Example _ Javascript tips-js tutorial

This article describes how to write and read txt files in Javascript. For more information, see section 1. Write

FileSystemObject can translate a file into a file stream.

Step 1:

Example:

The Code is as follows:

Var fso = new ActiveXObject (Scripting. FileSystemObject );

Create an object that can translate a file into a file stream.

Step 2: Create a textStream object

There are three attributes in the brackets.

1. absolute path of the file

2. The constant of the file is read-only = 1, write-only = 2, and append = 8. (ForReading, ForWriting, or ForAppending .);

3. If a Boolean value is allowed to be created, the opposite value is true;

Example:

The Code is as follows:

Var f = fso. createtextfile ("C: \ a.txt", 2, true );

Step 3: Call the textStream Method

1. Write (do not add a new line break at the end of the written data)

2. WriteLine (Add a new line break at the end)

3. WriteBlankLines (add one or more empty lines)

Example:

The Code is as follows:

F. writeLine ("wo shi di yi hang ");

Step 4:

Disable textStream object:

Example: f. close ();

2. Read

Step 1:

The Code is as follows:

Var fso = new ActiveXObject (Scripting. FileSystemObject );

Create an object that can translate a file into a file stream.

Step 2: Create a textStream object

There are three attributes in the brackets.

4. Absolute file path

5. The constant of the file is read-only = 1, write-only = 2, and append = 8. (ForReading, ForWriting, or ForAppending .);

6. If a Boolean value is allowed to be created, the opposite value is false if the value is true;

Example:

The Code is as follows:

Var f = fso. opentextfile ("C: \ a.txt", 1, true );

Step 3: Call the read Method

1. Read (used to Read the specified number of characters in the file)

2. ReadLine)

3. ReadAll (reads the entire content of a text file );

Judge whether to read the last row

The Code is as follows:

While (! F. AtEndOfStream)
{
F. Readline ();
}

Step 4:

Disable textStream object:

Example: f. close ();

The following is an example of opening a txt file in html.

The Code is as follows:

Hi!