How To Read Editor Text Before Cursor Position To Match Specific Words?

I am trying to detect when the cursor has moved somewhere immediately after a specific strings ... I can do it only for I have one string , But when I have more than one I cant't m

Solution 1:

You could use a regular expression for matching one of several words:

var line = e.doc.getCursor().line,   //Cursor line
    ch = e.doc.getCursor().ch,       //Cursor character
    // Select all characters before cursor
    stringToTest = e.doc.getLine(line).substr(0, ch), 
    // Array with search words: escape characters for use in regular expression:
    array=["one","three","five"].map( s => s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&') );

// Join words with OR (|) and require they match just before the cursor 
// (i.e. at end of string: $)
if (stringToTest.match(new RegExp('('+array.join('|')+')$'))) console.log("SUCCESS!!!");

Here is a working snippet:

var editor = CodeMirror.fromTextArea(myTextarea, {
  lineNumbers: true
});

//Catch cursor change event
editor.on('cursorActivity',function(e){
  var line = e.doc.getCursor().line,   //Cursor line
      ch = e.doc.getCursor().ch,       //Cursor character
      // Select all characters before cursor
      stringToTest = e.doc.getLine(line).substr(0, ch), 
      // Array with search words: escape characters for use in regular expression:
      array=["one","three","five"]
          .map( s => s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&') );

  // Join words and require they match just before the cursor 
  // (i.e. at end of string: $)
  if (stringToTest.match(new RegExp('(' + array.join('|') + ')$')))
    console.log("SUCCESS!!!");
});

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.19.0/codemirror.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.19.0/codemirror.js"></script>
<textarea id="myTextarea"></textarea>