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Help Hide Element Using JavaScript

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Sep 19.2019

[upl-image-preview url=https://www.webdeveloper.com/assets/files/2019-09-19/1568919459-406503-hmtltest.png]
[upl-image-preview url=https://www.webdeveloper.com/assets/files/2019-09-19/1568919459-486009-javascripttest.png]
[upl-image-preview url=https://www.webdeveloper.com/assets/files/2019-09-19/1568919459-549182-terminaltest.png]

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@JavaLeattaLynnauthorSep 19.2019 — ["Hide Element Using JavaScript","Help Hide Element Using JavaScript"]
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@SempervivumSep 19.2019 — You better post code in as text in code tags: `your code here`, not as screenshots.

And I recommend using meaningful names instead of x, y, z, a, b.

I cannot spot any error in the last line of code. Did you place the javascript [b]below[/b] the HTML? If not, the DOM elements do not yet exist and getElementById will return null.
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