Fix crash on Safari (#339)

and iOS browsers as they don't support lookbehind is regular expressions.

CHANGELOG.md

@@ -22,5 +22,6 @@ Released changes are shown in the
 - Showing long utterances fully on hover in similar and perturbed utterances tables.
 - Webapp crash when no pipeline.
 - Sort confidence or prediction without postprocessing.
+- Crash on Safari and iOS browsers as they don't support lookbehind in regular expressions.
 
 ### Security

webapp/src/utils/format.test.ts

@@ -36,7 +36,7 @@ test("formatRatioASPercentageString", () => {
 });
 
 describe("camelToTitleCase", () => {
-  it("should convert CamelCase to TitleCase", () => {
+  it("should convert CamelCase to Title Case", () => {
     expect(camelToTitleCase("SimpleCamelCase")).toBe("Simple Camel Case");
   });
   it("should support acronyms", () => {

webapp/src/utils/format.ts

@@ -13,4 +13,5 @@ export const formatRatioAsPercentageString = (
 ) => `${formatNumberAsString(100 * value, digits)}%`;
 
 export const camelToTitleCase = (camelCase: string) =>
-  camelCase.replace(/(?<=[a-z])(?=[A-Z0-9])|(?<=[A-Z0-9])(?=[A-Z][a-z])/g, " ");
+  // Safari and iOS browsers don't support lookbehind in regular expressions.
+  camelCase.replace(/([a-z])(?=[A-Z0-9])|([A-Z0-9])(?=[A-Z][a-z])/g, "$1$2 ");