describe: 'note title',
      demandOption: true,
      type: "string"
    }
  },
  handler: function(argv) {
    console.log("My title: " + argv.title);
  }
});

yargs.parse();

然后在命令行中运行：

node filename.js add --title="title name"

Answer 2

尝试以下代码

ab -n 9 -c 3 https://nr41lkw95j.sse.codesandbox.io/test

然后使用以下命令执行

received request:  10
received request:  11
received request:  12
sent response:  10
sent response:  11
sent response:  12
received request:  13
received request:  14
received request:  15
sent response:  13
sent response:  14
sent response:  15
received request:  16
received request:  17
received request:  18
sent response:  16
sent response:  17
sent response:  18

Answer 3

const yargs=require('yargs');
const argv= yargs.command('add', 'ADD A NOTE TO A FILE', {
    title : {
        describe : 'title of the file',
        demand: 'true'
    }
}).parse()

u必须在末尾添加parse（）方法。如果您将来会使用u，则parse（）还将执行处理程序函数。

或根据代码

console.log(yargs.argv)

如果您没有在文件上编写任何代码，而是在命令行上工作，则此方法很有用。假设

节点app.js添加--title =“ somthing”-帮助

要查看帮助菜单，您必须在文件上键入console.log(yargs.argv)。

Answer 4

首先检查节点./main.js --h是否正常工作？

然后，仅在单独的js文件上运行node ./app.js --help，然后它将开始在先前的文件上工作。

const chalk = require('chalk');
const yargs = require('yargs');

//Create add command
yargs.command({
    command:'add',
    describe:'Add a new note',
    handler:function(){
        console.log("add a new note");
    }
})

//Create remove command
yargs.command({
    command:'remove',
    describe:'Remove the note',
    handler:function(){
        console.log("Removing a note");
    }
})

//Create list command
yargs.command({
    command:'list',
    describe:'List all the notes',
    handler:function(){
        console.log("List notes");
    }
})

//Create read command
yargs.command({
    command:'read',
    describe:'read note',
    handler:function(){
        console.log("read a note");
    }
})


console.log(yargs.argv)

Answer 5

添加 yargs.parse（）；到文件末尾，以使yargs使用其预定义的args，例如--help，-version。

Yargs帮助未显示所有帮助选项

5 个答案: