How to wrap line in nodejs

Node.js is a popular back-end development language and runtime environment. When writing Node.js code, we may encounter situations where line breaks are required. So, how to wrap lines in Node.js? This article will explain it to you in detail.

1. Use escape characters in strings

In Node.js, we can use escape characters to achieve line breaks. For example, use "
" to represent a newline character.

Sample code:

console.log('这是第一行
这是第二行');

Running results:

这是第一行
这是第二行

2. Using newlines in files

In Node.js, We can create a string containing newlines and write it to a file. In this way, you can see the effect of newlines when reading the file.

Sample code:

const fs = require('fs');

const content = '这是第一行
这是第二行';

fs.writeFile('test.txt', content, (err) => {
  if (err) throw err;
  console.log('文件已被保存');
});

Run result:

文件已被保存

When reading the file, also remember to use the escape character "
" to identify the newline character, example The code is as follows:

const fs = require('fs');

fs.readFile('test.txt', 'utf8', (err, data) => {
  if (err) throw err;
  console.log(data);
});

Running result:

这是第一行
这是第二行

3. Using template string

In Node.js, we can use template string to achieve Line break. In a template string, we can use backticks `` to enclose the string, and then use ${} to insert variables or expressions. Template strings automatically preserve the effect of newlines.

Sample code:

const str = `这是第一行
这是第二行`;

console.log(str);

Running results:

这是第一行
这是第二行

4. Use newlines in console output

In Node.js , we can also use newlines in console output. This can be achieved by setting the first parameter of console.log(). When we use multiple parameters in console.log(), Node.js automatically adds a space between them, so a newline character is required in the first parameter.

Sample code:

console.log('这是第一行
', '这是第二行');

Running result:

这是第一行
 这是第二行

Summary:

There are many ways to achieve line breaks in Node.js, including in strings Use escape characters, "
" or use template strings, etc. You can also use newlines in files or in console output. We can choose a method that suits us based on specific needs and scenarios.

The above is the detailed content of How to wrap line in nodejs. For more information, please follow other related articles on the PHP Chinese website!