Google Sheets formula to determine if text in a cell is italic - google-apps-script

Question

Is it possible in Google Sheets to run a formula to determine if the text in a cell is italic?
Something like isItalic(a1) which would return TRUE / FALSE, so that the column could be filtered on?

Answer 1

You could also do something like the following in Google Sheets.
The .getFontStyle() method might be what you're looking for.
var ID = 'yourDocumentID';
var name = 'nameOfYourSheet';
function myFunction() {
var sourceSheet = SpreadsheetApp.openById(ID); // Selects your Source Spreadsheet by its ID
var ssheet = sourceSheet.getSheetByName(name); // Selects your Source Sheet by its Name
var range = ssheet.getRange(6, 10) // Selects J6 (just as an example)
var fontStyle = range.getFontStyle(); // Tells you the font style
ssheet.getRange(1,1).setValue(fontStyle); // writes the font style into A1
var returnBoolean = range.getFontStyle() === 'italic' ? true : false; // checks if getFontStyle is true or false
ssheet.getRange(2,1).setValue(returnBoolean); // writes the boolean into A2
}
A link to the docs can be found here.

Answer 2

=CHECKSTYLE(A1, "italic")
function CHECKSTYLE(range, styleElement) {
var arr = [],
ret;
var styleEl = ["line-through", "underline", "italic", "bold"]
var range = SpreadsheetApp.getActiveSheet()
.getRange(range);
var styles;
if (styleEl.indexOf(styleElement) == 2) {
styles = range.getFontStyles()
} else if (styleEl.indexOf(styleElement) == 3) {
styles = range.getFontWeights()
} else if (styleEl.indexOf(styleElement) != -1) {
styles = range.getFontLines();
} else {
throw "the 2nd parameter can only be " + styleEl.toString()
.replace(",", ", ")
}
styles.reduce(function (a, b) {
return a.concat(b);
})
.forEach(function (el) {
el === styleElement ? arr.push(["TRUE"]) : arr.push(["FALSE"])
});
range.getNumRows() == 1 ? ret = transpose(arr) : ret = arr;
return ret;
}

Answer 3

// In cell place =ISSTYLE((CELL("address",D4)&":"&CELL("address",D4)), "italic")
function ISSTYLE(pRange, styleElement) {
// thanks to Https://stackoverflow.com/questions/54308576/google-sheets-formula-to-determine-if-text-in-a-cell-is-italic
// thanks to https://webapps.stackexchange.com/questions/10629/how-to-pass-a-range-into-a-custom-function-in-google-spreadsheets/92156
var range = SpreadsheetApp.getActiveSpreadsheet().getRange(pRange);
return range.getFontStyle() == styleElement;
}