I am a Photoshop scripting beginner. I want to ask everyone how to replace the text layer

Question

I am a Photoshop scripting beginner. I want to ask everyone how to replace the text layer in photoshop with Photoshop to read the contents of the external txt file. I am very annoyed.

Answer 1

First load the contents of the external text-file:

var extText = new File("path/to/external.txt");
if( extText ) {
    extText.open('r');
    var content = "";
    while(!extText.eof) contents += extText.readln() + "\n";
    extText.close();
};

Then use that the contents to update your text-layer:

var textLayer = app.activeDocument.artLayers.getByName("layer-name");  

textLayer.textItem.contents = contents;

Hope this will help you feel less annoyed ;)