How to set a selected option of a dropdown list control using angular JS

Question

I am using Angular JS and I need to set a selected option of a dropdown list control using angular JS  Forgive me if this is ridiculous but I am new with Angular JS   Here is the dropdown list control of my html    lt select ng-required  item id  8  amp  amp  item quantity  gt  0  name  posterVariants     ng-show  item id  8  ng-model  item selectedVariant      ng-change  calculateServicesSubTotal item      ng-options  v name for v in variants   filter  type 2   gt     lt  select gt    After it gets populated I get     lt select ng-options  v name for v in variants   filter  type 2   ng-change  calculateServicesSubTotal item   ng-model  item selectedVariant  ng-show  item id  8  name  posterVariants  ng-required  item id  8  amp amp  amp amp  item quantity  amp gt  0  class  ng-pristine ng-valid ng-valid-required  gt       lt option value     selected  selected  gt  lt  option gt       lt option value  0  gt set of 6 traits lt  option gt       lt option value  1  gt 5 complete sets lt  option gt   lt  select gt    How can I set the control for value  0  to be selected

User · Accepted Answer

I hope I understand your question  but the ng-model directive creates a two-way binding between the selected item in the control and the value of item selectedVariant  This means that changing item selectedVariant in JavaScript  or changing the value in the control  updates the other  If item selectedVariant has a value of 0  that item should get selected   If variants is an array of objects  item selectedVariant must be set to one of those objects  I do not know which information you have in your scope  but here s an example   JS    scope options      name   a   id  1      name   b   id  2      scope selectedOption    scope options 1     HTML    lt select data-ng-options  o name for o in options  data-ng-model  selectedOption  gt  lt  select gt    This would leave the  b  item to be selected

User · Answer

Try the following   JS file  this options              languages    language   English   lg  en     language  German   lg  de       console log signinDetails language     HTML file   lt div class  form-group col-sm-6  gt       lt label gt Preferred language lt  label gt       lt select class  form-control  name  right  ng-model  signinDetails language  ng-init  signinDetails language   options languages 0   ng-options  l as l language for l in options languages  gt  lt option gt  lt  option gt       lt  select gt   lt  div gt

User · Answer

This is the code what I used for the set selected value    x000D   x000D  countryList  any       value    AF    group    A    text    Afghanistan       value    AL    group    A    text    Albania       value    DZ    group    A    text    Algeria       value    AD    group    A    text    Andorra       value    AO    group    A    text    Angola       value    AR    group    A    text    Argentina       value    AM    group    A    text    Armenia       value    AW    group    A    text    Aruba       value    AU    group    A    text    Australia       value    AT    group    A    text    Austria       value    AZ    group    A    text    Azerbaijan     x000D    x000D    x000D   for  var j   0  j  lt  countryList length  j      x000D          debugger x000D        if  countryList j  text     Australia     x000D            console log countryList j  text    x000D            countryList j  isSelected    selected   x000D          x000D          x000D   lt script src  https   cdnjs cloudflare com ajax libs react 16 6 3 umd react production min js  gt  lt  script gt  x000D   lt script src  https   cdnjs cloudflare com ajax libs react-dom 16 6 3 umd react-dom production min js  gt  lt  script gt  x000D   lt script src  https   cdnjs cloudflare com ajax libs angular js 1 7 5 angular min js  gt  lt  script gt  x000D   lt label gt Country lt  label gt  x000D   lt select class  custom-select col-12  id  Country  name  Country     gt  x000D   lt option value  0  selected gt Choose    lt  option gt  x000D   lt option  ngFor  let country of countryList  value    country text    selected    country isSelected       gt    country text   lt  option gt  x000D   lt  select gt  x000D   x000D   x000D    try this on an angular framework

User · Answer

It can be usefull  Bindings dose not always work     lt select id  product  class  form-control  name  product  required         ng-model  issue productId          ng-change  getProductVersions            ng-options  p id as p shortName for p in products  gt   lt  select gt    For example  You fill options list source model from rest-service  Selected value was known befor filling list and was set  After executing rest-request with  http list option be done  But selected option is not set  By unknown reasons AngularJS in shadow  digest executing not bind selected as it shuold be  I gotta use JQuery to set selected  It s important  Angular in shadow add prefix to value of attr  value  for generated by ng-repeat optinos  For int it is  number      scope issue productId   productId  function activate         http get   product list         then function  response            scope products   response data          if  productId               console log          product option   length    for clarity                                    timeout function                     console log          product option   length    for clarity                    product   val  number   productId                     scope issue productId   productId   not work at all               200

User · Answer

i see here already wrote good answers  but sometime to write the same in other form can be helpful   lt div ng-app ng-controller  MyCtrl  gt     lt select ng-model  referral organization  ng-options  c for c in organizations  gt  lt  select gt   lt  div gt    lt script type  text javascript  gt    function MyCtrl  scope         scope organizations     a    b    c    d    e         scope referral           organization   scope organizations 2              lt  script gt

User · Answer

If you assign value 0 to item selectedVariant it should be selected automatically  Check out sample on http   docs angularjs org api ng directive select which selects red color by default by simply assigning  scope color  red

User · Answer

JS    scope options             name   a        id  1               name   b       id  2          scope selectedOption    scope options 1

User · Answer

Simple way  If you have a Users as response or a Array JSON you defined  First You need to set the selected value in controller  then you put the same model name in html  This example i wrote to explain in easiest way  Simple example Inside Controller    scope Users     Suresh   Mahesh   Ramesh      scope selectedUser    scope Users 0     Your HTML   lt select data-ng-options  usr for usr in Users  data-ng-model  selectedUser  gt   lt  select gt    complex example Inside Controller    scope JSON             ResponseObject                                 Name    Suresh                   userID   1                                            Name    Mahesh                   userID   2                         scope selectedUser    scope JSON ResponseObject 0     Your HTML   lt select data-ng-options  usr Name for usr in JSON ResponseObject  data-ng-model  selectedUser  gt  lt  select gt   lt h3 gt You selected    selectedUser Name   lt  h3 gt

User · Answer

I don t know if this will help anyone or not but as I was facing the same issue I thought of sharing how I got the solution   You can use track by attribute in your ng-options    Assume that you have   variants    id  0  name  set of 6 traits      id  1  name  5 complete sets      You can mention your ng-options as   ng-options  v name for v in variants track by v id    Hope this helps someone in future

[angularjs] How to set a selected option of a dropdown list control using angular JS

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