Set Font Size.sketchplugin

// Change Selected Layers' Font Size (cmd shift t)
// This plugin will change the font size of all the text layers in the selection.
// If the selection is mixed (i.e: shapes and text layers) only text layers will be
// affected, and the selection will be modified when running the command, so only
// text layers will remain selected after running it.

var textLayers = []

for (var i=0; i < [selection count]; i++) {
  var layer = [selection objectAtIndex:i]
  if ([layer isKindOfClass:[MSTextLayer class]]) {
    textLayers.push(layer)
  }
}

if (textLayers.length == 0) {
  [doc showMessage:"You need to select at least one text layer"]
} else {
  var size = [doc askForUserInput:"Font Size for selected layers?" initialValue:16]
  for (var i=0; i < textLayers.length; i++) {
    var textLayer = textLayers[i]
    [textLayer setFontSize:size]
  }
  [[doc currentPage] deselectAllLayers]
  for(var i=0; i < textLayers.length; i++){
    var layer = textLayers[i]
    [layer select:true byExpandingSelection:true]
  }
}