When using patchValue method to update form value, form becomes dirty?












2














I have to know concept of patchValue method. when using patch value method to update form value, form becomes dirty.






// using this way

setTimeout(() => {
this.skillForm.patchValue({
date: [new Date()],
});
}, 1000);





sample : click here



But, if i use like below form wont become dirty






setTimeout(() => {
// workaround for this scenario
this.skillForm.controls['date'].patchValue(new Date());

}, 1000);





sample link : click here










share|improve this question





























    2














    I have to know concept of patchValue method. when using patch value method to update form value, form becomes dirty.






    // using this way

    setTimeout(() => {
    this.skillForm.patchValue({
    date: [new Date()],
    });
    }, 1000);





    sample : click here



    But, if i use like below form wont become dirty






    setTimeout(() => {
    // workaround for this scenario
    this.skillForm.controls['date'].patchValue(new Date());

    }, 1000);





    sample link : click here










    share|improve this question



























      2












      2








      2


      3





      I have to know concept of patchValue method. when using patch value method to update form value, form becomes dirty.






      // using this way

      setTimeout(() => {
      this.skillForm.patchValue({
      date: [new Date()],
      });
      }, 1000);





      sample : click here



      But, if i use like below form wont become dirty






      setTimeout(() => {
      // workaround for this scenario
      this.skillForm.controls['date'].patchValue(new Date());

      }, 1000);





      sample link : click here










      share|improve this question















      I have to know concept of patchValue method. when using patch value method to update form value, form becomes dirty.






      // using this way

      setTimeout(() => {
      this.skillForm.patchValue({
      date: [new Date()],
      });
      }, 1000);





      sample : click here



      But, if i use like below form wont become dirty






      setTimeout(() => {
      // workaround for this scenario
      this.skillForm.controls['date'].patchValue(new Date());

      }, 1000);





      sample link : click here






      // using this way

      setTimeout(() => {
      this.skillForm.patchValue({
      date: [new Date()],
      });
      }, 1000);





      // using this way

      setTimeout(() => {
      this.skillForm.patchValue({
      date: [new Date()],
      });
      }, 1000);





      setTimeout(() => {
      // workaround for this scenario
      this.skillForm.controls['date'].patchValue(new Date());

      }, 1000);





      setTimeout(() => {
      // workaround for this scenario
      this.skillForm.controls['date'].patchValue(new Date());

      }, 1000);






      angular typescript angular-reactive-forms angular-forms






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 23 at 4:53

























      asked Nov 23 at 4:34









      kumaresan_sd

      1089




      1089
























          1 Answer
          1






          active

          oldest

          votes


















          2














          Answer




          updated sample click here




          you have to use this way, it wont add ng-dirty class






           setTimeout(() => {
          this.skillForm.patchValue({
          //compare this
          date: new Date(),
          });
          }, 3000);








          share|improve this answer























          • In angular, ng-sirty class gets added only when form UI gets updated........when we changes value ofform programaticlly, ng-dirty class wont add
            – kumaresan_sd
            Nov 23 at 6:29










          • @kumaresan_sd I see, but please confirm your source. Example 1, the patchValue is date: [new Date()] , it is Array, but second not, it is reason of why different.
            – incNick
            Nov 23 at 6:43












          • i think you did not get my issue
            – kumaresan_sd
            Nov 23 at 7:03










          • In fact, I spent more then half hour there, and read the source between formGroup.patchValue and control.patchValue, and finally is because your source reason. please copy it to your source and run: setTimeout(() => {this.skillForm.controls['date'].patchValue([new Date()]);}, 1000); the dirty message there, right?
            – incNick
            Nov 23 at 7:43










          • and you also can copy it and run setTimeout(() => {this.skillForm.patchValue({date: new Date(),});}, 1000); the dirty message lost.
            – incNick
            Nov 23 at 7:45











          Your Answer






          StackExchange.ifUsing("editor", function () {
          StackExchange.using("externalEditor", function () {
          StackExchange.using("snippets", function () {
          StackExchange.snippets.init();
          });
          });
          }, "code-snippets");

