It says that TypeError document getElementById is null

Question

Althought I pushed a parameter to getElementById I wonder from where is this  is null  error coming from    TypeError  document getElementById      is null  Break On This Error      document getElementById elmId  innerHTML   value   Line 75     In addition to this i wonder why title and time did not show unless I click one of these playlist pictures

User · Answer

It means that element with id passed to getElementById   does not exist

User · Answer

You can use JQuery to ensure that all elements of the documents are ready before it starts the client side scripting    document  ready      function                 document getElementById elmId  innerHTML   value

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Make sure the script is placed in the bottom of the BODY element of the document you re trying to manipulate  not in the HEAD element or placed before any of the elements you want to  get    It does not matter if you import the script or if it s inline  the important thing is the placing  You don t have to put the command inside a function either  while it s good practice you can just call it directly  it works just fine

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In your code  you can find this function      Update a particular HTML element with a new value function updateHTML elmId  value      document getElementById elmId  innerHTML   value      Later on  you call this function with several params   updateHTML  videoCurrentTime   secondsToHms ytplayer getCurrentTime           updateHTML  videoDuration   secondsToHms ytplayer getDuration      updateHTML  bytesTotal   ytplayer getVideoBytesTotal     updateHTML  startBytes   ytplayer getVideoStartBytes     updateHTML  bytesLoaded   ytplayer getVideoBytesLoaded     updateHTML  volume   ytplayer getVolume       The first param is used for the  getElementById   but the elements with ID  bytesTotal    startBytes    bytesLoaded  and  volume  don t exist  You ll need to create them  since they ll return null

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I got the same error  In my case I had multiple div with same id in a page  I renamed the another id of the div used and fixed the issue   So confirm whether the element    exists with id doesn t have duplicate with id confirm whether the script is called

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All these results in null   document getElementById  volume    document getElementById  bytesLoaded    document getElementById  startBytes    document getElementById  bytesTotal      You need to do a null check in updateHTML like this   function updateHTML elmId  value      var elem   document getElementById elmId     if typeof elem      undefined   amp  amp  elem     null        elem innerHTML   value

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I have same problem  It just the javascript s script loads too fast--before the HTML s element loaded  So the browser returning null  since the browser can t find where is the element you like to manipulate

User · Answer

Found similar problem within student s work  script element was put after closing body tag  so  obviously  JavaScript could not find any HTML element   But  there was one more serious error  there was a reference to an external javascript file with some code  which removed all contents of a certain HTML element before inserting new content  After commenting out this reference  everything worked properly   So  sometimes the error might be that some previously called Javascript changed content or even DOM  so calling for instance getElementById later doesn t make sense  since that element was removed

[javascript] It says that TypeError: document.getElementById(...) is null

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