TypeError window initMap is not a function

Question

I am following this tutorial  basically copy all the code  https   developers google com maps documentation javascript tutorial  but got an error saying that the initMap function is not a function  I am using angularjs in my project  could that be causing problems   I copied the same code into plunker and it works just fine    What are the possible issues

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Create initMap method between    tag or load javascript file before call google api    x000D   x000D   lt script src  Scripts main js  gt  lt  script gt  x000D   x000D   lt script src  https   maps googleapis com maps api js key abcde amp libraries places amp callback initMap  async defer gt  lt  script gt  x000D   x000D   x000D

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For me the main difference was the declaration of the function     INSTEAD OF function initMap                THIS WORKED window initMap   function

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In my case there was a formatting issue earlier on  so the error was a consequence of something else   My server was rendering the lat lon values with commas instead of periods  because of different regional settings

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turns out it has to do with ng-Route and the order of loading script wrote a directive and put the API script on top of everything works

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I have been struggling for several days with this very popular in the last few months issue -  initMap is not a function    Those two threads helped me    How to make a callback to Google Maps init in separate files of a web app Defer attribute doesn  39 t work with Google Maps API    Why does the map open sometimes and sometimes not  It depends on several factors like speed of connection  environment  etc  Because the initialization function sometimes runs after the google maps API kicks in  that s why the map is not displayed and the browser console throws an error  For me removing only the async attribute fixed the issue  The defer attribute stays   If async is present  The script is executed asynchronously with the rest of the page  the script will be executed while the page continues the parsing  If async is not present and defer is present  The script is executed when the page has finished parsing If neither async or defer is present  The script is fetched and executed immediately  before the browser continues parsing the page Source - http   www w3schools com tags att script defer asp  Hope that helps  Cheers

User · Answer

The problem has to do with the async attribute in the script tag  The Callback Function is trying to call  initMap    when it doesn t really exists by the time the request finished   To solve this I placed the Goole Maps Api Script bellow the script where my initMap function was declared   Hope this helps

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I am using React and I had mentioned  amp callback initMap in the script as below    lt script  src  https   maps googleapis com maps api js   key YOUR API KEY amp callback initMap  gt   lt  script gt    then is just removed the  amp callback initMap part now there is no such error as window initMap is not a function in the console

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In my case  I had to load the Map on my Wordpress website and the problem was that the Google s api script was loading before the initMap    Therefore  I solved the problem with a delay    lt script gt  function initMap             Your Javascript Codes for the map              lt  php    Delay for 5 seconds sleep 5     gt    lt  script gt   lt script async defer src  https   maps googleapis com maps api js key YOUR API KEYWY amp callback initMap  gt  lt  script gt

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In addition to  DB Null s answer  I used Function prototype as no-op  no-operation  function on  3 instead of angular noop  I don t have angular in my project    So this      lt script async defer src  https   maps googleapis com maps api js key API KEY HERE amp callback Function prototype  type  text javascript  gt  lt  script gt

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My explanation of this problem   The       amp callback initMap  async defer gt  lt  script gt  makes that script load async  in parallel with DOM  and after load - execute initMap function  NOTICE that initMap   in global scope  We can t declare our initMap   after google s script because it should already be at the moment of finish async load  Although we can t load our script before this  because we need google s function to execute ours   This is like vicious circle   Three solutions   1 st and worst  make google s script load synchronously   remove async defer remove  amp callback initMap in src attribute put  lt script tag with your code after google s script   2 nd and best  just do this      leave       amp callback initMap  async defer gt  lt  script gt  as is and put google s  lt script tag after your script write in your script    function initMap         now it IS a function and it is in global         gt      initMap   function            your code like        var map   new google maps Map document getElementById  map       your code             and other stuff             this allow you load google s script async and run yours just after that    3 rd and strange  it will work    some times      do same but simply write in global scope  function initMap          your code     and if you write it in global scope  that will work regardless of what which code loads faster  your  sync  or google s  async   More often your wins

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your call back method probably is not globally accessible  in my case I d used transpoiled ES6 codes via webpack which caused my callback method not being global anymore   Try to attach your callback method explicitly to window like so right after your callback method declaration and see the result   window initMap   initMap    it worked for me

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This may seem obvious but just in case  If someone placed the JS code inside   document  ready like this          document  ready function                Google Maps JS code               Then that s the problem because using async defer when loading the Google Maps API library  it will load asynchronously  and when it finishes loading  will look for the callback function  which needs to be available by then   So  you just need to put the code outside   document  ready  and     lt script src  https   maps googleapis com maps api js key YOUR API KEY amp callback initMap      async defer gt  lt  script gt    at the very bottom  so your page loads FAST  -

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Put this in your html body  taken from the official angular js website     lt script src  https   ajax googleapis com ajax libs angularjs 1 4 5 angular min js  gt  lt  script gt    I believe that you were using some older angular js files since you don t have any issues in plunker and therefore you got the specified error

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Could be your initMap function is in a   document  ready function  If it is then it won t work  it has to be outside of any other functions

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I had a similar error  The answers here helped me figure out what to do   index html    lt  --The div element for the map -- gt    lt div id  map  gt  lt  div gt    lt  --The link to external javascript file that has initMap   function-- gt    lt script src  main js  gt    lt  --Google api  this calls initMap   function-- gt    lt script async defer src  https   maps googleapis com maps api js key YOUR API KEYWY amp callback initMap  gt   lt  script gt    main js    This gives error      The initMap function has not been executed const initMap        gt    const mapDisplayElement   document getElementById  map         The address is Uluru const address    lat  -25 344  lng  131 036        The zoom property specifies the zoom level for the map  Zoom  0 is the lowest zoom and displays the entire earth  const map   new google maps Map mapDisplayElement    zoom  4  center  address     const marker   new google maps Marker   position  address  map          The answers here helped me figure out a solution  I used an immediately invoked the function  IIFE    to work around it    The error is as at the time of calling the google maps api the initMap   function has not executed   main js    This works  const mapDisplayElement   document getElementById  map       The address is Uluru    Run the initMap   function imidiately    initMap        gt      const address    lat  -25 344  lng  131 036        The zoom property specifies the zoom level for the map  Zoom  0 is the lowest zoom and displays the entire earth    const map   new google maps Map mapDisplayElement    zoom  4  center  address       const marker   new google maps Marker   position  address  map

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Actually the error is being generated by the initMap in the Google s api script    lt script async defer   src  https   maps googleapis com maps api js key YOUR API KEY amp callback initMap  gt   lt  script gt    so basically when the Google Map API is loaded then the initMap function is executed   If you don t have an initMap function  then the initMap is not a function error is generated   So basically what you have to do is one of the following options    to create an initMap function replace the callback function with one of your own that created for the same purpose but named it something else replace the  amp callback angular noop if you just want an empty function    only if you use angular

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Solved by adding    lt script async defer     src  https   maps googleapis com maps api js key XXXXXXX amp callback initMap  gt       lt  --         https   developers google com maps documentation javascript examples map-geolocation     -- gt   lt  script gt    At the beginning of the same file which contains the rest of the code with function initMap    It s definitely not the best solution  but it works    But I think that if you would transform function initMap   to something like var initMap   and then   function        it would work too

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Removing  initMap worked for me    lt script async defer src  https   maps googleapis com maps api js key YOUR API KEY amp callback  gt  lt  script gt

[angularjs] TypeError: window.initMap is not a function

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