          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "1"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          autoActivateHeartbeat: false,
          convertImagesToLinks: true,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: 10,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














          draft saved

          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53440698%2fwhen-using-patchvalue-method-to-update-form-value-form-becomes-dirty%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown

























          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          2














          Answer




          updated sample click here




          you have to use this way, it wont add ng-dirty class






           setTimeout(() => {
          this.skillForm.patchValue({
          //compare this
          date: new Date(),
          });
          }, 3000);








          share|improve this answer























          • In angular, ng-sirty class gets added only when form UI gets updated........when we changes value ofform programaticlly, ng-dirty class wont add
            – kumaresan_sd
            Nov 23 at 6:29










          • @kumaresan_sd I see, but please confirm your source. Example 1, the patchValue is date: [new Date()] , it is Array, but second not, it is reason of why different.
            – incNick
            Nov 23 at 6:43












          • i think you did not get my issue
            – kumaresan_sd
            Nov 23 at 7:03










          • In fact, I spent more then half hour there, and read the source between formGroup.patchValue and control.patchValue, and finally is because your source reason. please copy it to your source and run: setTimeout(() => {this.skillForm.controls['date'].patchValue([new Date()]);}, 1000); the dirty message there, right?
            – incNick
            Nov 23 at 7:43










          • and you also can copy it and run setTimeout(() => {this.skillForm.patchValue({date: new Date(),});}, 1000); the dirty message lost.
            – incNick
            Nov 23 at 7:45
















          2














          Answer




          updated sample click here




          you have to use this way, it wont add ng-dirty class






           setTimeout(() => {
          this.skillForm.patchValue({
          //compare this
          date: new Date(),
          });
          }, 3000);








          share|improve this answer























          • In angular, ng-sirty class gets added only when form UI gets updated........when we changes value ofform programaticlly, ng-dirty class wont add
            – kumaresan_sd
            Nov 23 at 6:29










          • @kumaresan_sd I see, but please confirm your source. Example 1, the patchValue is date: [new Date()] , it is Array, but second not, it is reason of why different.
            – incNick
            Nov 23 at 6:43












          • i think you did not get my issue
            – kumaresan_sd
            Nov 23 at 7:03










          • In fact, I spent more then half hour there, and read the source between formGroup.patchValue and control.patchValue, and finally is because your source reason. please copy it to your source and run: setTimeout(() => {this.skillForm.controls['date'].patchValue([new Date()]);}, 1000); the dirty message there, right?
            – incNick
            Nov 23 at 7:43










          • and you also can copy it and run setTimeout(() => {this.skillForm.patchValue({date: new Date(),});}, 1000); the dirty message lost.
            – incNick
            Nov 23 at 7:45














          2












          2








          2






          Answer




          updated sample click here




          you have to use this way, it wont add ng-dirty class






           setTimeout(() => {
          this.skillForm.patchValue({
          //compare this
          date: new Date(),
          });
          }, 3000);








          share|improve this answer














          Answer




          updated sample click here




          you have to use this way, it wont add ng-dirty class






           setTimeout(() => {
          this.skillForm.patchValue({
          //compare this
          date: new Date(),
          });
          }, 3000);








           setTimeout(() => {
          this.skillForm.patchValue({
          //compare this
          date: new Date(),
          });
          }, 3000);





           setTimeout(() => {
          this.skillForm.patchValue({
          //compare this
          date: new Date(),
          });
          }, 3000);






          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 23 at 10:15









          kumaresan_sd

          1089




          1089










          answered Nov 23 at 6:20









          incNick

          35715




          35715












          • In angular, ng-sirty class gets added only when form UI gets updated........when we changes value ofform programaticlly, ng-dirty class wont add
            – kumaresan_sd
            Nov 23 at 6:29










          • @kumaresan_sd I see, but please confirm your source. Example 1, the patchValue is date: [new Date()] , it is Array, but second not, it is reason of why different.
            – incNick
            Nov 23 at 6:43












          • i think you did not get my issue
            – kumaresan_sd
            Nov 23 at 7:03










