I found some issues with your code, just simple stuff that every beginner goes through (I did), I’ll bullet them off:
MyTitleisn’tmyTitle, JavaScript variables are case-sensetive.- You should stay away from the
onclickattribute; he’s a bad influence. The point, inline JS is generally not a good idea. - So I added an event listener event instead:
[...].addEventListener("click", callback); - Your DOM request to the input box used an undefined variable/object/etc. called
myTextBox, instead of a string"myTextBox".
Anyway, I made a JSFiddle for the code, so I could test it, so here is the link to the code with the edits I explained above: https://jsfiddle.net/Lktzw0Lh/
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solved What is wrong with this basic Javascript code? [closed]