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JavaScript

jason limmm
jason limmm
8,009 Points
Posted by jason limmm
jason limmm
8,009 Points

queryselect error

document.querySelector("button[type="button"]").addEventListener('click', req());

anything wrong with my queryselector, i can't seem to find the problem

<button type="button">no block i think</button>

here is the html

1 Answer

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

It helps to know what course and lesson you are referring to, and to be able to see your code. You might want to take a look at this video about Posting a Question. And you may also want to view this one about sharing a snapshot of your workspace.

But putting a quoted term inside other quotes of the same kind causes the term to be taken as an identifier. You can see from the syntax coloring in the first line that the word button is not part of the quoted string. Use a different token (such as apostrophe) for the quotes inside the other quotes (or in this case you can omit them entirely).

Also, unless "req" is a function that returns another function, it probably should not have parentheses after it. As it is, what's being passed is the result of calling "req" instead of a reference to the function itself.

Steven Parker
Steven Parker
231,268 Points
Steven Parker
Steven Parker
231,268 Points

My guess was right about those first 2 issues. Applying my suggestions would give you this:

document.querySelector("button[type='button']").addEventListener("click", req);
//                            note: ^      ^ different quotes                ^ no parentheses

But it also looks like the syntax inside the function is a bit off.   So instead of this:

      ()=>{setTimeout(document.getElementById("jsinsertion").innerHTML="ok ty", 8000)};

… you probably want this:

      setTimeout(() => {document.getElementById("jsinsertion").innerHTML = "ok ty";}, 8000);
//               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
//               note: function definition INSIDE the setTimeout call, as first argument