          • In fact, I spent more then half hour there, and read the source between formGroup.patchValue and control.patchValue, and finally is because your source reason. please copy it to your source and run: setTimeout(() => {this.skillForm.controls['date'].patchValue([new Date()]);}, 1000); the dirty message there, right?
            – incNick
            Nov 23 at 7:43










          • and you also can copy it and run setTimeout(() => {this.skillForm.patchValue({date: new Date(),});}, 1000); the dirty message lost.
            – incNick
            Nov 23 at 7:45


















          • In angular, ng-sirty class gets added only when form UI gets updated........when we changes value ofform programaticlly, ng-dirty class wont add
            – kumaresan_sd
            Nov 23 at 6:29










          • @kumaresan_sd I see, but please confirm your source. Example 1, the patchValue is date: [new Date()] , it is Array, but second not, it is reason of why different.
            – incNick
            Nov 23 at 6:43












          • i think you did not get my issue
            – kumaresan_sd
            Nov 23 at 7:03










          • In fact, I spent more then half hour there, and read the source between formGroup.patchValue and control.patchValue, and finally is because your source reason. please copy it to your source and run: setTimeout(() => {this.skillForm.controls['date'].patchValue([new Date()]);}, 1000); the dirty message there, right?
            – incNick
            Nov 23 at 7:43










          • and you also can copy it and run setTimeout(() => {this.skillForm.patchValue({date: new Date(),});}, 1000); the dirty message lost.
            – incNick
            Nov 23 at 7:45
















          In angular, ng-sirty class gets added only when form UI gets updated........when we changes value ofform programaticlly, ng-dirty class wont add
          – kumaresan_sd
          Nov 23 at 6:29




          In angular, ng-sirty class gets added only when form UI gets updated........when we changes value ofform programaticlly, ng-dirty class wont add
          – kumaresan_sd
          Nov 23 at 6:29












          @kumaresan_sd I see, but please confirm your source. Example 1, the patchValue is date: [new Date()] , it is Array, but second not, it is reason of why different.
          – incNick
          Nov 23 at 6:43






          @kumaresan_sd I see, but please confirm your source. Example 1, the patchValue is date: [new Date()] , it is Array, but second not, it is reason of why different.
          – incNick
          Nov 23 at 6:43














          i think you did not get my issue
          – kumaresan_sd
          Nov 23 at 7:03




          i think you did not get my issue
          – kumaresan_sd
          Nov 23 at 7:03












          In fact, I spent more then half hour there, and read the source between formGroup.patchValue and control.patchValue, and finally is because your source reason. please copy it to your source and run: setTimeout(() => {this.skillForm.controls['date'].patchValue([new Date()]);}, 1000); the dirty message there, right?
          – incNick
          Nov 23 at 7:43




          In fact, I spent more then half hour there, and read the source between formGroup.patchValue and control.patchValue, and finally is because your source reason. please copy it to your source and run: setTimeout(() => {this.skillForm.controls['date'].patchValue([new Date()]);}, 1000); the dirty message there, right?
          – incNick
          Nov 23 at 7:43












          and you also can copy it and run setTimeout(() => {this.skillForm.patchValue({date: new Date(),});}, 1000); the dirty message lost.
          – incNick
          Nov 23 at 7:45




          and you also can copy it and run setTimeout(() => {this.skillForm.patchValue({date: new Date(),});}, 1000); the dirty message lost.
          – incNick
          Nov 23 at 7:45


















          draft saved

          draft discarded




















































          Thanks for contributing an answer to Stack Overflow!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.





          Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


          Please pay close attention to the following guidance:


          • Please be sure to answer the question. Provide details and share your research!

          But avoid



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53440698%2fwhen-using-patchvalue-method-to-update-form-value-form-becomes-dirty%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown





















































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown

































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown







          Popular posts from this blog

          Contact image not getting when fetch all contact list from iPhone by CNContact

          count number of partitions of a set with n elements into k subsets

          A CLEAN and SIMPLE way to add appendices to Table of Contents and bookmarks