Indesign script

Add leading & trailing space to a specific character style.jsx

// Set true to "normalize" the character styled text = no extra leading & trailing spaces
var removeSpace = false;

app.findTextPreferences = null;
app.changeTextPreferences = null;

var findPref = app.findTextPreferences;
var changePref = app.changeTextPreferences;
findPref.appliedCharacterStyle = 'yellow-background';

var doc = app.activeDocument;
var search = doc.findText();
for (var i = 0; i < search.length; i++) {

	var text = search[i];
	var string = text.contents;
	var space = removeSpace ? '' : ' '; // Just a regular space
	changePref.changeTo = space + text.contents.replace(/^\s+/,'').replace(/\s+$/,'') + space;
	text.changeText();
	
}

Example gif: