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I always receive the exception: Cannot read properties of null (reading 'getElementsByTagName')

See original GitHub issue

I’m using the WebGLInput script in my input field (it is a TMP_InputField), and when I test it in my WebGL build, just when I put the focus on the input textbox, the execution is frozen and I receive these error logs in the Chrome console:

Error logs

rollbar.min.js:1 exception thrown: TypeError: Cannot read properties of null (reading 'getElementsByTagName'),TypeError: Cannot read properties of null (reading 'getElementsByTagName')
    at _WebGLInputCreate (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.framework.js.br?v=1653067972662:408:56004)
    at _WebGLInputPlugin_WebGLInputCreate_m285C4119EA43278205F4BBED9564AE827288F456 (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[127768]:0x200473a)
    at _WebGLInput_OnSelect_mA26F770E527D1E37BA62A28B7202E2491C9D5CDF (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[127767]:0x20044de)
    at _WebGLInput_Update_mB2E249ED9D67301C1B3993B0C6087CA81D2D4066 (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[127781]:0x2004b8b)
    at __Z65RuntimeInvoker_TrueVoid_t700C6383A2A510C2CF4DD86DABD5CA9FF70ADAC5PFvvEPK10MethodInfoPvPS4_ (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[126254]:0x1fdae04)
    at dynCall_iiiii (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[128463]:0x2020ef0)
    at Object.dynCall_iiiii (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.framework.js.br?v=1653067972662:408:534043)
    at invoke_iiiii (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.framework.js.br?v=1653067972662:408:365569)
    at __ZN6il2cpp2vm7Runtime6InvokeEPK10MethodInfoPvPS5_PP15Il2CppException (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[122183]:0x1f64817)
    at _il2cpp_runtime_invoke (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[120889]:0x1f3da08)
    at __Z23scripting_method_invoke18ScriptingMethodPtr18ScriptingObjectPtrR18ScriptingArgumentsP21ScriptingExceptionPtrb (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[5531]:0x25722d)
    at __ZN19ScriptingInvocation6InvokeEP21ScriptingExceptionPtrb (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[5529]:0x256f19)
    at __ZN13MonoBehaviour16CallUpdateMethodEi (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[12156]:0x48c0e0)
    at __ZN13MonoBehaviour6UpdateEv (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[12128]:0x48ab8d)
    at __ZN20BaseBehaviourManager12CommonUpdateI16BehaviourManagerEEvv (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[14625]:0x5bbcc3)
    at __ZN13UpdateManager6UpdateEv (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[14624]:0x5bb9dc)
    at __ZZ23InitPlayerLoopCallbacksvEN41UpdateScriptRunBehaviourUpdateRegistrator7ForwardEv (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[12656]:0x4bb30a)
    at __Z17ExecutePlayerLoopP22NativePlayerLoopSystem (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[12272]:0x495b36)
    at __Z17ExecutePlayerLoopP22NativePlayerLoopSystem (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[12272]:0x495b4b)
    at __Z10PlayerLoopv (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[12260]:0x495688)
    at __ZL8MainLoopv (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[12248]:0x49396b)
    at dynCall_v (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.wasm.br?v=1653067972662:wasm-function[128569]:0x2021b7f)
    at Object.dynCall_v (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.framework.js.br?v=1653067972662:408:547221)
    at browserIterationFunc (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.framework.js.br?v=1653067972662:408:189514)
    at Object.runIter (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.framework.js.br?v=1653067972662:408:192575)
    at Array.Browser_mainLoop_runner (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.framework.js.br?v=1653067972662:408:191037)
    at tick (https://renderer-artifacts.decentraland.org/branch/fix/cjk-fonts-issues/unity.framework.js.br?v=1653067972662:363:28)

Uncaught TypeError: Cannot read properties of null (reading 'getElementsByTagName')
    at _WebGLInputCreate (unity.framework.js.br?v=1653067972662:408:56004)
    at _WebGLInputPlugin_WebGLInputCreate_m285C4119EA43278205F4BBED9564AE827288F456 (unity.wasm.br?v=1653067972662:0x200473a)
    at _WebGLInput_OnSelect_mA26F770E527D1E37BA62A28B7202E2491C9D5CDF (unity.wasm.br?v=1653067972662:0x20044de)
    at _WebGLInput_Update_mB2E249ED9D67301C1B3993B0C6087CA81D2D4066 (unity.wasm.br?v=1653067972662:0x2004b8b)
    at __Z65RuntimeInvoker_TrueVoid_t700C6383A2A510C2CF4DD86DABD5CA9FF70ADAC5PFvvEPK10MethodInfoPvPS4_ (unity.wasm.br?v=1653067972662:0x1fdae04)
    at dynCall_iiiii (unity.wasm.br?v=1653067972662:0x2020ef0)
    at Object.dynCall_iiiii (unity.framework.js.br?v=1653067972662:408:534043)
    at invoke_iiiii (unity.framework.js.br?v=1653067972662:408:365569)
    at __ZN6il2cpp2vm7Runtime6InvokeEPK10MethodInfoPvPS5_PP15Il2CppException (unity.wasm.br?v=1653067972662:0x1f64817)
    at _il2cpp_runtime_invoke (unity.wasm.br?v=1653067972662:0x1f3da08)
    at __Z23scripting_method_invoke18ScriptingMethodPtr18ScriptingObjectPtrR18ScriptingArgumentsP21ScriptingExceptionPtrb (unity.wasm.br?v=1653067972662:0x25722d)
    at __ZN19ScriptingInvocation6InvokeEP21ScriptingExceptionPtrb (unity.wasm.br?v=1653067972662:0x256f19)
    at __ZN13MonoBehaviour16CallUpdateMethodEi (unity.wasm.br?v=1653067972662:0x48c0e0)
    at __ZN13MonoBehaviour6UpdateEv (unity.wasm.br?v=1653067972662:0x48ab8d)
    at __ZN20BaseBehaviourManager12CommonUpdateI16BehaviourManagerEEvv (unity.wasm.br?v=1653067972662:0x5bbcc3)
    at __ZN13UpdateManager6UpdateEv (unity.wasm.br?v=1653067972662:0x5bb9dc)
    at __ZZ23InitPlayerLoopCallbacksvEN41UpdateScriptRunBehaviourUpdateRegistrator7ForwardEv (unity.wasm.br?v=1653067972662:0x4bb30a)
    at __Z17ExecutePlayerLoopP22NativePlayerLoopSystem (unity.wasm.br?v=1653067972662:0x495b36)
    at __Z17ExecutePlayerLoopP22NativePlayerLoopSystem (unity.wasm.br?v=1653067972662:0x495b4b)
    at __Z10PlayerLoopv (unity.wasm.br?v=1653067972662:0x495688)
    at __ZL8MainLoopv (unity.wasm.br?v=1653067972662:0x49396b)
    at dynCall_v (unity.wasm.br?v=1653067972662:0x2021b7f)
    at Object.dynCall_v (unity.framework.js.br?v=1653067972662:408:547221)
    at browserIterationFunc (unity.framework.js.br?v=1653067972662:408:189514)
    at Object.runIter (unity.framework.js.br?v=1653067972662:408:192575)
    at Array.Browser_mainLoop_runner (unity.framework.js.br?v=1653067972662:408:191037)
    at tick (unity.framework.js.br?v=1653067972662:363:28)

Chrome console screenshot

image

My input field configuration in Unity

image image

Unity version used

Unity 2020.3.0f1

Thanks in advance! 😃

Issue Analytics

  • State:closed
  • Created a year ago
  • Comments:10

github_iconTop GitHub Comments

3reactions
KubilayHeterometacommented, Apr 14, 2023

error here: image

first there is a call to the method of container, and then a check for null

container.getElementsByTagName('canvas')[0] replace with document.getElementsByTagName('canvas')[0]

That solved my problem thx. I am using 2021.3.15f1. For the one who couldn’t find the file, it is “webgl-build.framework.js”. Which is one of the four files in your Build folder.

1reaction
sandrade-dclcommented, Sep 9, 2022

Finally I change the WebGLInput script, not on the webgl template You can find something like that on the script but th elif and else is set by commend, just delete the commend symbol Also see your webgl template canvasid is that same as the script to this. Hope this help

Yeah, after what @jmpy told me about the name of the div name, I looked for where in the code it was being used and I finally reached to the same solution that you suggest 😃 In my case I always use the name gameContainer for this div.

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