fix(typescript): Fix typescript declarations

Author: javierbrea

index.d.ts

@@ -6,40 +6,40 @@ declare namespace Cypress {
      * Command to save current localStorage values into an internal "snapshot"
      * @example cy.saveLocalStorage()
     */
-    saveLocalStorage(): Chainable<Element>
+    saveLocalStorage(): Chainable<undefined>
 
     /**
      * Command to restore localStorage to previously "snapshot" saved values
      * @example cy.restoreLocalStorage()
     */
-    restoreLocalStorage(): Chainable<Element>
+    restoreLocalStorage(): Chainable<undefined>
 
     /**
      * Command to clear localStorage "snapshot" values
      * @example cy.clearLocalStorageSnapshot()
     */
-    clearLocalStorageSnapshot(): Chainable<Element>
+    clearLocalStorageSnapshot(): Chainable<undefined>
 
     /**
      * Command to get localStorage item value
      * @param {string} itemKeyName - localStorage item to get
      * @example cy.getLocalStorage("cookies-accepted")
     */
-    getLocalStorage(itemKeyName: string): Chainable<Element>
+    getLocalStorage(itemKeyName: string): Chainable<string|null>
 
     /**
      * Command to set localStorage item value
      * @param {string} itemKeyName - localStorage item to set
      * @param {string} value - value to be set
      * @example cy.setLocalStorage("cookies-accepted", "true")
     */
-    setLocalStorage(itemKeyName: string, value: string): Chainable<Element>
+    setLocalStorage(itemKeyName: string, value: string): Chainable<undefined>
 
     /**
      * Command to remove localStorage item
      * @param {string} itemKeyName - localStorage item to remove
      * @example cy.removeLocalStorage("cookies-accepted")
     */
-    removeLocalStorage(itemKeyName: string): Chainable<Element>
+    removeLocalStorage(itemKeyName: string): Chainable<undefined>
   }
 }

test-e2e/typescript/cypress/integration/assertions-example.ts

@@ -22,6 +22,9 @@ describe("localStorage cookies-accepted item", () => {
 
   it("should be true after reloading", () => {
     cy.getLocalStorage("cookies-accepted").then((cookiesAccepted) => {
+      if (cookiesAccepted !== null) {
+        expect(JSON.parse(cookiesAccepted)).to.equal(true);
+      }
       expect(cookiesAccepted).to.equal("true");
     });
   });