Can input value escape a JSON object?

I am passing value from input filled directly into a script function inside a JSON object. I was thinking, is it possible that this input can escape this object and can lead to XSS or something.

<script>
...
function doSomething(item) {
data = {'content':item}
}
...
</script>

<input id="search" type="text" value="" oninput="doSomething(this.value)"/>