I am learning React and creating a simple calculator. All HTML is created within React. I am getting a TypeError: Cannot read property ‘innerHTML’ of null. The HTML is rendered before the other functions so I am unsure why I am getting the error message.
The HTML:
function App() {
return (
<div className="App">
<label>Number 1: </label>
<input type="text" id="x"></input>
<br></br>
<label>Number 2: </label>
<input type="text" id="y"></input>
<br></br>
<button onClick={add()}>Add</button>
<button onClick={subtract()}>Subtract</button>
<br></br>
<output id="out"></output>
</div>
);
}
Here is where I am getting the error (at the .innerHTML):
function add() {
var x = document.getElementById('x').innerHTML
var y = document.getElementById('y').innerHTML
var z = x + y
document.getElementById("out").innerHTML = z
}
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