JavaScript write txt and read TXT file example

1. Write

FileSystemObject can translate files into a file stream.

The first step:

Cases:

The code is as follows:

Var fso=New

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

Step two: Use to create a TextStream object

There are three properties inside the parentheses

1. Absolute path to the file

2. The file's constant number is read Only = 1, write only = 2, append =8 and other permissions. (ForReading, ForWriting, or forappending. ）；

3. A Boolean value that allows new is true instead of false;

Cases:

The code is as follows:

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

Step three: Call the TextStream method

1. Write (do not add new line breaks at the end of the write data)

2. WriteLine (to add a new newline character at the end)

3. WriteBlankLines (add one or more empty rows)

Cases:

The code is as follows:

Fourth Step:

To close the TextStream object:

Example: F.close ();

2. Read

The first step:

The code is as follows:

Var fso=New

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

Step two: Use to create a TextStream object

There are three properties inside the parentheses

4. Absolute path to the file

5. The file's constant number is read Only = 1, write only = 2, append =8 and other permissions. (ForReading, ForWriting, or forappending. ）；

6. A Boolean value that allows new is true instead of false;

Cases:

The code is as follows:

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

Step three: Call the Read method

1. Read (for reading a specified number of characters in a file)

2. ReadLine (reads a whole line, but does not include newline characters)

3. ReadAll (then reads the entire contents of the text file);

Determine if the last line is read

The code is as follows:

 while (!

Fourth Step:

To close the TextStream object:

Example: F.close ();

Here is an example of an HTML open TXT file.

The code is as follows:

 <! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd "> var   FSO, TS, S; 
    var  ForReading = 1 = new  activexobject (" Scripting.FileSystemObject " = Fso. OpenTextFile ("D:\\testfile.txt"  =  ts. ReadLine (); document.getElementById ( "AA"). Innerhtml=s;  </script> </body> 

JavaScript write txt and read TXT file example