javascript - Not able to use browser.waitForAngular successfully after executing browser.executeScript in protractor -

only case code works. intention browser.waitforangular() after browser.executescript(script) has executed. why case b , case c not work i.e. test fails if use case b , case c??????? wrote code solve timing issues. writing valid/logical code in case b , case c :

  let executescript = (script, retrycount = 1) => {     console.log("executing javascript:" + script);     return browser.waitforangular().then(_ => {         return this.waitformyconditiontobeready(8000).then(_ => {           return browser.executescript(script).then( _ => _ , error => { // pass through if there's no error, otherwise handle error             if (error.name && (retrycount < 7)) {                 console.log("error: while executing executescript, retry count, retrying in 2 secs. ", error.name, retrycount);                 browser.sleep(2000);                 return executescript(script, ++retrycount);             }             throw error;           });         }, error => {           console.log("error: papo not ready", error.name);           throw error;         });       }, error => {       console.log("error: waitforangular in executescript: ", error.name);       throw error;     });   };   module.exports.executescript = executescript; 

case b: add {return browser.waitforangular();} successful callback.

let executescript = (script, retrycount = 1) => {     console.log("executing javascript:" + script);     return browser.waitforangular().then(_ => {         return this.waitformyconditiontobeready(8000).then(_ => {           return browser.executescript(script).then( _ => {return browser.waitforangular();} , error => { // pass through if there's no error, otherwise handle error             if (error.name && (retrycount < 7)) {                 console.log("error: while executing executescript, retry count, retrying in 2 secs. ", error.name, retrycount);                 browser.sleep(2000);                 return executescript(script, ++retrycount);             }             throw error;           });         }, error => {           console.log("error: papo not ready", error.name);           throw error;         });       }, error => {       console.log("error: waitforangular in executescript: ", error.name);       throw error;     });   };   module.exports.executescript = executescript; 

case c: if add waitforangular in end final then().

  let executescript = (script, retrycount = 1) => {     console.log("executing javascript:" + script);     return browser.waitforangular().then(_ => {         return this.waitformyconditiontobeready(8000).then(_ => {           return browser.executescript(script).then( _ => _ , error => { // pass through if there's no error, otherwise handle error             if (error.name && (retrycount < 7)) {                 console.log("error: while executing executescript, retry count, retrying in 2 secs. ", error.name, retrycount);                 browser.sleep(2000);                 return executescript(script, ++retrycount);             }             throw error;           });         }, error => {           console.log("error: papo not ready", error.name);           throw error;         });       }, error => {       console.log("error: waitforangular in executescript: ", error.name);       throw error;     }).then( _ => {return browser.waitforangular();});   };   module.exports.executescript = executescript;