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Event listeners in JavaScript
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You have a button here and you want to hide this button whenever a user clicks on it
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So just select this button using document.querySelector, then add an event listener that will trigger a callback function when someone clicks on this button
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The callback function will change the display property of this button to none
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We can also do a console.log saying I am ninja and now you click on this button. It's hidden and becomes a ninja
